[AT] Spam> Tractor stuff and thieves, and your ideas

[John Wilkens]

We've been having increasing occurrences of burglary and vandalism 
around our country neighborhood :(.....so, I've decided to fabricate 
my own alarm system for the shop and my tractor stuff.  I want to 
power a loud 12 V. horn by an automotive 12 V. battery.  I can 
fabricate a heavy duty trigger switch or two, but I need your ideas 
on how I can hook up the 12 V. current to the horn with some kind of 
timer that would shut off the horn after 3 or 4 minutes.  All clever 
ideas greatly appreciated!        Wind is blowing and the snow is 
almost gone here in E. Oregon!         John W.

                    In the wide-open spaces of NE Oregon