Light interruption detector

Posted on Nov 25, 2012

When the light incident on the LASCR is interrupted, the voltage at the anode to the 2N4990 unilateral switch goes positive on the next positive cycle of the power which in turn triggers the switch and the C230 SCR when the switching voltage of the unilateral switch is reached

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

This will cause the load to be energized for as long as light is not incident on the LASCR.

Leave Comment

characters left:

New Circuits



Popular Circuits

Shift register driver
Nicad Battery Tester
Electrolytic Capacitor Reforming Circuit
Bicolour LED flasher circuit
digital alarm clock
Si3210 Si3211 Si3212 Hardware Reference Guide
Audio Oscillators
School Video conference Infrastructure
Inexpensive frequency counter tachometer
Brushless motor rotor a stator and a drive circuit
IC audio power amplifier circuit