Laser Light Security System Circuit Diagram. Comparator is configured as non inverting mode and one 10k potentiometer is connected at its non inverting terminal. The circuit is using only few low cost components.
2 3 share spread knowledge. Focus the laser diode light on the ldr and you will see the l e d and buzzer going off if you interrupt the laser light focusing on the ldr the circuit will trigger and the alarm will ring. 100 nf capacitor ceramic disc type capacitor code 104 push button.
You can use any cheap toy laser available in the.
Two npn bc548 transistors implemented in this security alarm circuit as a switching device. The circuit can be used as a laser door alarm laser motion detector laser proximity sensor trip wire alarm and for other simple home security purposes. Easy laser light security system circuit at home. Here ldr placed to sense the laser light from the laser diode.
