“Arduino Self-Timer” project presented here is a low-component count 60 seconds countdown timer. It can be powered from a 9V compact battery or suitable Arduino AC mains adaptor. Working of the ...

Arduino powered car heater timer. 2 and 3 pins is relay, i used two relays for 230v that I can make sure that my car starts to warm up even if the second relay breaks down, the intention was to test ...