All the information you need to build a vehicle anti-hijack alarm - using cheap off-the-shelf components.
COMMENTS Homer SUGGESTIONS

Hijack Alarm No.1

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ALARM CIRCUITS

Circuit Construction Details The Rest of Ron's Circuits Write To Ron More Free-to-Use Circuits Circuit Exchange International

Detailed Circuit Description

This material is being extensively re-written.

For the present - please Download the previous version of the page.





Schematic Diagram

Circuit Diagram Of A 
Vehicle Hijack Alarm

Circuit Diagram Of A 
Vehicle Hijack Alarm
Before fitting this or any other engine cut-out to your vehicle - carefully consider both the safety implications of its possible failure - and the legal consequences of installing a device that could cause an accident. If you decide to proceed - you will need to use the highest standards of materials and workmanship.


Notes



The Flow Chart is another of Eric's suggestions. It will help you to visualize how the alarm is operated. It also explains the sequence of events that lead to siren activation - and subsequent engine failure.


Veroboard Layout

Veroboard Layout For 
The Hijack Alarm





Hijack Alarm No.1 - Construction Details

Alarm No.1
Circuit Description
The Rest of Ron's Circuits Write To Ron More Free-to-Use Circuits Circuit Exchange International