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 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

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

PA / Tamper Module - Photograph

Circuit Board