timer

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555 Alarm/Timer Circuit

http://www.instructables.com

In this instructable i will explain how to build a simple 555 circuit that will blink a led and sound a buzzer, this has many application for example you can connect an LDR between the power source and the circuit and then put it in your closet where it is dark and when someone opens the closet the alarm will sound

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Created by Jayant 8 years 34 weeks ago – Made popular 8 years 34 weeks ago
Category: Electronic Circuits   Tags:

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