Infrared Proximity Sensor Wiring Diagram. You can see the connections in the ir sensor circuit diagram. For supply voltage of 9v or more use 1k resistor for led and 470r for infraredir led.
Connecting a two wire inductive proximity sensor to arduino uno general electronics forum. The datasheet suggests a capacitor of 10 µf or more i used 220 µf. Photo diode is connected in reverse bias inverting end of lm358 pin 2 is connected to the variable resistor to adjust the sensitivity of the sensor.
It is a low cost sensor which can detect the presence of human beings or animals.
The wiring diagram below shows you how to connect the gp2y0a21yk0f ir distance sensor to an arduino. You can adapt this circ. The circuit is simple and easy to make it has 2 transistors 4 resistors an ir led an ir phototransistor and a purple or white or green led use as an indicator so you can remove it if you want electronic components list. And non inverting end pin 3 is connected to the junction of photodiode and a resistor.