Ir Proximity Sensor Circuit Diagram. When this beam is disturbed it widens and hits the photodiode. Because the output of the photodiode is not constant i opted for a circuit with bc547 transistors.
When an object or your hand keep in front of about 0 5 cm then the output will high. So in this project we are going to design a simple infrared proximity sensor circuit using npn transistors. The photodiode detects the infrared light.
It consists of an ir led a photodiode a potentiometer an ic operational amplifier and an led.
An ir proximity sensor is a device which detects the presence of an object or a human when it is within a predetermined range from the sensor through reflected infrared beams. When this beam is disturbed it widens and hits the photodiode. Infrared proximity sensor circuit obstacle detector circuit infrared proximity sensor circuit or obstacle detector circuit there are 3 infrared proximity sensor circuit that can be used as an obstacle detector circuit. The ir circuit described below is mainly designed for liquid level detection or proximity detection.
