Security Alarm System Circuit Diagram
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![Transistor based Security Alarm](https://i2.wp.com/www.engineersgarage.com/wp-content/uploads/2019/07/Circuit-Diagram-Transistor-based-Security-Alarm.gif)
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![Infrared (IR) Based Security Alarm Circuit using 555 Timer IC & LM358](https://i2.wp.com/circuitdigest.com/sites/default/files/circuitdiagram/IR-security-alarm-circuit.gif)
![Burglar Alarm Project with Circuit Diagram](https://i2.wp.com/circuitdigest.com/sites/default/files/circuitdiagram/Burglar-Alarm-Circuit.gif)
![diodes - Simple security Alarm incorrect schematic diagram - Electrical](https://i2.wp.com/i.stack.imgur.com/Jx90L.png)
![Forget door alarm circuit | ElecCircuit.com](https://i2.wp.com/www.eleccircuit.com/wp-content/uploads/2017/05/Forgot-door-alarm-circuit.jpg)