I need a custom sketch written. I have 20 relays that I need to randomly turn on and off.
the catch is no more or less than 4 should be on at a time. Need ability to flip a switch and turn them all on. time needs to be able to be adjusted.
Hello. I have more then 3 years expirience with Arduino. I can do it right now. Do you have connection of your relays and logik level to activate is LOW or HIGH?