ULN2004 + Arduino Mini Pro

arduino and relay side
copper_side_pcb see at the top the uln2004
 Today i make a simple 24 volt relay controller with arduino and uln2004



2 comments:

  1. cnc router Wonderful illustrated information. I thank you about that. No doubt it will be very useful for my future projects. Would like to see some other posts on the same subject!

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