MyNick:
someone?
Get relay boards that use optical isolators to connect to the arduino. The arduino only powers the optical isolator, the rest of the relay board would use the external power supply to operate the relays.
MyNick:
someone?
Get relay boards that use optical isolators to connect to the arduino. The arduino only powers the optical isolator, the rest of the relay board would use the external power supply to operate the relays.