Laser Light Security Alarm Circuit Diagram. Security is main concern for various buildings houses and offices. Talking about circuit diagram it is noticed that a tl072 op amp ic1 a is set up as a voltage comparator used in between the adjustable voltage driver p1 r4 and the light dependent voltage which comprises of photodiode d1 and r3 a fixed resistor.
Previously we have also built some security alarm circuits like this pir sensor based motion detector and burglar alarm circuit. Here ldr placed to sense the laser light from the laser diode. The circuit is divided in to two sections first is a laser transmitter or laser light and second is a laser receiver with time delay and alarm or siren circuit.
The laser pointer is used as the source of light beam.
Normally laser door alarm circuit will have two sections. Normally laser door alarm circuit will have two sections. The circuit is divided in to two sections first is a laser transmitter or laser light and second is a laser receiver with time delay and alarm or siren circuit. An ldr photo resistor is used to sense the laser beam.
