How to make Laser Security (Theft) Alarm using SCR 1 KM Range

Required Components:
1) C106MG SCR (siliconcontrolled rectifier)
2) 680 ohm Resistor
3) 100uF 25V Capacitor
4) Laser Module
5) LDR Sensor
6) 5V Buzzer
7) Push to OFF switch (Normally Close)

Circuit Diagram Link :
https://drive.google.com/file/d/111rZ...

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