Home Projects Miscellaneous 8 Channel Relay Board


8 Channel Relay Board
author: Rajkumar Sharma


This project is a general purpose 8 Channel Relay Board.


8 Channel Relay Board is a simple and convenient way to interface 8 relays for switching application in your project. Input voltage level support TTL as well as CMOS. Easy interface with Microcontrollers based projects and analog circuits.


Input supply 12 VDC @ 336 mA
Output eight SPDT relay
Relay specification 5 A @ 230 VAC
Trigger level 2 ~ 15 VDC
Header connector for connecting power and trigger voltage
LED on each channel indicates relay status
Screw terminal connector for easy relay output and aux power connection
Four mounting holes of 3.2 mm each
PCB dimensions 152 mm x 60 mm


download Schematic in PDF


 Parts List

 PCB Design


PCB top and bottom layers



120x90 spot



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