5V 1-Channel Relay Module with Optocoupler Isolation
Standard 5V single-channel relay board with optocoupler isolation for safely switching AC 220V home appliances using Arduino, ESP32, or Raspberry Pi.
5V 1-Channel Relay Module with Optocoupler Isolation is an original, pre-tested electronic module designed for Arduino, ESP32, Raspberry Pi, robotics, and embedded engineering projects. Includes verified pinout compatibility and nationwide express shipping across Pakistan.
The 5V 1-Channel Optocoupled Relay Module allows low-voltage microcontrollers to safely switch high-voltage, high-current AC mains devices like bulbs, fans, water pumps, and solenoids.
Key Engineering Features:
- Optical Isolation (PC817 Optocoupler): Complete electrical barrier between your sensitive microcontroller GPIOs and high-voltage AC mains noise.
- High-Current Relay Contacts: Rated to switch up to 250V AC at 10A or 30V DC at 10A.
- Form C Contacts: Features NO (Normally Open), NC (Normally Closed), and COM (Common) screw terminals.
- Diagnostic LEDs: Green Power LED and Red Relay Status LED show switching state at a glance.
Common Engineering Applications:
- Smart home automation and room light switching via WiFi (ESP32/ESP8266)
- Automatic water pump controllers with float switch triggers
- Temperature-controlled cooling fan or heating element relays
- Security siren and gate solenoid actuators
What's Included in the Package:
- 1x 5V 1-Channel Optocoupled Relay Module Board
Pinout Interfacing & Testing Guide:
Check the silkscreen pin labels (VCC, GND, SDA/SCL or I/O) and confirm whether your microcontroller uses 3.3V or 5V logic.
Wire the power, ground, and signal pins to your Arduino, ESP32, or Raspberry Pi using breadboard jumper wires.
Upload a standard test sketch via Arduino IDE or MicroPython and verify live readings on the Serial Monitor.
Need a Custom 3D Printed Casing or Multilayer PCB?
Get custom snap-fit enclosures and robotics parts printed via our custom 3D printing service in Lahore & Pakistan, or order industrial double-sided circuit boards through our custom PCB fabrication service with nationwide delivery.
Key Features
Specifications
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