How to make a simple Laser Security System

This a simple laser security system anyone can make at home.
This system can be installed in houses to protect from thieves.
Things:-
1. laser
2. 9v battery
3. buzzer
4. 2.2k ohm resistor
5. BC547 transistor
6. LDR
7. 9v battery connector
CIRCUIT DIAGRAM:-
drive.google.c...
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