This circuit is a light measurement circuit. It is used for measuring the intensity of light. 5 LED's is a scale of light level. Trimmer Potentiometer is used for adjusted sensitivity of LDR for suitable that place.

Technical information:
- power supply : 9VDC. ( no 9VDC battery holder in the package )
- consumption : 25mA.
- light sensitivity : adjustable by trimmer potential-meter.
- PCB dimensions : 1.92 x 1.16 inches.

Download User Manual