Interface Relay with 8051

Relay is a electrically operated switch. Relay is used to isolate electrical load. Relay can operate in two state NO(normally open) NC(normally close). Relay have coil which is energize by 12v ,when coil energized switching action takes place. BC548 Transistor BC548 is general purpose NPN bipolar junction transistor . This transistor act as a driver … Continue reading Interface Relay with 8051