From the Publisher
As well as describing the bewildering range of security devices on offer, more technical readers may consider their own solutions using descriptions and circuits for two simple tested designs are given, one for the home and one for a foolproof public hall system. There is a plethora of security devices now on offer. Large sums can be spent on elaborate systems, yet weak links can be left unrecognized - except by the housebreaker! Good independent advice is scarce, as most security firms favor their own products. This book explains the pros and cons of alarm systems, including how to avoid faults, and find them if they occur. `Friendly security' is particularly featured, and other security devices are given a critical scrutiny.
About the Author
Technical author, audio consultant