I have drawn up an 8 channel relay board from a couple of different schematics and wanted another set of eyes to proofread it for me. It is an opto-isolated system that will be controlling 24V max.
I have never used a relay with an Arduino and I would rather design my own ckt than to just buy one. As I am aware, this should be an active-low layout. Are my assumptions correct?
The IN1-IN8 are the Arduino inputs and +5V will come from a Power supply. VCC will come from Arduino’s supply.
Any advice or constructive criticism is welcome.
Relay Board.sch (988 KB)