Скачать или смотреть Built a High-Tech LASER Security System for My Home

Built a High-Tech LASER Security System for My Home #shorts #viral #diy



Learn how to make a simple laser security alarm circuit using a 3.7V battery, BC547 transistor, LDR, resistor, and buzzer.
When someone blocks the laser beam, the buzzer instantly rings — perfect for students

Components Used:

3.7V Li-ion Battery (18650)

2 × BC547 Transistors

10kΩ Resistor

LDR (Light Dependent Resistor)

Buzzer

Laser Module



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