Interface Relay With Arduino

Relay is a electrically operated switch. Relay is used to isolate electrical load. Two configuration NO(normally open)] NC(normally close). Relay have coil which is energized by 12v, when coil energized switching action takes place. BC548 BC548 is general purpose NPN bipolar junction transistor . This transistor act as a driver to pull the relay ON. … Continue reading Interface Relay With Arduino