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Simple House Alarm circuit

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This circuit is also Crossed to: Alarm

This house alarm circuit has open and closed loop sensor and has self shutdown function. The delay after trigering can be adjusted from 1 minute to 12. The delay before trigering is 13 seconds. Offcourse all this timmings can be change with litle changes to few passive parts.
Simple House Alarm circuit

The inportand parts in the circuit are 3 ICs CD4011 which are well known quad2 input nand gates, a timer 555 and the CA3097E.


Datasheet file1: Click here to download CD4001.pdf datasheet.

Datasheet file2: Click here to download LM555.pdf datasheet.

Datasheet file3: Click here to download CA3097E.pdf datasheet.


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