2 Channel Relay Board

  • Rajkumar Sharma
  • 25082
  • easy
  • Tested


This project is a 2 Channel Relay Board.


2 channel Relay driver project can be controlled by feeding 2-12V trigger voltage, Very useful project for application like Micro-Controller based projects, Remote controller, Lamp on Off, and any circuits which required isolated high current and high voltage switching by applying any TTL or CMOS level voltage. Two LED works as operation indicator while in , 3 pins screw terminals to connect load and provides  both normally open and normally closed switching.

  • Input: 12 VDC @ 84 mA
  • Output: Two SPDT relay
  • Relay specification: 5 A @ 230 VAC
  • Trigger level : 2 to 12 VDC
  • Header connector for connecting power and trigger voltage
  • LED on each channel indicates relay status
  • Power Battery Terminal (PBT) for easy relay output connection
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 49 mm x 68 mm





Parts List




  • Mr. A.Das.

    Can be easily convert as a remote switch by an infra-red T / R link , then it is very useful.

    5 years ago
  • stathis81

    Can arduino uno connected to laptop fire it up?

    5 years ago
  • Sidharth

    what is the purpose of c1 and can i use a ceramic 0.1uF capacitor, if not can you please give me exact specifications of C1

    5 years ago
    • Electronics Lab

      C1 is a filtering cap, used to reject noise from the power source, any 0.1uF cap will do the job.

      5 years ago
  • Misbah


    If i Want to use 5v Relay What Should I need to Change in the Circuit? In additional to it i also want to add HLK-PM01 – AC-DC-converter to supply 5v Relay More over I also want to connect this Relay to Arduino Uno or Node Mcu Via Wifi.

    Awaiting for reply

    3 years ago
    • admin

      It should work with 5V relays as it is. You can give it a try.

      3 years ago
  • momoko

    If i want to join with dc motor.
    What should i do?

    2 years ago
    • admin

      You can use this board to control any DC motor up to few A. It all depends on the relay rating.

      2 years ago
  • sarath

    please add pcb layout in pdf

    2 years ago
    • PCB and Schematic PDF are added above. Thanks

      2 years ago

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