Laser Security Alarm Circuit Diagram. Here ldr placed to sense the laser light from the laser diode. Objective to make and study the functions of a laser security system.
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. Laser door alarm is based on the interruption of laser beam.
Laser security alarm circuit produce highly audible buzzer beep sound when the laser light blocked.
Previously we have also built some security alarm circuits like this pir sensor based motion detector and burglar alarm circuit. Laser door alarm is based on the interruption of laser beam. Here ldr placed to sense the laser light from the laser diode. This is a project of smiple laser security alarm circuit.
