Tuesday, December 20, 2016

How to make Laser security alarm

easy home made laser security system or burglar alarm

Also it is a good science project idea



Parts need -

Bread board or vero board

Laser pointer

L.E.D

L.D.R

Cl 100 or bc 548b transistor

Resistor 1 k, 10K

Buzzer

Battery AAA x3 or used mobile phone battery



























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