Circuit diagram of brightness control relay

Posted on Nov 10, 2015

Shown for the brightness control relay circuit. Resistors R1, R2 and R3 form a light-sensitive resistor voltage divider circuit,

Circuit diagram of brightness control relay
Click here to download the full size of the above Circuit.

when the light is dark to a certain extent, VT1 base voltage rises to make VT1, VT2 conduction, the relay pull-J. R1 is used to adjust the motion sensitivity. The light trigger level circuit greatly influenced by the supply voltage and ambient temperature.

Leave Comment

characters left:

New Circuits



Popular Circuits

SWR Meter
5V supply
LM723CA31402N3055 Variable Regulator 0-30V 5A
Audio Oscillator
A long light power control circuit