{"product_id":"5v-12v-relay-module-optocoupler-isolation-1-channel-microcontroller","title":"5V 12V Relay Module Optocoupler Isolation – 1 Channel Board","description":"\n\u003ch2\u003e1-Channel 5V\/12V Optocoupler Relay Module – Microcontroller Expansion Board\u003c\/h2\u003e\n\u003cp\u003eTake your electronics projects to the next level with this compact \u003cstrong\u003e1-channel relay module\u003c\/strong\u003e featuring built-in optocoupler isolation. Compatible with both \u003cstrong\u003e5V and 12V\u003c\/strong\u003e trigger voltages, this relay board is ideal for Arduino, Raspberry Pi, ESP8266, ESP32, and other popular microcontrollers. Whether you're building home automation systems, robotics, or DIY electronics prototypes, this module delivers reliable switching performance in a small, easy-to-integrate package.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptocoupler Isolation:\u003c\/strong\u003e Keeps your microcontroller electrically isolated from the relay load circuit, protecting sensitive components from voltage spikes and noise.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Voltage Compatibility:\u003c\/strong\u003e Supports both 5V and 12V trigger signals, making it versatile across a wide range of microcontroller platforms and power supplies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLevel Trigger Support:\u003c\/strong\u003e Compatible with both high-level and low-level trigger configurations for maximum flexibility in circuit design.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1-Channel Design:\u003c\/strong\u003e Clean, single-relay layout simplifies wiring and is perfect for compact or space-constrained projects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard Relay Output:\u003c\/strong\u003e Provides Normally Open (NO), Normally Closed (NC), and Common (COM) terminals for versatile switching configurations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy Integration:\u003c\/strong\u003e Standard pin spacing and clear onboard labeling make wiring straightforward, even for beginners.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLED Indicator:\u003c\/strong\u003e Onboard LED shows relay status at a glance, simplifying debugging and testing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Channels:\u003c\/strong\u003e 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrigger Voltage:\u003c\/strong\u003e 5V \/ 12V DC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIsolation Type:\u003c\/strong\u003e Optocoupler\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrigger Type:\u003c\/strong\u003e High \/ Low Level\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelay Output:\u003c\/strong\u003e NO \/ NC \/ COM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Concern Chemicals:\u003c\/strong\u003e None\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible With\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino (Uno, Mega, Nano, etc.)\u003c\/li\u003e\n  \u003cli\u003eRaspberry Pi\u003c\/li\u003e\n  \u003cli\u003eESP8266 \/ ESP32\u003c\/li\u003e\n  \u003cli\u003eSTM32 and other 3.3V–5V microcontrollers\u003c\/li\u003e\n  \u003cli\u003ePLC and industrial control boards\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHome automation and smart switching\u003c\/li\u003e\n  \u003cli\u003eDIY robotics and prototyping\u003c\/li\u003e\n  \u003cli\u003eMotor and solenoid control\u003c\/li\u003e\n  \u003cli\u003eLighting control systems\u003c\/li\u003e\n  \u003cli\u003eIoT (Internet of Things) projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Is this relay module compatible with a 3.3V microcontroller like the ESP8266 or ESP32?\u003c\/h4\u003e\n\u003cp\u003eA: The relay module is designed to trigger at 5V or 12V. While many ESP8266\/ESP32 boards output 3.3V logic, you can use a logic-level shifter or connect the module's control signal to a 5V-tolerant pin. The VCC supply should still be 5V or 12V depending on your configuration.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does optocoupler isolation mean and why does it matter?\u003c\/h4\u003e\n\u003cp\u003eA: Optocoupler isolation means the relay's control circuit (your microcontroller side) and the output switching circuit (the load side) are electrically separated using light-based signal transmission. This protects your microcontroller from back-EMF, voltage spikes, or interference generated by the switched load — extending the life of your components and improving circuit safety.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this relay module switch AC devices?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, the relay output terminals (NO\/NC\/COM) are typically rated to switch AC loads within the relay's rated current and voltage limits. Always verify the relay's maximum rating on the component datasheet before connecting any mains AC device, and follow proper electrical safety precautions.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the difference between high-level and low-level triggering?\u003c\/h4\u003e\n\u003cp\u003eA: High-level triggering means the relay activates when the control signal goes HIGH (e.g., 5V). Low-level triggering means the relay activates when the control signal goes LOW (0V\/GND). This module supports both configurations, offering greater flexibility when working with different microcontroller output logic.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is this relay module compatible with a 3.3V microcontroller like the ESP8266 or ESP32?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The relay module is designed to trigger at 5V or 12V. While many ESP8266\/ESP32 boards output 3.3V logic, you can use a logic-level shifter or connect the module's control signal to a 5V-tolerant pin. The VCC supply should still be 5V or 12V depending on your configuration.\"}}, {\"@type\": \"Question\", \"name\": \"What does optocoupler isolation mean and why does it matter?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Optocoupler isolation means the relay's control circuit (your microcontroller side) and the output switching circuit (the load side) are electrically separated using light-based signal transmission. This protects your microcontroller from back-EMF, voltage spikes, or interference generated by the switched load — extending the life of your components and improving circuit safety.\"}}, {\"@type\": \"Question\", \"name\": \"Can this relay module switch AC devices?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, the relay output terminals (NO\/NC\/COM) are typically rated to switch AC loads within the relay's rated current and voltage limits. Always verify the relay's maximum rating on the component datasheet before connecting any mains AC device, and follow proper electrical safety precautions.\"}}, {\"@type\": \"Question\", \"name\": \"What is the difference between high-level and low-level triggering?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"High-level triggering means the relay activates when the control signal goes HIGH (e.g., 5V). Low-level triggering means the relay activates when the control signal goes LOW (0V\/GND). This module supports both configurations, offering greater flexibility when working with different microcontroller output logic.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/n8ande-60.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/n8ande-60.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"5V 12V Relay Module Optocoupler Isolation – 1 Channel Board\", \"item\": \"https:\/\/n8ande-60.myshopify.com\/products\/5v-12v-relay-module-optocoupler-isolation-1-channel-microcontroller\"}]}\u003c\/script\u003e","brand":"Axl","offers":[{"title":"12v","offer_id":44167206666327,"sku":"5:200004763#12v","price":5.96,"currency_code":"USD","in_stock":true},{"title":"5v","offer_id":44167206699095,"sku":"5:144170022#5v","price":5.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/6008\/7383\/files\/S01fa4658bdff42468b093bacb7f35dafs.webp?v=1786759457","url":"https:\/\/axlcustomersupport.com\/products\/5v-12v-relay-module-optocoupler-isolation-1-channel-microcontroller","provider":"Axl","version":"1.0","type":"link"}