5V 4-Channel Relay Module with Optocoupler Isolation
4-channel relay interface board capable of controlling up to 4 high-voltage appliances simultaneously with active-low optical isolation.
5V 4-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 4-Channel Relay Module is the cornerstone of multi-room home automation and industrial control panels. It packs four 10A relays with individual optocouplers on a single clean PCB.
Key Engineering Features:
- Independent 4-Channel Control: Switch four separate 220V AC or 12V DC loads independently.
- Dedicated Optocouplers: Each channel has an independent PC817 optocoupler and freewheeling diode.
- Separate JD-VCC Jumper: Enables complete physical power rail separation between microcontroller logic and relay coils.
- LED Indicators: 4 separate status LEDs indicate the state of each individual relay channel.
Common Engineering Applications:
- Multi-appliance smart home automation boards (Alexa / Blynk / Home Assistant)
- Agricultural smart greenhouse multi-zone irrigation solenoid valves
- Industrial sequencing panels and pneumatic valve banks
- Automated AC distribution power boxes
What's Included in the Package:
- 1x 5V 4-Channel Optocoupled Relay Board with Terminal Blocks and Status LEDs
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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