How To Make A Laser Light Security Alarm System

How To Make A Laser Light Security Alarm System

In This Video I Am Going To Show You How To Make A Laser Light Security Alarm System. What You Need To Build This Project ▪BC547 Transistor ▪2.2KΩ Resistor ▪Red LED ▪LDR (Light Dependent Resistor) ▪4V Battery ▪Buzzer ▪SPST Switch ▪Red Laser Light etc. Subscribe To Apna Creative Idea By Clicking The Link https://goo.gl/jSp7vt Thanks For Watching And Yes Don't Forget To Like, Share & Subscribe For More Awesome Videos..
YouTube https://youtu.be/EGnXSzPV_M8

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