I'm trying to build a home automation project using Arduino UNO and SDR 12V 4-Channel relay
Here is the configuration I did:Relay DC+ to 5V Arduino
@raschemmel.Did you see the attached image (post#1). It's not the usual relay card.I traced the "LOW" selector pins to the +12rail.If you connect the jumper to "LOW", you might never be able to turn the realys off with Arduino's 5volt logic.
Why can't there be only one system that every noob understands.