This is a simple - easy to build - modular alarm system. When it's activated - it will sound the siren for a fixed length of time - and then switch off. So it won't annoy the neighbours. Its modular design lets you to add any number of Alarm Zones, Tamper Zones and Personal Attack Zones to your system.
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One Time Only Alarm - Photograph

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One Time Only
Alarm - Schematic 		The Rest of Ron's Circuits Write To Ron More Free-to-Use Circuits Circuit Exchange International


Circuit Board

This is a photograph of the Cmos 4001 based One Time Only Alarm . It comes with a range of Expansion Modules that allow you to add any number of Alarm Zones, Tamper Zones and Personal Attack Zones to your system. When it's activated - it will sound the siren for a fixed length of time - and then switch off. It will not reactivate.

A Photograph Of Ron J's Cmos 4001 One-Time-Only Alarm - Circuit Board


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One Time Only
Alarm - Schematic 		The Rest of Ron's Circuits Write To Ron More Free-to-Use Circuits Circuit Exchange International


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