Pir Circuit Diagram. So here is the schematic. Such detectors are widely used in industrial commercial and residential building automation applications see ti reference design tida 01398 for more system information.
Here pir when senses motion outputs 3 3v so we would be using this output pin to turn on and off the transistor which is on board. The left switch is the main on off. Now when we find the led blinking whenever there is any motion look back of the pir you will find a jumper which is placed between outer corner pin and middle pin see diagram above.
The following pir led lamp circuit was designed by me for one of the followers of this blog mr deepak upon his request.
So here is the schematic. Universal pcb and more parts. Go through the given diagram of the pir sensor to understand its pin outs and arrangement in the circuit. Incoming line connects to com on one switch.