Arduino Infrared Sensor Wiring Diagram. To learn more about infrared and ir sensor circuit follow the link. Basically the pir motion sensor measures infrared light from objects in its field of view.
Vcc is the power supply for hc sr501 pir sensor which we connect the 5v pin on the arduino. Wiring connecting gp2y0a21yk0f ir sensor to arduino. The sensor output should be connected to any digital io line on your board.
The out pin from the ir sensor module is connected to the digital pin 2 on arduino.
For the actual experiment the ball will be dropped by hand down the tube. One of the reasons of hc sr501 pir sensor being extremely popular is. Thats it for connection now lets upload the. Everything which produce heat emits infrared like our human body.