EAN: 9783895765513

BUILDING A HIGH-TECH ALARM SYSTEM WITH RASPBERR...

This book discusses the basic components of any alarm system. All alarm systems have two basic
functions. First  they monitor their environment looking for a change such as a door or window
opening or someone moving about in the room. Second  they alert the legal owner or user to this
change. The system described in this book uses a scanning type software to detect intruders. It
behaves like a guard dog  pacing up and down the fence line on the lookout for either an
intruder or a familiar person. If you have an alarm key  you can disarm the system and enter.
With the scanning method  the software is easy to write and explain. It can scan eight alarm
zones plus two special fire zones in about one second. You don't have to be an electrical
engineer to install an alarm system  just a decent carpenter  painter  and plasterer! Because
this alarm system runs on 12 volts  you don't have to be a licensed electrician either to
install it. The alarm system presented here uses Python software on the Raspberry Pi combined
with some elementary electronic circuits. The code described in the book  as well as CAD files
and a bill of materials for the alarm panel  are available for free downloading. The book
provides the reader with examples of typical configurations coming straight from the author's
experience. After reviewing the hardware components typically used in common alarm systems  the
author shows how to plan one yourself. To implement a modular alarm  no matter if it is for a
single house or for a business or restaurant  the book shows how to skillfully combine a
Raspberry Pi with small auxiliary electronic circuits. These are not installation instructions
but food for thought that will enable readers to find a solution to their needs.

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