Home Projects MCU 8 Opto-isolated Relay board

 
 

8 Opto-isolated Relay board
author: Dr. Ayman Shalaby - aimanshalpygmail.com



 

This is a 8 channel relay interface board using ULN2803. All the relays are opto-isolated using optocouplers and can be controlled directly using a microcontroller of any kind (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic) or a PC.

 It's easy to manufacture and have three pin screw terminals for easy connectivity.


 Schematic


The full schematic is shown below

 

click on schematic for full resolution

 

 PCB Design


 

 

 



Downloads


Download Eagle design files

Download Gerber files



 
 

 
120x90 spot

 

 

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