12v Relay Module Circuit Diagram. The most simple form of relay. Two circuits terminals 87 and 87a have a common terminal 30.
Looking at the diagram we see the pinout of a typical 12v relay. 85 and 86 are the coil pins while 30 87 and 87a are the contact pins. Numbers of a relay.
Since the relay has 12v trigger voltage we have used a 12v dc supply to one end of the coil and the other end to ground through a switch.
Circuit schematic description. Since the relay has 12v trigger voltage we have used a 12v dc supply to one end of the coil and the other end to ground through a switch. Looking at the diagram we see the pinout of a typical 12v relay. Below given is relay driver circuit to build your own relay module.
