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.
COMMENTS Homer SUGGESTIONS

PA / Tamper Module - Photograph

MORE ALARM CIRCUITS

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 Personal-Attack And Tamper Module . It will activate the siren 24-hours a day - even when the alarm is switched off. You can add as many of these PA / Tamper Modules as you like to the One Time Only Alarm.

A Photograph Of The PA/Tamper Module 
For Ron J's One-Time-Only Alarm


Click here if you're new to constructing stripboard projects.

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