{"id":19558,"date":"2025-11-09T14:27:00","date_gmt":"2025-11-09T06:27:00","guid":{"rendered":"https:\/\/viox.com\/?p=19558"},"modified":"2025-11-09T14:27:02","modified_gmt":"2025-11-09T06:27:02","slug":"what-is-low-level-trigger-relay-arduino","status":"publish","type":"post","link":"https:\/\/test.viox.com\/km\/what-is-low-level-trigger-relay-arduino\/","title":{"rendered":"\u178f\u17be\u17a2\u17d2\u179c\u17b8\u1787\u17b6\u1780\u1798\u17d2\u179a\u17b7\u178f\u1791\u17b6\u1794\u1784\u17d2\u1780\u1794\u1789\u17d2\u1787\u17bc\u1793? (\u1793\u17b7\u1784\u17a0\u17c1\u178f\u17bb\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780 Arduino \u1782\u1798\u17d2\u179a\u17c4\u1784\u178f\u17d2\u179a\u17bc\u179c\u1798\u17bd\u1799)"},"content":{"rendered":"<div class=\"product-intro\">\n<h2>\u179f\u17c1\u1785\u1780\u17d2\u178f\u17b8\u1795\u17d2\u178f\u17be\u1798\u17d6 \u179f\u17c6\u17a1\u17c1\u1784\u1785\u17bb\u1785\u178a\u17c2\u179b\u1798\u17b7\u1793\u178a\u17c2\u179b\u179b\u17c1\u1785\u1785\u17c1\u1789\u1798\u1780<\/h2>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-19563\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Click-That-Never-Came.webp\" alt=\"The Click That Never Came\" width=\"800\" height=\"800\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Click-That-Never-Came.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Click-That-Never-Came-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Click-That-Never-Came-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Click-That-Never-Came-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Click-That-Never-Came-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Click-That-Never-Came-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Click-That-Never-Came-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>\u1798\u17c9\u17c4\u1784 \u17e2:\u17e4\u17e7 \u1793\u17b6\u1791\u17b8\u1796\u17d2\u179a\u17b9\u1780\u17d4 \u17a2\u17d2\u1793\u1780\u1794\u17b6\u1793\u1793\u17c5\u1791\u17b8\u1793\u17c1\u17c7\u17a2\u179f\u17cb\u179a\u1799\u17c8\u1796\u17c1\u179b\u1794\u17b8\u1798\u17c9\u17c4\u1784\u17a0\u17be\u1799\u17d4.<\/p>\n<p>\u1782\u1798\u17d2\u179a\u17c4\u1784 Arduino \u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u1798\u17be\u179b\u1791\u17c5\u179b\u17d2\u17a2\u17a5\u178f\u1781\u17d2\u1785\u17c4\u17c7\u17d4 \u1798\u17c9\u17bc\u178c\u17bb\u179b\u1794\u1789\u17d2\u1787\u17bc\u1793\u178f (relay module) \u17a2\u1784\u17d2\u1782\u17bb\u1799\u1793\u17c5\u1791\u17b8\u1793\u17c4\u17c7\u1793\u17c5\u179b\u17be\u1794\u1793\u17d2\u1791\u17c7 breadboard \u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780 \u178a\u17c4\u1799\u1781\u17d2\u179f\u17c2\u1797\u17d2\u179b\u17be\u1784\u1797\u17d2\u1787\u17b6\u1794\u17cb\u1799\u17c9\u17b6\u1784\u1785\u17d2\u1794\u17b6\u179f\u17cb\u178a\u17bc\u1785\u1780\u17b6\u179a\u1794\u1784\u17d2\u17a0\u17b6\u1789\u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784 tutorial\u17d4 \u17a2\u17d2\u1793\u1780\u1794\u17b6\u1793\u1796\u17b7\u1793\u17b7\u178f\u17d2\u1799\u1794\u17b8\u178a\u1784\u17d6 VCC \u1791\u17c5 5V, GND \u1791\u17c5 GND, IN1 \u1791\u17c5 digital pin 7\u17d4 \u1780\u17bc\u178a\u1785\u1784\u1780\u17d2\u179a\u1784\u17d4 \u17a2\u17d2\u1793\u1780\u1794\u1789\u17d2\u1785\u17bc\u179b\u179c\u17b6\u17d4 Pin 7 \u17a1\u17be\u1784 HIGH\u17d4.<\/p>\n<p>\u1782\u17d2\u1798\u17b6\u1793\u17a2\u17d2\u179c\u17b8\u1791\u17c1\u17d4.<\/p>\n<p>\u1782\u17d2\u1798\u17b6\u1793\u179f\u17c6\u17a1\u17c1\u1784\u1785\u17bb\u1785\u17d4 \u1782\u17d2\u1798\u17b6\u1793 LED \u1791\u17c1\u17d4 \u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u1789\u17d2\u1787\u17bc\u1793\u178f (relay) \u1782\u17d2\u179a\u17b6\u1793\u17cb\u178f\u17c2... \u17a2\u1784\u17d2\u1782\u17bb\u1799\u1793\u17c5\u1791\u17b8\u1793\u17c4\u17c7\u17d4 \u1780\u17c6\u1796\u17bb\u1784\u1785\u17c6\u17a2\u1780\u17a2\u17d2\u1793\u1780\u17d4.<\/p>\n<p>\u17a2\u17d2\u1793\u1780\u1794\u17d2\u178f\u17bc\u179a\u1798\u17c9\u17bc\u178c\u17bb\u179b\u1794\u1789\u17d2\u1787\u17bc\u1793\u178f (relay module)\u17d4 \u1793\u17c5\u178f\u17c2\u1782\u17d2\u1798\u17b6\u1793\u17a2\u17d2\u179c\u17b8\u17d4 \u17a2\u17d2\u1793\u1780\u179f\u17b6\u1780\u179b\u17d2\u1794\u1784 Arduino pin \u1795\u17d2\u179f\u17c1\u1784\u17d4 \u17a2\u178f\u17cb\u1791\u17c1\u17d4 \u17a2\u17d2\u1793\u1780\u179f\u179a\u179f\u17c1\u179a\u1780\u17bc\u178a\u17a1\u17be\u1784\u179c\u17b7\u1789\u178a\u17be\u1798\u17d2\u1794\u17b8\u1792\u17d2\u179c\u17be\u17b1\u17d2\u1799\u1794\u17d2\u179a\u17b6\u1780\u178a\u1790\u17b6\u17a2\u17d2\u1793\u1780\u1780\u17c6\u1796\u17bb\u1784\u1780\u17c6\u178e\u178f\u17cb pin \u1791\u17c5 HIGH\u17d4 \u179c\u17b6\u1794\u1789\u17d2\u1787\u17b6\u1780\u17cb\u17d6 HIGH\u17d4 5 \u179c\u17c9\u17bb\u179b\u17d4 Multimeter \u1799\u179b\u17cb\u1796\u17d2\u179a\u1798\u17d4.<\/p>\n<p>\u17a0\u17be\u1799 <a href=\"https:\/\/test.viox.com\/km\/the-5-different-types-of-relays\/\">\u1794\u1789\u17d2\u1787\u17bc\u1793\u178f<\/a> \u1793\u17c5\u178f\u17c2\u1798\u17b7\u1793\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u17d4.<\/p>\n<p>\u1794\u1793\u17d2\u1791\u17b6\u1794\u17cb\u1798\u1780 \u178a\u17c4\u1799\u179f\u17b6\u179a\u17a2\u179f\u17cb\u179f\u1784\u17d2\u1783\u17b9\u1798 \u17ac\u1785\u1784\u17cb\u178a\u17b9\u1784\u1785\u1784\u17cb\u1783\u17be\u1789\u178a\u17c4\u1799\u179f\u17b6\u179a\u1787\u17b6\u178f\u17b7\u1780\u17b6\u17a0\u17d2\u179c\u17c1\u17a2\u17ca\u17b8\u1793 \u17a2\u17d2\u1793\u1780\u1795\u17d2\u179b\u17b6\u179f\u17cb\u1794\u17d2\u178f\u17bc\u179a\u1794\u1793\u17d2\u1791\u17b6\u178f\u17cb\u1780\u17bc\u178a\u1798\u17bd\u1799\u17d6<\/p>\n<pre><code>digitalWrite(relayPin, LOW); \/\/ \u1795\u17d2\u179b\u17b6\u179f\u17cb\u1794\u17d2\u178f\u17bc\u179a\u1796\u17b8 HIGH<\/code><\/pre>\n<p>\u1785\u17bb\u1785\u17d4.<\/p>\n<p>\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u1789\u17d2\u1787\u17bc\u1793\u178f (relay) \u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u17d4 \u17a2\u17c6\u1796\u17bc\u179b LED \u1794\u17c6\u1797\u17d2\u179b\u17ba\u17d4 \u1798\u17c9\u17b6\u179f\u17ca\u17b8\u1793\u1794\u17bc\u1798\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u1785\u17b6\u1794\u17cb\u1795\u17d2\u178f\u17be\u1798\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u17d4 \u17a2\u17d2\u179c\u17b8\u17d7\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u17d4.<\/p>\n<p>\u179a\u1784\u17cb\u1785\u17b6\u17c6... \u1798\u17c9\u17c1\u1785? \u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u1789\u17d2\u1787\u17bc\u1793\u178f (relay) \u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u1793\u17c5\u1796\u17c1\u179b\u17a2\u17d2\u1793\u1780\u1780\u17c6\u178e\u178f\u17cb pin \u1791\u17c5 LOW \u1787\u17c6\u1793\u17bd\u179f\u17b1\u17d2\u1799 HIGH? \u1793\u17c4\u17c7\u1782\u17ba\u1790\u1799\u1780\u17d2\u179a\u17c4\u1799\u17d4 \u1793\u17c4\u17c7\u1782\u17ba\u1781\u17bb\u179f\u17d4 \u1793\u17c4\u17c7\u1782\u17ba\u2014<\/p>\n<p>\u178f\u17b6\u1798\u1796\u17b7\u178f \u1793\u17c4\u17c7\u1787\u17b6\u179c\u17b7\u1792\u17b8\u178a\u17c2\u179b low level trigger relays \u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u17d4 \u17a0\u17be\u1799\u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b\u17a2\u17d2\u1793\u1780\u1799\u179b\u17cb\u1796\u17b8\u1798\u17bc\u179b\u17a0\u17c1\u178f\u17bb \u17a2\u17d2\u1793\u1780\u1793\u17b9\u1784\u178a\u17b9\u1784\u1790\u17b6\u1796\u17bd\u1780\u179c\u17b6\u1798\u17b7\u1793\u1785\u1798\u17d2\u179b\u17c2\u1780\u1791\u17c1\u2014\u178f\u17b6\u1798\u1796\u17b7\u178f\u1796\u17bd\u1780\u179c\u17b6\u1782\u17ba\u1787\u17b6\u1780\u17b6\u179a\u179a\u1785\u1793\u17b6\u178a\u17cf\u1786\u17d2\u179b\u17b6\u178f\u179c\u17c3\u1787\u17b6\u1784\u17d4.<\/p>\n<p>\u17a2\u1793\u17bb\u1789\u17d2\u1789\u17b6\u178f\u17b1\u17d2\u1799\u1781\u17d2\u1789\u17bb\u17c6\u1796\u1793\u17d2\u1799\u179b\u17cb\u17d4.<\/p>\n<h2>\u17a2\u17d2\u179c\u17b8\u178a\u17c2\u179b \u201cLow Level Trigger\u201d \u1796\u17b7\u178f\u1787\u17b6\u1798\u17b6\u1793\u1793\u17d0\u1799 (\u1787\u17b6\u1797\u17b6\u179f\u17b6\u1792\u1798\u17d2\u1798\u178f\u17b6)<\/h2>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-19560\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/Low-Level-Trigger-Relay-with-Optocoupler.webp\" alt=\"Low Level Trigger Relay (with Optocoupler)\" width=\"800\" height=\"800\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/Low-Level-Trigger-Relay-with-Optocoupler.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/Low-Level-Trigger-Relay-with-Optocoupler-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/Low-Level-Trigger-Relay-with-Optocoupler-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/Low-Level-Trigger-Relay-with-Optocoupler-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/Low-Level-Trigger-Relay-with-Optocoupler-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/Low-Level-Trigger-Relay-with-Optocoupler-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/Low-Level-Trigger-Relay-with-Optocoupler-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u1789\u17d2\u1787\u17bc\u1793\u178f (relay) \u178a\u17c2\u179b\u1798\u17b6\u1793 low level trigger \u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b control pin \u179a\u1794\u179f\u17cb\u179c\u17b6\u1791\u1791\u17bd\u179b\u1794\u17b6\u1793\u179f\u1789\u17d2\u1789\u17b6 LOW (0V\/GND) \u1787\u17c6\u1793\u17bd\u179f\u17b1\u17d2\u1799\u179f\u1789\u17d2\u1789\u17b6 HIGH (5V)\u17d4.<\/p>\n<p>\u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784\u179b\u1780\u17d2\u1781\u1781\u178e\u17d2\u178c\u1793\u17c3 logic \u178c\u17b8\u1787\u17b8\u1790\u179b\u17d6<\/p>\n<ul>\n<li>\u179f\u1789\u17d2\u1789\u17b6 LOW (0V) = Relay ON<\/li>\n<li>\u179f\u1789\u17d2\u1789\u17b6 HIGH (5V) = Relay OFF<\/li>\n<\/ul>\n<p>\u1793\u17c1\u17c7\u178f\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793\u1782\u17c1\u17a0\u17c5\u1795\u1784\u178a\u17c2\u179a\u1790\u17b6 active-low logic \u17ac inverse logic\u17d4.<\/p>\n<p>\u1794\u17d2\u179a\u17c0\u1794\u1792\u17c0\u1794\u179c\u17b6\u1791\u17c5\u1793\u17b9\u1784\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u1789\u17d2\u1787\u17bc\u1793\u178f (relay) \u178a\u17c2\u179b\u1798\u17b6\u1793 high level trigger\u17d6<\/p>\n<ul>\n<li>\u179f\u1789\u17d2\u1789\u17b6 HIGH (5V) = Relay ON<\/li>\n<li>\u179f\u1789\u17d2\u1789\u17b6 LOW (0V) = Relay OFF<\/li>\n<\/ul>\n<p>\u1793\u17c4\u17c7\u17a0\u17be\u1799\u1787\u17b6\u179c\u17b6\u17d4 \u1793\u17c4\u17c7\u1782\u17ba\u1787\u17b6\u1797\u17b6\u1796\u1781\u17bb\u179f\u1782\u17d2\u1793\u17b6\u178a\u17cf\u179f\u17c6\u1781\u17b6\u1793\u17cb\u17d4 \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2\u1793\u17c1\u17c7\u1782\u17ba\u1787\u17b6\u1780\u1793\u17d2\u179b\u17c2\u1784\u178a\u17c2\u179b\u179c\u17b6\u1780\u17b6\u1793\u17cb\u178f\u17c2\u1782\u17bd\u179a\u17b1\u17d2\u1799\u1785\u17b6\u1794\u17cb\u17a2\u17b6\u179a\u1798\u17d2\u1798\u178e\u17cd\u17d6 \u17a0\u17c1\u178f\u17bb\u17a2\u17d2\u179c\u17b8\u1794\u17b6\u1793\u1787\u17b6\u1798\u17c9\u17bc\u178c\u17bb\u179b\u1794\u1789\u17d2\u1787\u17bc\u1793\u178f (relay module) \u1794\u17d2\u179a\u17be\u179c\u17b7\u1792\u17b8\u179f\u17b6\u179f\u17d2\u179a\u17d2\u178f\u178a\u17c2\u179b\u17a0\u17b6\u1780\u17cb\u178a\u17bc\u1785\u1787\u17b6\u1790\u1799\u1780\u17d2\u179a\u17c4\u1799\u1793\u17c1\u17c7?<\/p>\n<h2>\u17a0\u17c1\u178f\u17bb\u17a2\u17d2\u179c\u17b8\u1794\u17b6\u1793\u1787\u17b6\u1798\u17c9\u17bc\u178c\u17bb\u179b\u1794\u1789\u17d2\u1787\u17bc\u1793\u178f (Relay Modules) \u1794\u17d2\u179a\u17be Low Level Triggering (\u17a2\u17b6\u1790\u17cc\u1780\u17c6\u1794\u17b6\u17c6\u1784\u1782\u17ba Optocoupler)<\/h2>\n<p>\u1798\u17c9\u17bc\u178c\u17bb\u179b\u1794\u1789\u17d2\u1787\u17bc\u1793\u178f (relay module) \u1797\u17b6\u1782\u1785\u17d2\u179a\u17be\u1793\u1798\u17b7\u1793\u178f\u17d2\u179a\u17b9\u1798\u178f\u17c2\u1798\u17b6\u1793\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u1789\u17d2\u1787\u17bc\u1793\u178f (relay) \u1794\u17c9\u17bb\u178e\u17d2\u178e\u17c4\u17c7\u1791\u17c1\u2014\u1796\u17bd\u1780\u179c\u17b6\u1798\u17b6\u1793\u179f\u17c0\u1782\u17d2\u179c\u17b8 driver \u1796\u17c1\u1789\u179b\u17c1\u1789\u178a\u17c2\u179b\u1794\u17b6\u1793\u179f\u17b6\u1784\u179f\u1784\u17cb\u179a\u17bd\u1785\u1787\u17b6\u179f\u17d2\u179a\u17c1\u1785\u17d4 \u1794\u17c1\u17c7\u178a\u17bc\u1784\u1793\u17c3\u179f\u17c0\u1782\u17d2\u179c\u17b8\u1793\u17c1\u17c7\u1782\u17ba optocoupler (\u178f\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793\u1782\u17c1\u17a0\u17c5\u1795\u1784\u178a\u17c2\u179a\u1790\u17b6 opto-isolator) \u1787\u17b6\u1792\u1798\u17d2\u1798\u178f\u17b6 PC817 \u17ac\u179f\u17d2\u179a\u178a\u17c0\u1784\u1782\u17d2\u1793\u17b6\u17d4.<\/p>\n<h3>\u1780\u17b6\u179a\u179a\u1785\u1793\u17b6\u179f\u17c0\u1782\u17d2\u179c\u17b8 Optocoupler<\/h3>\n<p>\u1793\u17c1\u17c7\u1782\u17ba\u1787\u17b6\u17a2\u17d2\u179c\u17b8\u178a\u17c2\u179b\u1796\u17b7\u178f\u1787\u17b6\u1798\u17b6\u1793\u1793\u17c5\u1781\u17b6\u1784\u1780\u17d2\u1793\u17bb\u1784\u1798\u17c9\u17bc\u178c\u17bb\u179b\u1794\u1789\u17d2\u1787\u17bc\u1793\u178f (relay module) \u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u17d6<\/p>\n<h4>Input Side (Control Signal):<\/h4>\n<ul>\n<li>Digital pin \u179a\u1794\u179f\u17cb Arduino \u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u1797\u17d2\u1787\u17b6\u1794\u17cb\u1791\u17c5 \u201cIN\u201d<\/li>\n<li>IN \u1797\u17d2\u1787\u17b6\u1794\u17cb\u1791\u17c5 LED \u1793\u17c5\u1781\u17b6\u1784\u1780\u17d2\u1793\u17bb\u1784 optocoupler (\u178f\u17b6\u1798\u179a\u1799\u17c8 resistor)<\/li>\n<li>Cathode \u179a\u1794\u179f\u17cb LED \u1797\u17d2\u1787\u17b6\u1794\u17cb\u1791\u17c5 GND<\/li>\n<\/ul>\n<h4>Output Side (Relay Coil):<\/h4>\n<ul>\n<li>Phototransistor (\u1793\u17c5\u1781\u17b6\u1784\u1780\u17d2\u1793\u17bb\u1784 optocoupler) \u179f\u17d2\u179c\u17c2\u1784\u179a\u1780\u1796\u1793\u17d2\u179b\u17ba\u179a\u1794\u179f\u17cb LED<\/li>\n<li>Transistor \u1793\u17c1\u17c7\u1787\u17c6\u179a\u17bb\u1789 NPN transistor (\u178a\u17bc\u1785\u1787\u17b6 2N3904)<\/li>\n<li>NPN transistor \u1795\u17d2\u178f\u179b\u17cb\u1790\u17b6\u1798\u1796\u179b\u178a\u179b\u17cb relay coil<\/li>\n<\/ul>\n<p>\u1796\u17d0\u178f\u17cc\u1798\u17b6\u1793\u179b\u1798\u17d2\u17a2\u17b7\u178f\u179f\u17c6\u1781\u17b6\u1793\u17cb\u17d6 LED \u179a\u1794\u179f\u17cb optocoupler \u178f\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793\u1781\u17d2\u179f\u17c2\u179a\u179c\u17b6\u1784 VCC \u1793\u17b7\u1784 IN pin\u17d4 \u1793\u17c1\u17c7\u1782\u17ba\u1787\u17b6\u1782\u1793\u17d2\u179b\u17b9\u17c7\u1780\u17d2\u1793\u17bb\u1784\u1780\u17b6\u179a\u1799\u179b\u17cb\u178a\u17b9\u1784\u17a2\u17c6\u1796\u17b8 low-level triggering\u17d4.<\/p>\n<h3>\u179a\u1794\u17c0\u1794\u178a\u17c2\u179b Low Level Triggering \u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a<\/h3>\n<p>\u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b IN pin = HIGH (5V):<\/p>\n<ul>\n<li>\u1797\u17b6\u1796\u1781\u17bb\u179f\u1782\u17d2\u1793\u17b6\u1793\u17c3\u179c\u17c9\u17bb\u179b\u1786\u17d2\u179b\u1784\u1780\u17b6\u178f\u17cb LED = 5V \u2013 5V = 0V<\/li>\n<li>\u1782\u17d2\u1798\u17b6\u1793\u1785\u179a\u1793\u17d2\u178f\u17a0\u17bc\u179a\u178f\u17b6\u1798 LED \u1791\u17c1\u17d4<\/li>\n<li>LED \u1793\u17c5\u178f\u17c2\u1794\u17b7\u1791<\/li>\n<li>Phototransistor \u1793\u17c5\u178f\u17c2\u1794\u17b7\u1791<\/li>\n<li>Relay coil \u1798\u17b7\u1793\u1791\u1791\u17bd\u179b\u1794\u17b6\u1793\u1790\u17b6\u1798\u1796\u179b<\/li>\n<li>Relay \u1793\u17c5\u178f\u17c2\u1794\u17b7\u1791<\/li>\n<\/ul>\n<p>\u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b IN pin = LOW (0V\/GND):<\/p>\n<ul>\n<li>\u1797\u17b6\u1796\u1781\u17bb\u179f\u1782\u17d2\u1793\u17b6\u1793\u17c3\u179c\u17c9\u17bb\u179b\u1786\u17d2\u179b\u1784\u1780\u17b6\u178f\u17cb LED = 5V \u2013 0V = 5V<\/li>\n<li>\u1785\u179a\u1793\u17d2\u178f\u17a0\u17bc\u179a\u178f\u17b6\u1798 LED (\u1780\u17c6\u178e\u178f\u17cb\u178a\u17c4\u1799 resistor)<\/li>\n<li>LED \u1794\u17c6\u1797\u17d2\u179b\u17ba<\/li>\n<li>Phototransistor \u1794\u17be\u1780<\/li>\n<li>NPN transistor \u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a<\/li>\n<li>Relay coil \u1795\u17d2\u178f\u179b\u17cb\u1790\u17b6\u1798\u1796\u179b<\/li>\n<li>Relay \u1785\u17bb\u1785\u1794\u17be\u1780<\/li>\n<\/ul>\n<p>\u201cAha Moment\u201d\u17d6 \u179f\u17c0\u1782\u17d2\u179c\u17b8\u1791\u17b6\u1789\u1785\u179a\u1793\u17d2\u178f\u1796\u17b8 VCC \u1791\u17c5 GND \u178f\u17b6\u1798\u179a\u1799\u17c8 IN pin\u17d4 \u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b Arduino pin \u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u1782\u17ba LOW \u179c\u17b6\u1795\u17d2\u178f\u179b\u17cb\u1795\u17d2\u179b\u17bc\u179c\u1791\u17c5\u178a\u17b8 \u178a\u17c4\u1799\u1794\u1789\u17d2\u1785\u1794\u17cb\u179f\u17c0\u1782\u17d2\u179c\u17b8\u17d4 \u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b HIGH \u1798\u17b7\u1793\u1798\u17b6\u1793\u1797\u17b6\u1796\u1781\u17bb\u179f\u1782\u17d2\u1793\u17b6\u1793\u17c3\u179c\u17c9\u17bb\u179b \u178a\u17bc\u1785\u17d2\u1793\u17c1\u17c7\u1782\u17d2\u1798\u17b6\u1793\u1785\u179a\u1793\u17d2\u178f\u17a0\u17bc\u179a\u1791\u17c1\u17d4.<\/p>\n<h2>\u17a0\u17c1\u178f\u17bb\u17a2\u17d2\u179c\u17b8\u1794\u17b6\u1793\u1787\u17b6\u1780\u17b6\u179a\u179a\u1785\u1793\u17b6\u1793\u17c1\u17c7\u1796\u17b7\u178f\u1787\u17b6\u17a2\u179f\u17d2\u1785\u17b6\u179a\u17d2\u1799<\/h2>\n<ol>\n<li><strong>Fail-Safe Behavior:<\/strong> \u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be\u1781\u17d2\u179f\u17c2\u1794\u1789\u17d2\u1787\u17b6\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u178a\u17b6\u1785\u17cb \u17ac\u1795\u17d2\u178f\u17b6\u1785\u17cb IN pin \u17a2\u178e\u17d2\u178f\u17c2\u178f HIGH (\u1791\u17b6\u1789\u17a1\u17be\u1784\u1781\u17b6\u1784\u1780\u17d2\u1793\u17bb\u1784\u178a\u17c4\u1799\u1794\u178e\u17d2\u178f\u17b6\u1789 resistor)\u17d4 \u1793\u17c1\u17c7\u179a\u1780\u17d2\u179f\u17b6 relay \u17b1\u17d2\u1799\u1794\u17b7\u1791\u178f\u17b6\u1798\u179b\u17c6\u1793\u17b6\u17c6\u178a\u17be\u1798\u2014\u1798\u17b6\u1793\u179f\u17bb\u179c\u178f\u17d2\u1790\u17b7\u1797\u17b6\u1796\u1787\u17b6\u1784\u1780\u17b6\u179a\u1794\u17be\u1780\u178a\u17c4\u1799\u1785\u17c3\u178a\u1793\u17d2\u1799\u17d4.<\/li>\n<li><strong>\u1780\u17b6\u179a\u1780\u17b6\u179a\u1796\u17b6\u179a\u1794\u17d2\u179a\u1786\u17b6\u17c6\u1784\u1793\u17b9\u1784 Floating Pins:<\/strong> \u1780\u17c6\u17a1\u17bb\u1784\u1796\u17c1\u179b Arduino boot-up, pins \u179f\u17d2\u1790\u17b7\u178f\u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784\u179f\u17d2\u1790\u17b6\u1793\u1797\u17b6\u1796\u1798\u17b7\u1793\u1785\u17d2\u1794\u17b6\u179f\u17cb\u179b\u17b6\u179f\u17cb\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1796\u17b8\u179a\u1794\u17b8\u1798\u17b8\u179b\u17b8\u179c\u17b7\u1793\u17b6\u1791\u17b8\u17d4 \u1787\u17b6\u1798\u17bd\u1799\u1793\u17b9\u1784 low-level trigger \u1793\u17c1\u17c7\u1787\u17b6\u1792\u1798\u17d2\u1798\u178f\u17b6\u1794\u178e\u17d2\u178f\u17b6\u179b\u17b1\u17d2\u1799 relay \u1794\u17b7\u1791 (\u1798\u17b6\u1793\u179f\u17bb\u179c\u178f\u17d2\u1790\u17b7\u1797\u17b6\u1796) \u1787\u17b6\u1787\u17b6\u1784 relay \u1794\u17be\u1780 (\u17a2\u17b6\u1785\u1798\u17b6\u1793\u1782\u17d2\u179a\u17c4\u17c7\u1790\u17d2\u1793\u17b6\u1780\u17cb\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1794\u1793\u17d2\u1791\u17bb\u1780\u1790\u17b6\u1798\u1796\u179b\u1781\u17d2\u1796\u179f\u17cb)\u17d4.<\/li>\n<li><strong>\u1780\u17b6\u179a\u1794\u17d2\u179a\u17be\u1794\u17d2\u179a\u17b6\u179f\u17cb\u1785\u179a\u1793\u17d2\u178f\u1791\u17b6\u1794\u1796\u17b8 Microcontroller:<\/strong> \u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b relay \u1794\u17b7\u1791 (\u179f\u17d2\u1790\u17b6\u1793\u1797\u17b6\u1796\u1791\u17bc\u1791\u17c5\u1794\u17c6\u1795\u17bb\u178f\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8\u1787\u17b6\u1785\u17d2\u179a\u17be\u1793) microcontroller pin \u1782\u17ba HIGH \u17a0\u17be\u1799\u1795\u17d2\u178f\u179b\u17cb\u1785\u179a\u1793\u17d2\u178f\u179f\u17d2\u1791\u17be\u179a\u178f\u17c2\u179f\u17bc\u1793\u17d2\u1799\u17d4 \u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b\u17a2\u17d2\u1793\u1780\u178f\u17d2\u179a\u17bc\u179c\u1780\u17b6\u179a\u1794\u17be\u1780 relay pin \u1791\u17c5 LOW \u17a0\u17be\u1799\u179f\u17d2\u179a\u17bc\u1794\u1785\u179a\u1793\u17d2\u178f\u2014\u178a\u17c2\u179b microcontroller pins \u1787\u17b6\u1792\u1798\u17d2\u1798\u178f\u17b6\u179b\u17d2\u17a2\u1787\u17b6\u1784\u1780\u17d2\u1793\u17bb\u1784\u1780\u17b6\u179a\u178a\u17c4\u17c7\u179f\u17d2\u179a\u17b6\u1799\u1787\u17b6\u1784\u1780\u17b6\u179a\u1795\u17d2\u178f\u179b\u17cb\u17d4.<\/li>\n<li><strong>\u1797\u17b6\u1796\u1786\u1794\u1782\u17d2\u1793\u17b6 3.3V:<\/strong> ESP32 \u1793\u17b7\u1784\u17a7\u1794\u1780\u179a\u178e\u17cd 3.3V \u179f\u17d2\u179a\u178a\u17c0\u1784\u1782\u17d2\u1793\u17b6\u1798\u17b6\u1793\u1780\u17b6\u179a\u179b\u17c6\u1794\u17b6\u1780\u1780\u17d2\u1793\u17bb\u1784\u1780\u17b6\u179a\u1787\u17c6\u179a\u17bb\u1789\u1798\u17c9\u17bc\u178c\u17bb\u179b relay 5V \u1799\u17c9\u17b6\u1784\u1782\u17bd\u179a\u17b1\u17d2\u1799\u1791\u17bb\u1780\u1785\u17b7\u178f\u17d2\u178f\u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784 high-level configuration\u17d4 \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2\u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784 low-level mode, 3.3V pin \u17a2\u17b6\u1785\u179f\u17d2\u179a\u17bc\u1794\u1785\u179a\u1793\u17d2\u178f\u1791\u17c5\u178a\u17b8\u1794\u17b6\u1793\u1799\u17c9\u17b6\u1784\u179b\u17d2\u17a2 \u1791\u17c4\u17c7\u1794\u17b8\u1787\u17b6 VCC \u1782\u17ba 5V \u1780\u17cf\u178a\u17c4\u1799\u17d4 \u1793\u17c1\u17c7\u1792\u17d2\u179c\u17be\u17b1\u17d2\u1799 low-level trigger modules \u1780\u17b6\u1793\u17cb\u178f\u17c2\u1798\u17b6\u1793\u1797\u17b6\u1796\u1786\u1794\u1782\u17d2\u1793\u17b6\u1787\u17b6\u179f\u1780\u179b\u17d4.<\/li>\n<\/ol>\n<p>Pro Tip: \u1793\u17c1\u17c7\u1787\u17b6\u1798\u17bc\u179b\u17a0\u17c1\u178f\u17bb\u178a\u17c2\u179b\u1798\u17c9\u17bc\u178c\u17bb\u179b relay \u1796\u17b6\u178e\u17b7\u1787\u17d2\u1787\u1780\u1798\u17d2\u1798\u1797\u17b6\u1782\u1785\u17d2\u179a\u17be\u1793\u1780\u17c6\u178e\u178f\u17cb\u1791\u17c5 low-level trigger \u178f\u17b6\u1798\u179b\u17c6\u1793\u17b6\u17c6\u178a\u17be\u1798\u2014\u179c\u17b6\u1782\u17ba\u1787\u17b6\u1780\u17b6\u179a\u179a\u1785\u1793\u17b6\u178a\u17c2\u179b\u179a\u17b9\u1784\u1798\u17b6\u17c6 \u1786\u1794\u1782\u17d2\u1793\u17b6 \u1793\u17b7\u1784\u1798\u17b6\u1793\u179f\u17bb\u179c\u178f\u17d2\u1790\u17b7\u1797\u17b6\u1796\u1787\u17b6\u1784\u17d4.<\/p>\n<h2>\u179a\u1794\u17c0\u1794\u178f\u1781\u17d2\u179f\u17c2\u1794\u1789\u17d2\u1787\u17b6 Relay \u1780\u1798\u17d2\u179a\u17b7\u178f\u1791\u17b6\u1794 (\u1798\u17d2\u178f\u1784\u1798\u17bd\u1799\u1787\u17c6\u17a0\u17b6\u1793)<\/h2>\n<h3>\u1780\u17b6\u179a\u178f\u1781\u17d2\u179f\u17c2\u1798\u17bc\u179b\u178a\u17d2\u178b\u17b6\u1793\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb Arduino Uno (Logic 5V)<\/h3>\n<h4>\u1780\u17b6\u179a\u178f\u1797\u17d2\u1787\u17b6\u1794\u17cb\u1790\u17b6\u1798\u1796\u179b\u17d6<\/h4>\n<ul>\n<li>Relay VCC \u2192 Arduino 5V<\/li>\n<li>Relay GND \u2192 Arduino GND<\/li>\n<\/ul>\n<h4>\u179f\u1789\u17d2\u1789\u17b6\u1794\u1789\u17d2\u1787\u17b6\u17d6<\/h4>\n<ul>\n<li>Relay IN \u2192 Arduino Digital Pin (\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd Pin 7)<\/li>\n<\/ul>\n<h4>\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd\u1780\u17bc\u178a\u17d6<\/h4>\n<pre><code>const int relayPin = 7;<\/code><\/pre>\n<p>\u17a2\u17d2\u179c\u17b8\u178a\u17c2\u179b\u1780\u17c6\u1796\u17bb\u1784\u1780\u17be\u178f\u17a1\u17be\u1784\u17d6<\/p>\n<ul>\n<li>HIGH (5V) \u1792\u17d2\u179c\u17be\u17b1\u17d2\u1799 Relay \u1794\u17b7\u1791<\/li>\n<li>LOW (0V) \u1794\u17be\u1780 Relay<\/li>\n<\/ul>\n<h3>\u1780\u17b6\u179a\u178f\u1781\u17d2\u179f\u17c2\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb ESP32 (Logic 3.3V)<\/h3>\n<p>ESP32 \u1791\u17b7\u1793\u17d2\u1793\u1795\u179b 3.3V \u1793\u17c5 HIGH \u178a\u17c2\u179b\u17a2\u17b6\u1785\u1794\u178e\u17d2\u178f\u17b6\u179b\u17b1\u17d2\u1799\u1798\u17b6\u1793\u1794\u1789\u17d2\u17a0\u17b6\u1787\u17b6\u1798\u17bd\u1799\u1798\u17c9\u17bc\u178c\u17bb\u179b Relay 5V \u1798\u17bd\u1799\u1785\u17c6\u1793\u17bd\u1793\u17d4 \u1793\u17c1\u17c7\u1782\u17ba\u1787\u17b6\u179c\u17b7\u1792\u17b8\u179f\u17b6\u179f\u17d2\u179a\u17d2\u178f\u178a\u17c2\u179b\u17a2\u17b6\u1785\u1791\u17bb\u1780\u1785\u17b7\u178f\u17d2\u178f\u1794\u17b6\u1793\u17d6<\/p>\n<h4>\u1780\u17b6\u179a\u178f\u1797\u17d2\u1787\u17b6\u1794\u17cb\u1790\u17b6\u1798\u1796\u179b\u17d6<\/h4>\n<ul>\n<li>Relay VCC \u2192 \u1780\u17b6\u179a\u1795\u17d2\u1782\u178f\u17cb\u1795\u17d2\u1782\u1784\u17cb 5V \u1781\u17b6\u1784\u1780\u17d2\u179a\u17c5 (\u17ac Pin 5V \u179a\u1794\u179f\u17cb ESP32 \u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be\u1794\u17d2\u179a\u17be\u1790\u17b6\u1798\u1796\u179b USB)<\/li>\n<li>Relay GND \u2192 Common ground \u1787\u17b6\u1798\u17bd\u1799 ESP32<\/li>\n<\/ul>\n<h4>\u179f\u1789\u17d2\u1789\u17b6\u1794\u1789\u17d2\u1787\u17b6\u17d6<\/h4>\n<ul>\n<li>Relay IN \u2192 ESP32 GPIO Pin (\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd GPIO 23)<\/li>\n<\/ul>\n<h4>\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd\u1780\u17bc\u178a\u17d6<\/h4>\n<pre><code>const int relayPin = 23;  \/\/ ESP32 GPIO23<\/code><\/pre>\n<p>\u17a0\u17c1\u178f\u17bb\u17a2\u17d2\u179c\u17b8\u1794\u17b6\u1793\u1787\u17b6\u179c\u17b6\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u1787\u17b6\u1798\u17bd\u1799 3.3V\u17d6<\/p>\n<p>\u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b Pin ESP32 \u1791\u17c5 LOW (0V) \u179c\u17b6\u1795\u17d2\u178f\u179b\u17cb\u1795\u17d2\u179b\u17bc\u179c\u178a\u17b8\u17d4 LED \u179a\u1794\u179f\u17cb Optocoupler \u178f\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793\u1794\u17c6\u1796\u17b6\u1780\u17cb\u178a\u17c4\u1799\u1780\u17b6\u179a\u1795\u17d2\u1782\u178f\u17cb\u1795\u17d2\u1782\u1784\u17cb 5V VCC \u178a\u17bc\u1785\u17d2\u1793\u17c1\u17c7\u1780\u17b6\u179a\u1792\u17d2\u179b\u17b6\u1780\u17cb\u1785\u17bb\u17c7\u179c\u17c9\u17bb\u179b 5V \u1796\u17c1\u1789\u179b\u17c1\u1789\u1780\u17be\u178f\u17a1\u17be\u1784\u1793\u17c5\u1791\u17bc\u1791\u17b6\u17c6\u1784 LED \u2014 \u1782\u17d2\u179a\u1794\u17cb\u1782\u17d2\u179a\u17b6\u1793\u17cb\u178a\u17be\u1798\u17d2\u1794\u17b8\u1794\u17c6\u1797\u17d2\u179b\u17ba\u179c\u17b6 \u1793\u17b7\u1784\u1794\u1789\u17d2\u1787\u17b6 Relay \u17d4.<\/p>\n<p>\u1782\u1793\u17d2\u179b\u17b9\u17c7\u1787\u17c6\u1793\u17b6\u1789\u17d6 \u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be\u1798\u17c9\u17bc\u178c\u17bb\u179b Relay \u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u1798\u17b6\u1793 Jumper \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb JD-VCC (\u1790\u17b6\u1798\u1796\u179b Relay) \u178a\u17b6\u1785\u17cb\u178a\u17c4\u1799\u17a1\u17c2\u1780\u1796\u17b8 VCC (\u1790\u17b6\u1798\u1796\u179b Logic) \u179f\u17bc\u1798\u178a\u1780 Jumper \u1785\u17c1\u1789 \u17a0\u17be\u1799\u1795\u17d2\u178f\u179b\u17cb\u1790\u17b6\u1798\u1796\u179b JD-VCC \u1796\u17b8 5V \u1781\u178e\u17c8\u1796\u17c1\u179b\u178a\u17c2\u179b\u179a\u1780\u17d2\u179f\u17b6 VCC \u1793\u17c5 3.3V \u17d4 \u1793\u17c1\u17c7\u1795\u17d2\u178f\u179b\u17cb\u1793\u17bc\u179c\u1780\u17b6\u179a\u178a\u17b6\u1785\u17cb\u178a\u17c4\u1799\u17a1\u17c2\u1780\u1796\u17c1\u1789\u179b\u17c1\u1789 \u1793\u17b7\u1784\u1797\u17b6\u1796\u1787\u17bf\u1787\u17b6\u1780\u17cb\u1780\u17b6\u1793\u17cb\u178f\u17c2\u1794\u17d2\u179a\u179f\u17be\u179a\u1787\u17b6\u1798\u17bd\u1799 Microcontroller 3.3V \u17d4.<\/p>\n<h2>\u1780\u1798\u17d2\u179a\u17b7\u178f\u1791\u17b6\u1794 vs \u1780\u1798\u17d2\u179a\u17b7\u178f\u1781\u17d2\u1796\u179f\u17cb\u17d6 \u178f\u17be\u17a2\u17d2\u1793\u1780\u1782\u17bd\u179a\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u1798\u17bd\u1799\u178e\u17b6?<\/h2>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-19561\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/High-Level-Trigger-Relay-Conceptual.webp\" alt=\"High Level Trigger Relay (Conceptual)\" width=\"800\" height=\"800\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/High-Level-Trigger-Relay-Conceptual.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/High-Level-Trigger-Relay-Conceptual-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/High-Level-Trigger-Relay-Conceptual-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/High-Level-Trigger-Relay-Conceptual-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/High-Level-Trigger-Relay-Conceptual-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/High-Level-Trigger-Relay-Conceptual-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/High-Level-Trigger-Relay-Conceptual-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>\u1798\u17c9\u17bc\u178c\u17bb\u179b Relay \u1797\u17b6\u1782\u1785\u17d2\u179a\u17be\u1793\u1797\u17d2\u1787\u17b6\u1794\u17cb\u1798\u1780\u1787\u17b6\u1798\u17bd\u1799 Jumper \u17ac Switch \u178a\u17be\u1798\u17d2\u1794\u17b8\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u179a\u179c\u17b6\u1784\u179a\u1794\u17c0\u1794\u1794\u1789\u17d2\u1787\u17b6\u1780\u1798\u17d2\u179a\u17b7\u178f\u1791\u17b6\u1794 \u1793\u17b7\u1784\u1780\u1798\u17d2\u179a\u17b7\u178f\u1781\u17d2\u1796\u179f\u17cb\u17d4 \u1793\u17c1\u17c7\u1782\u17ba\u1787\u17b6\u1796\u17c1\u179b\u178a\u17c2\u179b\u178f\u17d2\u179a\u17bc\u179c\u1794\u17d2\u179a\u17be\u1793\u17b8\u1798\u17bd\u1799\u17d7\u17d6<\/p>\n<h3>\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u1780\u17b6\u179a\u1794\u1789\u17d2\u1787\u17b6\u1780\u1798\u17d2\u179a\u17b7\u178f\u1791\u17b6\u1794\u1793\u17c5\u1796\u17c1\u179b\u17d6<\/h3>\n<ul>\n<li>\u2705 \u1794\u17d2\u179a\u17be Microcontroller 3.3V (ESP32, ESP8266, Raspberry Pi)<\/li>\n<li>\u2705 \u17a2\u17d2\u1793\u1780\u1785\u1784\u17cb\u1794\u17b6\u1793\u17a5\u179a\u17b7\u1799\u17b6\u1794\u1790\u179f\u17bb\u179c\u178f\u17d2\u1790\u17b7\u1797\u17b6\u1796 (Relay \u179b\u17c6\u1793\u17b6\u17c6\u178a\u17be\u1798\u1794\u17b7\u1791 \u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be\u1781\u17d2\u179f\u17c2\u1794\u1789\u17d2\u1787\u17b6\u1794\u179a\u17b6\u1787\u17d0\u1799)<\/li>\n<li>\u2705 \u1792\u17d2\u179c\u17be\u1780\u17b6\u179a\u1787\u17b6\u1798\u17bd\u1799\u1798\u17c9\u17bc\u178c\u17bb\u179b Relay \u178a\u17c2\u179b\u1798\u17b7\u1793\u179f\u17d2\u1782\u17b6\u179b\u17cb \u17ac\u1798\u17b7\u1793\u1794\u17b6\u1793\u179f\u17b6\u1780\u179b\u17d2\u1794\u1784 (\u179c\u17b6\u1787\u17b6\u179a\u1794\u17c0\u1794\u1791\u17bc\u1791\u17c5\/\u1786\u1794\u1782\u17d2\u1793\u17b6\u1787\u17b6\u1784)<\/li>\n<li>\u2705 \u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u178f\u1798\u17d2\u179a\u17bc\u179c\u17b1\u17d2\u1799 Load \u1794\u17b7\u1791\u1797\u17b6\u1782\u1785\u17d2\u179a\u17be\u1793<\/li>\n<li>\u2705 \u17a2\u17d2\u1793\u1780\u1787\u17b6\u17a2\u17d2\u1793\u1780\u1785\u17b6\u1794\u17cb\u1795\u17d2\u178f\u17be\u1798\u178a\u17c6\u1794\u17bc\u1784 (\u1791\u17c6\u1793\u1784\u1787\u17b6\u1798\u17b7\u1793\u179f\u17bc\u179c\u1798\u17b6\u1793\u1794\u1789\u17d2\u17a0\u17b6\u1786\u1794\u1782\u17d2\u1793\u17b6)<\/li>\n<\/ul>\n<h4>\u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd\u17d6<\/h4>\n<ul>\n<li>\u179f\u17d2\u179c\u17d0\u1799\u1794\u17d2\u179a\u179c\u178f\u17d2\u178f\u17b7\u1780\u1798\u17d2\u1798\u1795\u17d2\u1791\u17c7 (\u1797\u17d2\u179b\u17be\u1784\u1794\u17b7\u1791\u178f\u17b6\u1798\u179b\u17c6\u1793\u17b6\u17c6\u178a\u17be\u1798)<\/li>\n<li>\u1794\u17d2\u179a\u1796\u17d0\u1793\u17d2\u1792\u1787\u17bc\u1793\u178a\u17c6\u178e\u17b9\u1784 (\u179f\u17c6\u17a1\u17c1\u1784\u179f\u17ca\u17b8\u179a\u17c9\u17c2\u1793\u1794\u17b7\u1791\u178f\u17b6\u1798\u179b\u17c6\u1793\u17b6\u17c6\u178a\u17be\u1798)<\/li>\n<li>\u1780\u17b6\u179a\u1782\u17d2\u179a\u1794\u17cb\u1782\u17d2\u179a\u1784\u179f\u17d2\u1793\u1794\u17cb (\u179f\u17d2\u1793\u1794\u17cb\u1794\u17b7\u1791 \u179b\u17bb\u17c7\u178f\u17d2\u179a\u17b6\u178f\u17c2\u1798\u17b6\u1793\u1780\u17b6\u179a\u1794\u1789\u17d2\u1787\u17b6\u1799\u17c9\u17b6\u1784\u179f\u1780\u1798\u17d2\u1798)<\/li>\n<li>Safety Interlock (\u17a7\u1794\u1780\u179a\u178e\u17cd\u178f\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793\u1794\u17b7\u1791 \u179b\u17bb\u17c7\u178f\u17d2\u179a\u17b6\u178f\u17c2\u1794\u17be\u1780\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u1799\u17c9\u17b6\u1784\u179f\u1780\u1798\u17d2\u1798)<\/li>\n<\/ul>\n<h3>\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u1780\u17b6\u179a\u1794\u1789\u17d2\u1787\u17b6\u1780\u1798\u17d2\u179a\u17b7\u178f\u1781\u17d2\u1796\u179f\u17cb\u1793\u17c5\u1796\u17c1\u179b\u17d6<\/h3>\n<ul>\n<li>\u2705 \u17a2\u17d2\u1793\u1780\u178f\u17d2\u179a\u17bc\u179c\u1780\u17b6\u179a Relay \u1794\u17be\u1780\u1780\u17c6\u17a1\u17bb\u1784\u1796\u17c1\u179b Arduino Reset\/Boot (\u1780\u1798\u17d2\u179a \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2\u1780\u179a\u178e\u17b8\u1794\u17d2\u179a\u17be\u1794\u17d2\u179a\u17b6\u179f\u17cb\u1787\u17b6\u1780\u17cb\u179b\u17b6\u1780\u17cb)<\/li>\n<li>\u2705 \u1792\u17d2\u179c\u17be\u1780\u17b6\u179a\u1787\u17b6\u1798\u17bd\u1799 Normally-Closed (NC) Load \u178a\u17c2\u179b\u17a2\u17d2\u1793\u1780\u1785\u1784\u17cb\u1794\u17b6\u1793\u17a5\u179a\u17b7\u1799\u17b6\u1794\u1790\u1794\u1789\u17d2\u1785\u17d2\u179a\u17b6\u179f<\/li>\n<li>\u2705 Logic \u1780\u17bc\u178a\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u1780\u17b6\u1793\u17cb\u178f\u17c2\u179f\u17b6\u1798\u1789\u17d2\u1789\u1787\u17b6\u1798\u17bd\u1799 \u201cHIGH = ON\u201d (\u1785\u17c6\u178e\u1784\u17cb\u1785\u17c6\u178e\u17bc\u179b\u1785\u17b7\u178f\u17d2\u178f\u1795\u17d2\u1791\u17b6\u179b\u17cb\u1781\u17d2\u179b\u17bd\u1793)<\/li>\n<li>\u2705 Interfacing \u1787\u17b6\u1798\u17bd\u1799\u1794\u17d2\u179a\u1796\u17d0\u1793\u17d2\u1792\u1794\u1789\u17d2\u1787\u17b6 Active-High (PLC, Industrial Controller)<\/li>\n<\/ul>\n<h4>\u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd\u17d6<\/h4>\n<ul>\n<li>\u1797\u17d2\u179b\u17be\u1784\u179f\u1784\u17d2\u1782\u17d2\u179a\u17c4\u17c7\u1794\u1793\u17d2\u1791\u17b6\u1793\u17cb (\u1793\u17c5\u178f\u17c2\u1794\u17be\u1780\u1780\u17c6\u17a1\u17bb\u1784\u1796\u17c1\u179b\u178a\u17b6\u1785\u17cb\u1785\u179a\u1793\u17d2\u178f\u17a2\u1782\u17d2\u1782\u17b7\u179f\u1793\u17b8)<\/li>\n<li>\u1798\u17c9\u17b6\u179f\u17ca\u17b8\u1793\u1780\u17c6\u178a\u17c5 (\u1794\u17be\u1780\u178f\u17b6\u1798\u179b\u17c6\u1793\u17b6\u17c6\u178a\u17be\u1798\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u179f\u17bb\u179c\u178f\u17d2\u1790\u17b7\u1797\u17b6\u1796)<\/li>\n<li>\u1794\u17d2\u179a\u1796\u17d0\u1793\u17d2\u1792\u1795\u17d2\u178f\u17b6\u1785\u17cb\u1790\u17d2\u1798 (\u178f\u1798\u17d2\u179a\u17bc\u179c\u1780\u17b6\u179a\u179f\u17bb\u179c\u178f\u17d2\u1790\u17b7\u1797\u17b6\u1796\u1787\u17b6\u1780\u17cb\u179b\u17b6\u1780\u17cb)<\/li>\n<\/ul>\n<h2>\u1780\u17b6\u179a\u1796\u17b7\u178f\u178a\u17cf\u179f\u17d2\u1798\u17c4\u17c7\u178f\u17d2\u179a\u1784\u17cb\u17d6 \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1782\u1798\u17d2\u179a\u17c4\u1784 Arduino\/ESP32 95% \u1780\u17b6\u179a\u1794\u1789\u17d2\u1787\u17b6\u1780\u1798\u17d2\u179a\u17b7\u178f\u1791\u17b6\u1794\u1782\u17ba\u1787\u17b6\u1787\u1798\u17d2\u179a\u17be\u179f\u178a\u17cf\u179b\u17d2\u17a2\u1794\u17c6\u1795\u17bb\u178f\u17d4.<\/h2>\n<p>\u179c\u17b6\u1798\u17b6\u1793\u1797\u17b6\u1796\u1786\u1794\u1782\u17d2\u1793\u17b6 \u17a2\u17b6\u1785\u1791\u17bb\u1780\u1785\u17b7\u178f\u17d2\u178f\u1794\u17b6\u1793 \u1793\u17b7\u1784\u1798\u17b6\u1793\u179f\u17bb\u179c\u178f\u17d2\u1790\u17b7\u1797\u17b6\u1796\u1787\u17b6\u1784\u17d4 \u1780\u17bb\u17c6\u1782\u17b7\u178f\u1785\u17d2\u179a\u17be\u1793\u1796\u17c1\u1780\u17d4.<\/p>\n<h2>\u1780\u17c6\u17a0\u17bb\u179f\u1791\u17bc\u1791\u17c5 \u1793\u17b7\u1784\u179c\u17b7\u1792\u17b8\u1787\u17bd\u179f\u1787\u17bb\u179b\u1796\u17bd\u1780\u179c\u17b6<\/h2>\n<h3>\u1780\u17c6\u17a0\u17bb\u179f\u1791\u17b8 1\u17d6 \u201cRelay \u179a\u1794\u179f\u17cb\u1781\u17d2\u1789\u17bb\u17c6\u178f\u17c2\u1784\u178f\u17c2\u1794\u17be\u1780!\u201d<\/h3>\n<p>\u179a\u17c4\u1782\u179f\u1789\u17d2\u1789\u17b6\u17d6 Relay \u1785\u17bb\u1785\u1794\u17be\u1780\u1797\u17d2\u179b\u17b6\u1798\u17d7\u1793\u17c5\u1796\u17c1\u179b\u17a2\u17d2\u1793\u1780\u1794\u17be\u1780 Arduino \u1798\u17bb\u1793\u1796\u17c1\u179b\u1780\u17bc\u178a\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u17d4.<\/p>\n<p>\u1798\u17bc\u179b\u17a0\u17c1\u178f\u17bb\u17d6 \u1780\u17c6\u17a1\u17bb\u1784\u1796\u17c1\u179b Boot, Pin Arduino \u179f\u17d2\u1790\u17b7\u178f\u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784\u179f\u17d2\u1790\u17b6\u1793\u1797\u17b6\u1796\u1798\u17b7\u1793\u1794\u17b6\u1793\u1780\u17c6\u178e\u178f\u17cb (Floating) \u17d4 \u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be Pin Floating LOW, Relay \u1793\u17b9\u1784\u1794\u1789\u17d2\u1787\u17b6\u17d4.<\/p>\n<h4>\u1787\u17bd\u179f\u1787\u17bb\u179b\u17d6<\/h4>\n<pre><code>void setup() {<\/code><\/pre>\n<p>\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u179f\u17d2\u1790\u17b6\u1793\u1797\u17b6\u1796 Pin \u1798\u17bb\u1793\u1796\u17c1\u179b\u1780\u17c6\u178e\u178f\u17cb\u179c\u17b6\u1787\u17b6 OUTPUT \u1792\u17b6\u1793\u17b6\u1790\u17b6\u179c\u17b6\u1785\u17b6\u1794\u17cb\u1795\u17d2\u178f\u17be\u1798\u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784\u179f\u17d2\u1790\u17b6\u1793\u1797\u17b6\u1796\u1794\u17b7\u1791\u17d4.<\/p>\n<h3>\u1780\u17c6\u17a0\u17bb\u179f\u1791\u17b8 2\u17d6 \u201c\u179c\u17b6\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a... \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2\u1794\u1793\u17d2\u1791\u17b6\u1794\u17cb\u1798\u1780\u1794\u1789\u17d2\u1787\u17b6\u178a\u17c4\u1799\u1785\u17c3\u178a\u1793\u17d2\u1799\u201d<\/h3>\n<p>\u179a\u17c4\u1782\u179f\u1789\u17d2\u1789\u17b6\u17d6 Relay \u1796\u17c1\u179b\u1781\u17d2\u179b\u17c7\u1785\u17bb\u1785\u1794\u17be\u1780\u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b\u179c\u17b6\u1798\u17b7\u1793\u1782\u17bd\u179a \u1787\u17b6\u1796\u17b7\u179f\u17c1\u179f\u1787\u17b6\u1798\u17bd\u1799\u1781\u17d2\u179f\u17c2\u179c\u17c2\u1784 \u17ac\u1794\u179a\u17b7\u179f\u17d2\u1790\u17b6\u1793\u178a\u17c2\u179b\u1798\u17b6\u1793\u179f\u1798\u17d2\u179b\u17c1\u1784\u179a\u17c6\u1781\u17b6\u1793\u17d4.<\/p>\n<p>\u1798\u17bc\u179b\u17a0\u17c1\u178f\u17bb\u17d6 \u179f\u17c6\u17a1\u17c1\u1784\u179a\u17c6\u1781\u17b6\u1793\u17a2\u1782\u17d2\u1782\u17b7\u179f\u1793\u17b8 \u17ac\u179f\u17d2\u1790\u17b6\u1793\u1797\u17b6\u1796 Pin Floating \u17d4.<\/p>\n<h4>\u1787\u17bd\u179f\u1787\u17bb\u179b\u1791\u17b8 1 \u2013 \u1794\u1793\u17d2\u1790\u17c2\u1798 Resistor Pull-Up \u1781\u17b6\u1784\u1780\u17d2\u179a\u17c5\u17d6<\/h4>\n<p>\u1797\u17d2\u1787\u17b6\u1794\u17cb Resistor 10k\u03a9 \u179a\u179c\u17b6\u1784 Pin IN \u1793\u17b7\u1784 VCC \u17d4 \u1793\u17c1\u17c7\u179a\u1780\u17d2\u179f\u17b6 IN \u1791\u17b6\u1789 HIGH (Relay \u1794\u17b7\u1791) \u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b Arduino \u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u1798\u17b7\u1793\u1791\u17b6\u1789\u179c\u17b6 LOW \u1799\u17c9\u17b6\u1784\u179f\u1780\u1798\u17d2\u1798\u17d4.<\/p>\n<h4>\u1787\u17bd\u179f\u1787\u17bb\u179b\u1791\u17b8 2 \u2013 \u1794\u17be\u1780\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a Pull-Up \u1781\u17b6\u1784\u1780\u17d2\u1793\u17bb\u1784\u17d6<\/h4>\n<pre><code>void setup() {<\/code><\/pre>\n<h3>\u1780\u17c6\u17a0\u17bb\u179f\u1791\u17b8 3\u17d6 \u201cESP32 Relay \u1798\u17b7\u1793\u1785\u17bb\u1785\u1787\u17b6\u1794\u17cb\u179b\u17b6\u1794\u17cb\u201d<\/h3>\n<p>\u179a\u17c4\u1782\u179f\u1789\u17d2\u1789\u17b6\u17d6 Relay \u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u1796\u17c1\u179b\u1781\u17d2\u179b\u17c7 \u1794\u179a\u17b6\u1787\u17d0\u1799\u1796\u17c1\u179b\u1795\u17d2\u179f\u17c1\u1784\u1791\u17c0\u178f\u17d4 LED \u1793\u17c5\u179b\u17be Relay Board \u1794\u17c6\u1797\u17d2\u179b\u17ba \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2 Relay \u1798\u17b7\u1793\u1785\u17bb\u1785\u17d4.<\/p>\n<p>\u1798\u17bc\u179b\u17a0\u17c1\u178f\u17bb\u17d6 \u1785\u179a\u1793\u17d2\u178f\u1798\u17b7\u1793\u1782\u17d2\u179a\u1794\u17cb\u1782\u17d2\u179a\u17b6\u1793\u17cb\u1796\u17b8 3.3V GPIO \u178a\u17be\u1798\u17d2\u1794\u17b8\u1787\u17c6\u179a\u17bb\u1789 LED Optocoupler \u1799\u17c9\u17b6\u1784\u1782\u17bd\u179a\u17b1\u17d2\u1799\u1791\u17bb\u1780\u1785\u17b7\u178f\u17d2\u178f\u17d4.<\/p>\n<h4>\u1787\u17bd\u179f\u1787\u17bb\u179b \u2013 \u1794\u17d2\u179a\u17be\u1798\u17c9\u17bc\u178c\u17bb\u179b Relay 3.3V \u178a\u17c2\u179b\u17a7\u1791\u17d2\u1791\u17b7\u179f\u17d6<\/h4>\n<p>\u179a\u1780\u1798\u17be\u179b\u1798\u17c9\u17bc\u178c\u17bb\u179b Relay \u178a\u17c2\u179b\u178f\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793\u179c\u17b6\u1799\u178f\u1798\u17d2\u179b\u17c3\u1787\u17b6\u1796\u17b7\u179f\u17c1\u179f\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u179c\u17c9\u17bb\u179b\u1794\u1789\u17d2\u1787\u17b6 3.3V (\u1798\u17b7\u1793\u178f\u17d2\u179a\u17b9\u1798\u178f\u17c2\u1786\u1794\u1782\u17d2\u1793\u17b6 3.3V \u1794\u17c9\u17bb\u178e\u17d2\u178e\u17c4\u17c7\u1791\u17c1) \u17d4 \u1791\u17b6\u17c6\u1784\u1793\u17c1\u17c7\u1798\u17b6\u1793\u179f\u17c0\u1782\u17d2\u179c\u17b8 Optocoupler \u178a\u17c2\u179b\u1794\u17b6\u1793\u1792\u17d2\u179c\u17be\u17b1\u17d2\u1799\u1794\u17d2\u179a\u179f\u17be\u179a\u17a1\u17be\u1784\u1787\u17b6\u1798\u17bd\u1799\u1793\u17b9\u1784\u178f\u1798\u17d2\u179a\u17bc\u179c\u1780\u17b6\u179a\u179c\u17c9\u17bb\u179b Forward LED \u1791\u17b6\u1794\u1787\u17b6\u1784\u17d4.<\/p>\n<p>\u17ac \u2013 \u1795\u17d2\u178f\u179b\u17cb\u1790\u17b6\u1798\u1796\u179b VCC \u179a\u1794\u179f\u17cb\u1798\u17c9\u17bc\u178c\u17bb\u179b Relay \u1793\u17c5 5V\u17d6<\/p>\n<p>\u1791\u17c4\u17c7\u1794\u17b8\u1787\u17b6 ESP32 \u1782\u17ba 3.3V \u1780\u17cf\u178a\u17c4\u1799 \u17a2\u17d2\u1793\u1780\u17a2\u17b6\u1785\u1795\u17d2\u178f\u179b\u17cb\u1790\u17b6\u1798\u1796\u179b VCC \u179a\u1794\u179f\u17cb\u1798\u17c9\u17bc\u178c\u17bb\u179b Relay \u1796\u17b8 5V (Pin 5V \u179a\u1794\u179f\u17cb ESP32 \u17ac\u1780\u17b6\u179a\u1795\u17d2\u1782\u178f\u17cb\u1795\u17d2\u1782\u1784\u17cb\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c5) \u1781\u178e\u17c8\u1796\u17c1\u179b\u178a\u17c2\u179b ESP32 GPIO \u179b\u17b7\u1785\u1785\u179a\u1793\u17d2\u178f\u1791\u17c5 GND \u17d4 \u1793\u17c1\u17c7\u1795\u17d2\u178f\u179b\u17cb\u1793\u17bc\u179c\u1785\u179a\u1793\u17d2\u178f LED \u1781\u17d2\u179b\u17b6\u17c6\u1784\u1787\u17b6\u1784\u178f\u17b6\u1798\u179a\u1799\u17c8 Optocoupler \u17d4.<\/p>\n<h3>\u1780\u17c6\u17a0\u17bb\u179f\u1791\u17b8 4\u17d6 \u201c\u1781\u17d2\u1789\u17bb\u17c6\u1780\u17c6\u178e\u178f\u17cb Jumper \u1781\u17bb\u179f\u201d<\/h3>\n<p>\u179a\u17c4\u1782\u179f\u1789\u17d2\u1789\u17b6\u17d6 \u1791\u1784\u17d2\u179c\u17be\u179a\u1794\u179f\u17cb Relay \u1795\u17d2\u1791\u17bb\u1799\u1796\u17b8\u17a2\u17d2\u179c\u17b8\u178a\u17c2\u179b\u1780\u17bc\u178a\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u179a\u17c6\u1796\u17b9\u1784\u1791\u17bb\u1780\u17d4.<\/p>\n<p>\u1798\u17bc\u179b\u17a0\u17c1\u178f\u17bb\u17d6 Relay module \u1798\u17b6\u1793 jumper \u1780\u17c6\u178e\u178f\u17cb\u1791\u17c5 high-level trigger mode\u17d4.<\/p>\n<h4>\u1787\u17bd\u179f\u1787\u17bb\u179b\u17d6<\/h4>\n<p>\u179a\u1780\u1798\u17be\u179b jumper 3-pin \u1793\u17c5\u1780\u17d2\u1794\u17c2\u179a screw terminals \u178a\u17c2\u179b\u1787\u17b6\u1792\u1798\u17d2\u1798\u178f\u17b6\u1798\u17b6\u1793\u179f\u17d2\u179b\u17b6\u1780\u179f\u1789\u17d2\u1789\u17b6\u17d6<\/p>\n<ul>\n<li>H (High level trigger)<\/li>\n<li>COM (Common)<\/li>\n<li>L (Low level trigger)<\/li>\n<\/ul>\n<p>\u1795\u17d2\u179b\u17b6\u179f\u17cb\u1791\u17b8 jumper \u178a\u17be\u1798\u17d2\u1794\u17b8\u1797\u17d2\u1787\u17b6\u1794\u17cb COM \u1793\u17b7\u1784 L \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb low-level trigger mode\u17d4.<\/p>\n<p>\u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be\u1798\u17b7\u1793\u1798\u17b6\u1793 Jumper\u17d6 Relay modules \u1781\u17d2\u179b\u17c7\u178f\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793\u1787\u17bd\u179f\u1787\u17bb\u179b\u1793\u17c5 low-level \u178f\u17c2\u1794\u17c9\u17bb\u178e\u17d2\u178e\u17c4\u17c7\u17d4 \u1796\u17b7\u1793\u17b7\u178f\u17d2\u1799\u1798\u17be\u179b\u1780\u17b6\u179a\u1796\u17b7\u1796\u178e\u17cc\u1793\u17b6\u1795\u179b\u17b7\u178f\u1795\u179b \u17ac\u179f\u17b6\u1780\u179b\u17d2\u1794\u1784\u17d6 \u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be LOW \u1794\u17be\u1780\u179c\u17b6 \u1793\u17c4\u17c7\u1782\u17ba\u1787\u17b6 low-level trigger\u17d4.<\/p>\n<h3>\u1780\u17c6\u17a0\u17bb\u179f #5\u17d6 \u201cRelay \u1785\u17bb\u1785 \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2 Load \u1798\u17b7\u1793\u1794\u17be\u1780\u201d<\/h3>\n<p>\u179a\u17c4\u1782\u179f\u1789\u17d2\u1789\u17b6\u17d6 \u17a2\u17d2\u1793\u1780\u17ae relay \u1785\u17bb\u1785, LED \u1794\u17c6\u1797\u17d2\u179b\u17ba, \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2\u1785\u1784\u17d2\u1780\u17c0\u1784\/\u1798\u17c9\u17bc\u1791\u17d0\u179a\/\u1798\u17c9\u17b6\u179f\u17ca\u17b8\u1793\u1794\u17bc\u1798\u1791\u17b9\u1780\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u1798\u17b7\u1793\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u17d4.<\/p>\n<p>\u1798\u17bc\u179b\u17a0\u17c1\u178f\u17bb\u17d6 \u1793\u17c1\u17c7\u1798\u17b7\u1793\u1798\u17c2\u1793\u1787\u17b6\u1794\u1789\u17d2\u17a0\u17b6 trigger \u1791\u17c1 \u2014 \u179c\u17b6\u1787\u17b6\u1794\u1789\u17d2\u17a0\u17b6\u1781\u17d2\u179f\u17c2\u1797\u17d2\u179b\u17be\u1784\u1793\u17c5\u1795\u17d2\u1793\u17c2\u1780 high-voltage\u17d4.<\/p>\n<h4>\u1787\u17bd\u179f\u1787\u17bb\u179b \u2013 \u1796\u17b7\u1793\u17b7\u178f\u17d2\u1799\u1798\u17be\u179b Load Wiring\u17d6<\/h4>\n<p>COM (Common) \u1797\u17d2\u1787\u17b6\u1794\u17cb\u1791\u17c5\u1794\u17d2\u179a\u1797\u1796\u1790\u17b6\u1798\u1796\u179b (\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd 12V+ \u17ac AC line)<\/p>\n<p>NO (Normally Open) \u1797\u17d2\u1787\u17b6\u1794\u17cb\u1791\u17c5 load positive terminal<\/p>\n<p>Load negative \u178f\u17d2\u179a\u179b\u1794\u17cb\u1791\u17c5 power source negative<\/p>\n<h4>\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb AC loads (\u178a\u17bc\u1785\u1787\u17b6\u1785\u1784\u17d2\u1780\u17c0\u1784)\u17d6<\/h4>\n<ul>\n<li>COM \u1791\u17c5 AC hot wire<\/li>\n<li>NO \u1791\u17c5\u1785\u1784\u17d2\u1780\u17c0\u1784<\/li>\n<li>\u1785\u1784\u17d2\u1780\u17c0\u1784 terminal \u1795\u17d2\u179f\u17c1\u1784\u1791\u17c0\u178f\u1791\u17c5 AC neutral<\/li>\n<\/ul>\n<h3>\u179f\u1798\u17d2\u1782\u17b6\u179b\u17cb\u179f\u17bb\u179c\u178f\u17d2\u1790\u17b7\u1797\u17b6\u1796\u179f\u17c6\u1781\u17b6\u1793\u17cb\u17d6<\/h3>\n<p>\u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be\u1792\u17d2\u179c\u17be\u1780\u17b6\u179a\u1787\u17b6\u1798\u17bd\u1799 AC mains voltage (110V\/220V), \u1794\u17b7\u1791\u1790\u17b6\u1798\u1796\u179b\u1793\u17c5 breaker \u1798\u17bb\u1793\u1796\u17c1\u179b wiring\u17d4 \u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be\u17a2\u17d2\u1793\u1780\u1798\u17b7\u1793\u1798\u17b6\u1793\u1795\u17b6\u179f\u17bb\u1780\u1797\u17b6\u1796\u1787\u17b6\u1798\u17bd\u1799 AC wiring, \u1794\u17d2\u179a\u17be electrician \u178a\u17c2\u179b\u1798\u17b6\u1793\u1782\u17bb\u178e\u1797\u17b6\u1796\u17d4.<\/p>\n<h2>Practical Applications: \u1796\u17c1\u179b\u178a\u17c2\u179b\u17a2\u17d2\u1793\u1780\u1796\u17b7\u178f\u1787\u17b6\u178f\u17d2\u179a\u17bc\u179c\u1780\u17b6\u179a Low Level Trigger Relays<\/h2>\n<h3>1. Home Automation Projects<\/h3>\n<p>\u179f\u17d2\u1790\u17b6\u1793\u1797\u17b6\u1796\u17d6 ESP32-controlled smart outlet \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1785\u1784\u17d2\u1780\u17c0\u1784\u17d4.<\/p>\n<p>\u17a0\u17c1\u178f\u17bb\u17a2\u17d2\u179c\u17b8 Low Level Trigger\u17d6<\/p>\n<ul>\n<li>ESP32 \u1782\u17ba 3.3V (\u1797\u17b6\u1796\u1786\u1794\u1782\u17d2\u1793\u17b6\u1794\u17d2\u179a\u179f\u17be\u179a\u1787\u17b6\u1784)<\/li>\n<li>\u1785\u1784\u17d2\u1780\u17c0\u1784\u1782\u17bd\u179a\u178f\u17c2\u1794\u17b7\u1791\u178f\u17b6\u1798\u179b\u17c6\u1793\u17b6\u17c6\u178a\u17be\u1798 (fail-safe)<\/li>\n<li>Random triggers \u1780\u17c6\u17a1\u17bb\u1784\u1796\u17c1\u179b WiFi reconnects \u1793\u17b9\u1784\u179a\u17c6\u1781\u17b6\u1793<\/li>\n<\/ul>\n<h4>Implementation:<\/h4>\n<pre><code>const int relayPin = 23;<\/code><\/pre>\n<h3>2. Garden Irrigation Controller<\/h3>\n<p>\u179f\u17d2\u1790\u17b6\u1793\u1797\u17b6\u1796\u17d6 Arduino-timed water pump \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb garden beds\u17d4.<\/p>\n<p>\u17a0\u17c1\u178f\u17bb\u17a2\u17d2\u179c\u17b8 Low Level Trigger\u17d6<\/p>\n<ul>\n<li>Pump \u1794\u17b7\u1791\u178f\u17b6\u1798\u179b\u17c6\u1793\u17b6\u17c6\u178a\u17be\u1798 (\u1780\u17b6\u179a\u1796\u17b6\u179a\u1780\u17b6\u179a\u1787\u1793\u17cb\u179b\u17b7\u1785\u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be Arduino crashes)<\/li>\n<li>\u1781\u17d2\u179f\u17c2\u179c\u17c2\u1784\u1791\u17c5 outdoor relay (noise immunity \u1787\u17b6\u1798\u17bd\u1799 pull-up)<\/li>\n<li>Fail-safe: \u1781\u17d2\u179f\u17c2\u1781\u17bc\u1785 = \u1782\u17d2\u1798\u17b6\u1793\u1791\u17b9\u1780 = \u179a\u17bb\u1780\u17d2\u1781\u1787\u17b6\u178f\u17b7\u179a\u179f\u17cb\u179a\u17b6\u1793\u1798\u17b6\u1793\u1787\u17b8\u179c\u17b7\u178f<\/li>\n<\/ul>\n<h4>Implementation:<\/h4>\n<pre><code>void waterGarden(int minutes) {<\/code><\/pre>\n<h3>3. 3D Printer Power Management<\/h3>\n<p>\u179f\u17d2\u1790\u17b6\u1793\u1797\u17b6\u1796\u17d6 \u1794\u17be\u1780 printer \u178a\u17c4\u1799\u179f\u17d2\u179c\u17d0\u1799\u1794\u17d2\u179a\u179c\u178f\u17d2\u178f\u17b7 \u1798\u17bb\u1793\u1796\u17c1\u179b print jobs, \u1794\u17b7\u1791\u1793\u17c5\u1796\u17c1\u179b\u1794\u1789\u17d2\u1785\u1794\u17cb\u17d4.<\/p>\n<p>\u17a0\u17c1\u178f\u17bb\u17a2\u17d2\u179c\u17b8 Low Level Trigger\u17d6<\/p>\n<ul>\n<li>Printer \u1794\u17b7\u1791\u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b\u1798\u17b7\u1793 printing (\u179f\u1793\u17d2\u179f\u17c6\u179f\u17c6\u1785\u17c3\u1790\u17b6\u1798\u1796\u179b, \u1780\u17b6\u178f\u17cb\u1794\u1793\u17d2\u1790\u1799\u17a0\u17b6\u1793\u17b7\u1797\u17d0\u1799\u1793\u17c3\u1780\u17b6\u179a\u1786\u17c1\u17c7)<\/li>\n<li>OctoPrint (Raspberry Pi) \u1794\u17d2\u179a\u17be 3.3V GPIO<\/li>\n<li>Fail-safe: system crash = printer \u1793\u17c5\u178f\u17c2\u1794\u17b7\u1791<\/li>\n<\/ul>\n<h3>4. Aquarium Controller<\/h3>\n<p>\u179f\u17d2\u1790\u17b6\u1793\u1797\u17b6\u1796\u17d6 Temperature-based heater control \u1787\u17b6\u1798\u17bd\u1799 Arduino\u17d4.<\/p>\n<p>\u17a0\u17c1\u178f\u17bb\u17a2\u17d2\u179c\u17b8 Low Level Trigger\u17d6<\/p>\n<ul>\n<li>Heater \u1794\u17b7\u1791\u178f\u17b6\u1798\u179b\u17c6\u1793\u17b6\u17c6\u178a\u17be\u1798 (\u1780\u17b6\u179a\u1796\u17b6\u179a\u1780\u17bb\u17c6\u17b1\u17d2\u1799\u178f\u17d2\u179a\u17b8\u17a1\u17be\u1784\u1780\u17c6\u178a\u17c5 \u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be\u179f\u17c1\u1793\u179f\u17d0\u179a\u1781\u17bc\u1785)<\/li>\n<li>5V Arduino \u17ac 3.3V ESP32 compatibility<\/li>\n<li>Multiple relays (lights, filter, heater) \u1791\u17b6\u17c6\u1784\u17a2\u179f\u17cb\u178f\u17d2\u179a\u17bc\u179c\u1780\u17b6\u179a coordinated fail-safe behavior<\/li>\n<\/ul>\n<h2>\u17a2\u17d2\u179c\u17b8\u178a\u17c2\u179b\u1793\u17c1\u17c7\u1798\u17b6\u1793\u1793\u17d0\u1799\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1782\u1798\u17d2\u179a\u17c4\u1784\u1794\u1793\u17d2\u1791\u17b6\u1794\u17cb\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780<\/h2>\n<p>Low level trigger relays \u1798\u17b7\u1793\u1785\u1798\u17d2\u179b\u17c2\u1780\u1791\u17c1 \u2014 \u1796\u17bd\u1780\u179c\u17b6\u1787\u17b6\u179f\u17d2\u178f\u1784\u17cb\u178a\u17b6\u179a\u17d4 \u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b\u17a2\u17d2\u1793\u1780\u1794\u1789\u17d2\u1785\u17bc\u179b logic (\u201cLOW = ON, HIGH = OFF\u201d) \u1796\u17bd\u1780\u179c\u17b6\u1780\u17d2\u179b\u17b6\u1799\u1787\u17b6\u1792\u1798\u17d2\u1798\u1787\u17b6\u178f\u17b7\u1791\u17b8\u1796\u17b8\u179a\u17d4 \u17a0\u17be\u1799\u17a2\u178f\u17d2\u1790\u1794\u17d2\u179a\u1799\u17c4\u1787\u1793\u17cd \u2014 fail-safe behavior, \u1797\u17b6\u1796\u1786\u1794\u1782\u17d2\u1793\u17b6\u1794\u17d2\u179a\u179f\u17be\u179a\u1787\u17b6\u1784, noise immunity \u2014 \u1792\u17d2\u179c\u17be\u17b1\u17d2\u1799\u1796\u17bd\u1780\u179c\u17b6\u1787\u17b6\u1787\u1798\u17d2\u179a\u17be\u179f\u178a\u17cf\u1786\u17d2\u179b\u17b6\u178f\u179c\u17c3\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1782\u1798\u17d2\u179a\u17c4\u1784 Arduino \u1793\u17b7\u1784 ESP32 \u1797\u17b6\u1782\u1785\u17d2\u179a\u17be\u1793\u17d4.<\/p>\n<h3>Quick Decision Guide:<\/h3>\n<h4>\u1794\u17d2\u179a\u17be Low Level Trigger Relay \u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be\u17d6<\/h4>\n<ul>\n<li>\u2705 \u17a2\u17d2\u1793\u1780\u1780\u17c6\u1796\u17bb\u1784\u1794\u17d2\u179a\u17be ESP32, ESP8266, \u17ac microcontroller 3.3V \u178e\u17b6\u1798\u17bd\u1799<\/li>\n<li>\u2705 Load \u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u1782\u17bd\u179a\u178f\u17c2\u1794\u17b7\u1791\u178f\u17b6\u1798\u179b\u17c6\u1793\u17b6\u17c6\u178a\u17be\u1798 (pumps, heaters, alarms)<\/li>\n<li>\u2705 \u17a2\u17d2\u1793\u1780\u1785\u1784\u17cb\u1794\u17b6\u1793 fail-safe behavior (wire break = relay OFF)<\/li>\n<li>\u2705 \u17a2\u17d2\u1793\u1780\u1780\u17c6\u1796\u17bb\u1784\u179f\u17b6\u1784\u179f\u1784\u17cb\u1782\u1798\u17d2\u179a\u17c4\u1784 beginner<\/li>\n<li>\u2705 \u17a2\u17d2\u1793\u1780\u17b1\u17d2\u1799\u178f\u1798\u17d2\u179b\u17c3\u1797\u17b6\u1796\u1786\u1794\u1782\u17d2\u1793\u17b6\u179b\u17be\u1780\u17b6\u179a\u1794\u17d2\u179a\u1799\u17bb\u1791\u17d2\u1792\u1787\u17b6\u1798\u17bd\u1799 logic levels<\/li>\n<\/ul>\n<h4>\u1794\u17d2\u179a\u17be High Level Trigger Relay \u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be\u17d6<\/h4>\n<ul>\n<li>\u2705 application \u1787\u17b6\u1780\u17cb\u179b\u17b6\u1780\u17cb\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u178f\u1798\u17d2\u179a\u17bc\u179c\u17b1\u17d2\u1799 relay \u1794\u17be\u1780\u1780\u17c6\u17a1\u17bb\u1784\u1796\u17c1\u179b microcontroller boot<\/li>\n<li>\u2705 \u17a2\u17d2\u1793\u1780\u1780\u17c6\u1796\u17bb\u1784 interfacing \u1787\u17b6\u1798\u17bd\u1799 industrial control systems (PLCs)<\/li>\n<li>\u2705 \u17a2\u17d2\u1793\u1780\u1798\u17b6\u1793\u17a0\u17c1\u178f\u17bb\u1795\u179b\u1787\u17b6\u1780\u17cb\u179b\u17b6\u1780\u17cb (\u17a0\u17be\u1799\u17a2\u17d2\u1793\u1780\u178a\u17b9\u1784\u1790\u17b6\u179c\u17b6\u1787\u17b6\u17a2\u17d2\u179c\u17b8)<\/li>\n<\/ul>\n<h2>\u1782\u17b6\u17c6\u1791\u17d2\u179a\u1791\u17b7\u1796\u17d2\u179c\u17d6<\/h2>\n<p>\u1793\u17c5\u1796\u17c1\u179b\u1791\u17b7\u1789 relay modules, \u179a\u1780\u1798\u17be\u179b modules \u178a\u17c2\u179b\u1782\u17b6\u17c6\u1791\u17d2\u179a\u1791\u17b6\u17c6\u1784 high \u1793\u17b7\u1784 low level triggering \u1787\u17b6\u1798\u17bd\u1799 jumper\u17d4 \u1793\u17c1\u17c7\u1795\u17d2\u178f\u179b\u17cb\u17b1\u17d2\u1799\u17a2\u17d2\u1793\u1780\u1793\u17bc\u179c\u1797\u17b6\u1796\u1794\u178f\u17cb\u1794\u17c2\u1793\u1780\u17d2\u1793\u17bb\u1784\u1780\u17b6\u179a\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f mode \u178a\u17cf\u179b\u17d2\u17a2\u1794\u17c6\u1795\u17bb\u178f\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1782\u1798\u17d2\u179a\u17c4\u1784\u1793\u17b8\u1798\u17bd\u1799\u17d7\u17d4.<\/p>\n<h2>\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f Relay Module \u178f\u17d2\u179a\u17b9\u1798\u178f\u17d2\u179a\u17bc\u179c<\/h2>\n<p>\u1793\u17c5\u1796\u17c1\u179b\u1791\u17b7\u1789 relay modules, \u1793\u17c1\u17c7\u1787\u17b6\u17a2\u17d2\u179c\u17b8\u178a\u17c2\u179b\u178f\u17d2\u179a\u17bc\u179c\u1796\u17b7\u1793\u17b7\u178f\u17d2\u1799\u17d6<\/p>\n<h3>\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb Arduino Uno \/ Mega (5V):<\/h3>\n<ul>\n<li>Operating voltage: 5V DC<\/li>\n<li>Trigger voltage: 5V compatible<\/li>\n<li>\u1785\u179a\u1793\u17d2\u178f\u1794\u1789\u17d2\u1786\u17c1\u17c7: &lt;15mA (\u1798\u17d2\u1787\u17bb\u179b Arduino \u17a2\u17b6\u1785\u1795\u17d2\u1782\u178f\u17cb\u1795\u17d2\u1782\u1784\u17cb\u1785\u179a\u1793\u17d2\u178f\u17a2\u178f\u17b7\u1794\u179a\u1798\u17b6 20-40mA)<\/li>\n<li>\u1797\u17b6\u1796\u17af\u1780\u17c4 Optocoupler: \u1798\u17b6\u1793 (PC817 \u17ac\u179f\u17d2\u179a\u178a\u17c0\u1784\u1782\u17d2\u1793\u17b6)<\/li>\n<\/ul>\n<h3>\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb ESP32 \/ ESP8266 (3.3V):<\/h3>\n<ul>\n<li>\u179c\u17c9\u17bb\u179b\u1794\u17d2\u179a\u178f\u17b7\u1794\u178f\u17d2\u178f\u17b7\u1780\u17b6\u179a: 5V DC (\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1790\u17b6\u1798\u1796\u179b\u1781 coil relay)<\/li>\n<li>\u179c\u17c9\u17bb\u179b\u1794\u1789\u17d2\u1786\u17c1\u17c7: \u1786\u1794\u1782\u17d2\u1793\u17b6 3.3V \u17ac \u179a\u1794\u17c0\u1794\u1794\u1789\u17d2\u1786\u17c1\u17c7\u1780\u1798\u17d2\u179a\u17b7\u178f\u1791\u17b6\u1794<\/li>\n<li>\u1785\u179a\u1793\u17d2\u178f\u1794\u1789\u17d2\u1786\u17c1\u17c7: &lt;12mA (\u1798\u17d2\u1787\u17bb\u179b ESP32 \u17a2\u17b6\u1785\u1795\u17d2\u1782\u178f\u17cb\u1795\u17d2\u1782\u1784\u17cb\u1785\u179a\u1793\u17d2\u178f\u17a2\u178f\u17b7\u1794\u179a\u1798\u17b6 12mA)<\/li>\n<li>\u1797\u17b6\u1796\u17af\u1780\u17c4 Optocoupler: \u178f\u1798\u17d2\u179a\u17bc\u179c\u17b2\u17d2\u1799\u1798\u17b6\u1793<\/li>\n<li>VCC\/JD-VCC \u178a\u17b6\u1785\u17cb\u178a\u17c4\u1799\u17a1\u17c2\u1780: \u178f\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793\u1782\u17c1\u1796\u17c1\u1789\u1785\u17b7\u178f\u17d2\u178f<\/li>\n<\/ul>\n<h3>\u179b\u1780\u17d2\u1781\u178e\u17c8\u1794\u1785\u17d2\u1785\u17c1\u1780\u1791\u17c1\u179f\u1791\u17bc\u1791\u17c5:<\/h3>\n<ul>\n<li>\u1780\u1798\u17d2\u179a\u17b7\u178f\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784: 10A @ 250VAC \u17ac 10A @ 30VDC (\u1792\u1798\u17d2\u1798\u178f\u17b6)<\/li>\n<li>\u1785\u17c6\u1793\u17bd\u1793\u1786\u17b6\u1793\u17c2\u179b: 1, 2, 4, 8 (\u1795\u17d2\u17a2\u17c2\u1780\u179b\u17be\u178f\u1798\u17d2\u179a\u17bc\u179c\u1780\u17b6\u179a\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780)<\/li>\n<li>\u1780\u17b6\u179a\u1798\u17c9\u17c4\u1793: \u179f\u17d2\u1790\u17b6\u1793\u17b8\u1799\u179c\u17b8\u179f \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1781\u17d2\u179f\u17c2\u1797\u17d2\u179b\u17be\u1784\u1784\u17b6\u1799\u179f\u17d2\u179a\u17bd\u179b<\/li>\n<li>\u179f\u17bc\u1785\u1793\u17b6\u1780\u179a: LED \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1790\u17b6\u1798\u1796\u179b \u1793\u17b7\u1784\u179f\u17d2\u1790\u17b6\u1793\u1797\u17b6\u1796 relay<\/li>\n<\/ul>\n<p>VIOX Electric \u1795\u17d2\u178f\u179b\u17cb\u1787\u17bc\u1793\u1793\u17bc\u179c\u1798\u17c9\u17bc\u178c\u17bb\u179b relay \u1796\u17c1\u1789\u179b\u17c1\u1789\u178a\u17c2\u179b\u1794\u17b6\u1793\u1792\u17d2\u179c\u17be\u17b1\u17d2\u1799\u1794\u17d2\u179a\u179f\u17be\u179a\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8 Arduino, ESP32 \u1793\u17b7\u1784\u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8\u1782\u17d2\u179a\u1794\u17cb\u1782\u17d2\u179a\u1784\u17a7\u179f\u17d2\u179f\u17b6\u17a0\u1780\u1798\u17d2\u1798\u17d4 \u1798\u17c9\u17bc\u178c\u17bb\u179b relay \u179a\u1794\u179f\u17cb\u1799\u17be\u1784\u1798\u17b6\u1793\u179b\u1780\u17d2\u1781\u178e\u17c8\u1796\u17b7\u179f\u17c1\u179f:<\/p>\n<ul>\n<li>\u1797\u17b6\u1796\u1786\u1794\u1782\u17d2\u1793\u17b6 3.3V\/5V \u1796\u17b7\u178f\u1794\u17d2\u179a\u17b6\u1780\u178a \u1787\u17b6\u1798\u17bd\u1799\u1793\u17b9\u1784\u1780\u17b6\u179a\u179a\u1785\u1793\u17b6\u1794\u1789\u17d2\u1786\u17c1\u17c7\u1780\u1798\u17d2\u179a\u17b7\u178f\u1791\u17b6\u1794<\/li>\n<li>\u1797\u17b6\u1796\u17af\u1780\u17c4 optocoupler \u178a\u17c2\u179b\u1798\u17b6\u1793\u1782\u17bb\u178e\u1797\u17b6\u1796\u1781\u17d2\u1796\u179f\u17cb (PC817)<\/li>\n<li>\u1780\u17b6\u179a\u178f\u1797\u17d2\u1787\u17b6\u1794\u17cb\u179f\u17d2\u1790\u17b6\u1793\u17b8\u1799\u179c\u17b8\u179f \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1781\u17d2\u179f\u17c2\u1797\u17d2\u179b\u17be\u1784\u178a\u17c2\u179b\u1798\u17b6\u1793\u179f\u17bb\u179c\u178f\u17d2\u1790\u17b7\u1797\u17b6\u1796<\/li>\n<li>\u179f\u17bc\u1785\u1793\u17b6\u1780\u179a LED \u1796\u17b8\u179a (\u1790\u17b6\u1798\u1796\u179b + \u179f\u17d2\u1790\u17b6\u1793\u1797\u17b6\u1796 relay)<\/li>\n<li>\u179a\u1794\u17c0\u1794\u1794\u1789\u17d2\u1786\u17c1\u17c7\u178a\u17c2\u179b\u17a2\u17b6\u1785\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u1794\u17b6\u1793 (jumper \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1780\u1798\u17d2\u179a\u17b7\u178f\u1781\u17d2\u1796\u179f\u17cb\/\u1791\u17b6\u1794)<\/li>\n<\/ul>\n<p>\u179a\u1780\u1798\u17be\u179b\u1798\u17c9\u17bc\u178c\u17bb\u179b VIOX Relay \u2192 \u17ac\u1791\u17b6\u1780\u17cb\u1791\u1784\u1780\u17d2\u179a\u17bb\u1798\u1794\u1785\u17d2\u1785\u17c1\u1780\u1791\u17c1\u179f\u179a\u1794\u179f\u17cb\u1799\u17be\u1784 \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u17a2\u1793\u17bb\u179f\u17b6\u179f\u1793\u17cd\u1787\u17b6\u1780\u17cb\u179b\u17b6\u1780\u17cb\u1793\u17c3\u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8\u17d4.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction: The Click That Never Came 2:47 AM. You&#8217;ve been at this for three hours. Your Arduino project looks perfect. The relay module sits there on your breadboard, wired exactly like the tutorial showed. You&#8217;ve triple-checked: VCC to 5V, GND to GND, IN1 to digital pin 7. The code compiles. You upload it. Pin 7 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":19565,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-19558","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/test.viox.com\/km\/wp-json\/wp\/v2\/posts\/19558","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.viox.com\/km\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.viox.com\/km\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.viox.com\/km\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test.viox.com\/km\/wp-json\/wp\/v2\/comments?post=19558"}],"version-history":[{"count":4,"href":"https:\/\/test.viox.com\/km\/wp-json\/wp\/v2\/posts\/19558\/revisions"}],"predecessor-version":[{"id":19566,"href":"https:\/\/test.viox.com\/km\/wp-json\/wp\/v2\/posts\/19558\/revisions\/19566"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/km\/wp-json\/wp\/v2\/media\/19565"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/km\/wp-json\/wp\/v2\/media?parent=19558"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/km\/wp-json\/wp\/v2\/categories?post=19558"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/km\/wp-json\/wp\/v2\/tags?post=19558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}