Build this DIY Alarm system yourself. It will sound once only - you decide for how long. Then it will switch off. So it won't annoy the neighbours.
COMMENTS Homer SUGGESTIONS

One-Time-Only Alarm - Untimed Output Module

MORE ALARM CIRCUITS

One-Time-Only Alarm
Schematic
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Untimed Output - Circuit Description

Circuit For A Simple
Relay Alarm


Click Here For A Photograph Of The Prototype.

Veroboard
Layout
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