This is a simple - easy to build - cmos 4060 based alarm system. When it's activated - it will sound the siren for a fixed length of time - and then switch off.
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A Cmos 4060 Based Alarm - Photograph

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Circuit Board

This is a photograph of the Cmos 4060 based One Time Only Alarm . It has automatic exit, entry and cut-off timers. When it's activated - it will sound the siren for a fixed period of time. Then it will switch off - and remain off.
It will not reactivate.

A Photograph Of Ron J's 
Cmos 4060 Based 
One-Time-Only Alarm 
Circuit Board


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Schematic
Diagram
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