How to make a Laser Light Security Alarm Circuit Diagram Because, in this tutorial, we are going to make a "Laser Security Alarm Circuit". Along with the laser, the circuit uses the LDR as its key component. The electrical characteristic of the LDR is where the light increases, and its resistance decreases. Because of the higher resistance, the circuit does not operate until the light falls on
If your alarm circuit is powered by 4.5 volts (three AA batteries), then it is possible to power the laser pointer from this battery pack as well. All you have to do is connect the terminals of the laser pointer to the batteries of the alarm circuit. One terminal of the laser pointer is a spring that sticks out of the internal circuit board.
How to make a Laser Security Alarm Circuit Diagram
A laser-based security system is a type of security alarm that uses a light sensor and laser light. In this tutorial, we are going to demonstrate a circuit of a laser security alarm system that will detect any irregular activity and will produce sound using a buzzer. One of the main components of this circuit is LDR.
We know the LASER (Light Amplification by Stimulated Emission of Radiation) light has high strength focused light rays, in this project we have used that laser light as a fence. Laser security alarm circuit produce highly audible buzzer beep sound when the laser light blocked. Here LDR placed to sense the laser light from the laser diode.
Laser Security Alarm Circuit Circuit Diagram
As soon as you connect the battery the L.E.D and buzzer will come "ON" (if you're in a dark room). 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! Congrats! Your "Laser Security Alarm System" is now ready!