Generally, a laser-based Security System is a sort of security and alarm framework. It likewise utilizes laser light and a light sensor for security purposes. Meanwhile, a security system ensures our homes, workplaces, banks, storage spaces, and so on from interruption and unauthorized access.
Furthermore, a Laser security system can go about as an independent security framework. It makes some stability or commotion when distinguishing any sporadic action around it. Additionally, this system can be a part of a greater security and home automation system, which can send messages, call the proprietor, etc.
Therefore, today we will give an instructional tutorial on making a simple laser security alarm with few electronics components at home. However, the circuit can likewise utilize as a laser entryway alert, laser motion detector, laser vicinity sensor, tripwire alarm, and other primary home security purposes.
Hardware Components
| S.no | Component | Value | Qty |
|---|---|---|---|
| 1. | Transistor | 2N4403, 2N3906 | 1 |
| 2. | Piezo Buzzer | – | 1 |
| 3. | LDR | – | 1 |
| 4. | Laser Beam (as an input source) | – | 1 |
| 5. | Potentiometer | 50k | 1 |
| 6. | Capacitor | 1000 uF | 1 |
| 7. | Battery | 9 to 12 volts | 1 |
Circuit Diagram
Circuit Operation
The circuit is utilizing just a few electronics components, and all are the parts that are likewise easily accessible in the market at cheap rates. Meanwhile, you can use any modest “toy laser” by eliminating the inner cells from the laser and associate it with a power supply for consistently running for laser light.
Additionally, an LDR likewise utilizes to detect the laser beam. Moreover, the transistor is operating here as a switch. At the point when an individual or item will come in the middle of the laser beam, the transistor will become switch on for a short time and charge the 1000uF capacitor and actuate the signal. The buzzer will likewise, in this case, run for a few seconds from the 1000uF capacitor after the transistor will cutoff.
Additionally, for the buzzer, you can utilize any 9V to 12V piezo buzzer. The sensitivity of the circuit balances with the 50K variable resistor. In addition, the circuit ensures that the LDR does not get any light aside from the laser beam. Meanwhile, it should be possible by fitting the circuit in a packed box and making a little opening in the container from which the LDR will get the laser beam.
Applications and Uses
The following are the typical applications of Laser security alarm:
- Door security alarm
- Motion detector
- Home or office security
- Tripwire alarm
