{"product_id":"1-channel-relay-module-optocoupler-isolation-5v-12v-level-trigger","title":"1 Channel Relay Module Optocoupler Isolation 5V 12V Trigger","description":"\u003cp\u003eUpgrade your electronics projects with the \u003cstrong\u003e1 Channel Relay Module with Optocoupler Isolation\u003c\/strong\u003e — a compact, reliable relay board designed for seamless integration with microcontrollers, automation systems, and DIY electronics builds. Available in 5V and 12V versions, this module delivers clean signal switching with built-in optocoupler isolation to protect your control circuitry.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptocoupler Isolation:\u003c\/strong\u003e Built-in optocoupler separates the control circuit from the load circuit, protecting your microcontroller or logic board from voltage spikes and interference.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5V \u0026amp; 12V Compatible:\u003c\/strong\u003e Choose the version that matches your project's power supply — the GND and VCC pin headers correspond to the negative and positive terminals of your chosen supply voltage.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Level Trigger:\u003c\/strong\u003e The relay activates when the control port receives a high-level signal, making integration with Arduino, Raspberry Pi, and other microcontrollers straightforward.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e Measures approximately 4.2 × 1.7 × 1.9 cm (1.65 × 0.67 × 0.75 in) — small enough to fit into tight enclosures without sacrificing functionality.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle-Channel Design:\u003c\/strong\u003e Controls one independent relay output — ideal for switching lights, motors, solenoids, or other electrical loads.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy Plug-and-Play Setup:\u003c\/strong\u003e Pin headers are clearly labeled for quick wiring. No soldering required for standard connections.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Built with quality components for consistent, repeatable switching performance in automation and control applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChannels:\u003c\/strong\u003e 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e 5V or 12V (select your version)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrigger Type:\u003c\/strong\u003e High-level trigger\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIsolation:\u003c\/strong\u003e Optocoupler (signal\/load circuit separation)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e ~4.2 × 1.7 × 1.9 cm \/ 1.65 × 0.67 × 0.75 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible With:\u003c\/strong\u003e Arduino, Raspberry Pi, and most 5V\/12V microcontroller platforms\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePerfect For\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHome automation and smart device projects\u003c\/li\u003e\n  \u003cli\u003eArduino and Raspberry Pi control circuits\u003c\/li\u003e\n  \u003cli\u003eIndustrial control and regulation systems\u003c\/li\u003e\n  \u003cli\u003eDIY electronics, robotics, and maker projects\u003c\/li\u003e\n  \u003cli\u003eSwitching AC\/DC loads safely from low-voltage logic signals\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor guidance on electrical safety when working with relay modules and switching circuits, refer to resources from the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eU.S. Occupational Safety and Health Administration (OSHA) — Electrical Safety\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does the optocoupler isolation do in this relay module?\u003c\/h4\u003e\n\u003cp\u003eA: The optocoupler isolation electrically separates your control circuit (e.g., a microcontroller like Arduino) from the relay's load-switching circuit. This prevents high-voltage spikes or back-EMF from the switched load from damaging your logic board, making the 1 Channel Relay Module with Optocoupler Isolation much safer for use in mixed-voltage projects.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the difference between the 5V and 12V versions of this relay module?\u003c\/h4\u003e\n\u003cp\u003eA: The difference is in the coil operating voltage. The 5V version requires a 5V power supply connected to the GND and VCC pin headers, while the 12V version requires a 12V supply. Both versions feature the same high-level trigger logic and optocoupler isolation — choose based on the power supply available in your project.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this relay module compatible with Arduino and Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The 1 Channel Relay Module is compatible with Arduino, Raspberry Pi, and most standard microcontroller development boards. The high-level trigger design means the relay activates when the control pin receives a HIGH signal from your microcontroller's GPIO output, making wiring and programming straightforward.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What types of loads can I switch with this relay module?\u003c\/h4\u003e\n\u003cp\u003eA: This relay module is suitable for switching a wide range of electrical loads, including lights, fans, motors, solenoids, and other AC or DC devices — within the relay's rated specifications. Always ensure the load current and voltage do not exceed the relay's rated capacity for safe and reliable operation.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does the optocoupler isolation do in this relay module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The optocoupler isolation electrically separates your control circuit (e.g., a microcontroller like Arduino) from the relay's load-switching circuit. 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