A proximity sensor switch circuit that can be used as a detective circuit.
The circuit works based on the reflection of an infrared beam hitting the object and reflecting back to the receiver.
It is good for checking and detecting any approaching objects.

Technical specifications:
- Power supply : 12VDC.
- Consumption : 100mA. max.
- Detecting distance : 5-30 cm. (approx.)
- Time working delay : 0-10 sec.
- Loading : max. 5A./220VAC.
- PCB dimensions : 3.84 x 2.01 in.