Laser Light Security Alarm Circuit Diagram. Two npn bc548 transistors implemented in this security alarm circuit as a switching device. 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.
The laser pointer is used as the source of light beam. Laser door alarm is based on the interruption of laser beam. If somebody tries to break the laser path then an alarm will be generated in a few seconds.
There are a variety of security alarms available in market which uses various types of technology for intruder detection like infrared sensors motion sensors ultrasonic sensors laser sensors etc.
Design your own li fi dongle and speaker schematic circuit diagram november 18 2020. Simple laser security alarm circuit diagram this is a project of smiple laser security alarm circuit. Laser light security alarm schematic circuit diagram november 19 2020. Normally laser door alarm circuit will have two sections.
