The PIR motion sensor light wiring diagram is shown below. The basic idea is to amplify the output signal from the PIR sensor to control the relay, which, in turn, switches the bulb on or off. The ...

The motion sensor is simply a PIR sensor connected to a 434MHz RF transmitter via an encoder. The encoder uses four bits, in the form of resistors tied to HIGH (+VCC) or LOW (GND). That's enough for ...