Light Detector Circuit


Posted on Feb 17, 2013

Variable resistor R1 adjusts the light threshold at which the circuit triggers. R1`s value is chosen to match the photocells resistance at darkness. The circuit uses a CMOS 4001 IC. Gate U1a acts as the trigger, U1b and c form a latch. S1 resets the circuit. The output device may be a low power piezo buzzer.


Light Detector Circuit
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

8 Channel PWM with AT90S1200
Low loss brightness control
NiMH Battery Chargers
subwoofer filter circuit
TS555 Timer
I2C Anemometer cheap wind data logger
Hv440: High Voltage Ring Generator



Top