PIR LED Security Light Circuit Schematic. Notes. The PIR sensor requires an initial stabilization time of about 10 to 60 seconds in order to function properly. During this time, the sensor gets ...

It’s simple. The PIR Sensor, when a motion is detected, it provides output to the OP-AMP of voltage (like 3.5V) to the (Non-Inverting) Pin3 which is higher than the voltage at, the (Inverting) Pin2 ...