How to build a practical Burglar Alarm using a Cmos 4001. It will sound it's Siren once - for a preset time period - and then switch off. It has independently adjustable Exit, Entry and Siren Cut-Off timers.
COMMENTS Homer SUGGESTIONS

One-Time-Only Alarm

MORE ALARM CIRCUITS

One-Time-Only
Alarm
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How To Connect The Expansion Modules


The One-Time-Only Alarm has a range of Simple Expansion Modules that allow you to add any number of Alarm Zones, Personal Attack Zones and Tamper Zones to your system. There's also an Untimed Output Module. It will keep an internal sounder, strobe-light, lamp or whatever going after the siren has stopped.


How To Connect The
Expansion Modules To
The << One-Time-Only >>
Burglar Alarm System


Expansion Modules - Schematic Diagrams
One-Time Alarm
Construction Guide
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