Pir Motion Sensor Module Circuit Diagram. Use 9v dc to operate this circuit but make sure that sensor is required only 5v dc so use a 5v voltage regulator lm7805. Connected to the output pin is an led.
Infrared pir human motion sensor detector modules. The third idea below explains a simple pir motion detector alarm circuit which can be used for activating lights or an alarm signal only in the presence of a human or an intruder. The circuit diagram for arduino motion detector project by interfacing arduino with pir module and blinking an led buzzer is shown in the below image.
Pir sensor is high sensitive with any motion movement of anything around this range.
Then connect the digital out pin of the pir sensor to the digital i o pin 8 of arduino. The pir sensor module has three pins. We place a 470ω resistor in series to limit current so that the led doesn t receive excess current. The design of the pir motion sensor using arduino is very simple.
