As a result of this project, we will create a unique Laser Security Alarm Circuit. For different processes, apartment buildings, and workplaces, security is the primary concern. For this motive, many safety alarms currently exist that works with various types of detection technology such as infrared sensors, security cameras, laser scanners, gyroscopes, etc. We can create a laser safety warning on this circuit using laser light and a laser light detector circuit. If anyone crosses it, it is ignited.
Hardware Component
The required hardware components to make a Laser Security Alarm Circuit are
| S.no | Component | Value | Qty |
|---|---|---|---|
| 1. | LED | – | 1 |
| 2. | Battery | 9v | 1 |
| 3. | LDR | – | 1 |
| 4 | Laser light | – | 1 |
| 5. | IC | NE555 timer | 1 |
| 6. | Resistor | 10K, 150 Ohm, 10K Var | 1, 1, 1 |
| 7. | IC | LM358 | 1 |
| 8. | Breadboard | – | 1 |
| 9. | Capacitor | 220uF | 1 |
Circuit Diagram
Circuit Operation
We used the LM358 Dual Comparator IC to estimate flow rates from the LDR on this laser shield alarm circuit. Moreover, the comparator is organized to non-invert mode, and at its non-inversion terminal, one 10K potentiometer is wired up. The light or laser light is detected in a 10K resistor concerning the ground by an LDR. And the LDR and resistor core are attached directly to the inverting comparator terminal. For detection indication, a red LED is connected to the output pin of the comparator.
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By activating the buzzer and LED for a duration, a monostable multi-vibrator is also used. For powering the circuit is a 9-volt battery.
Applications and Uses
Insecurity desks in our houses and flats, the Laser Security System can be used where even when your desk code is tried to hack, it acts as a further security layer. This laser setup can be used to check whether animals or babies have crossed a specific border as well as security systems.
