Simple Ir Sensor Circuit Diagram. The first ir circuit will just show how the pair ir led photodiode works. So this circuit can be built with two transistors like npn and pnp.
1x ir led 1x generic led 1x photodiode. Ir sensors infrared sensors are used in many electronic devices now. The photodiode detects the infrared light.
By using a transistor we can turn dirty analogue from the photodiode into clean analogue which the output led likes better.
A typical ir sensing circuit is shown below. Obstacle sensing circuit or ir sensor circuit. A typical ir sensing circuit is shown below. The figure below shows a project of a simple ir sensor circuit using lm324 ic.
