🚀 go-pugleaf

<FWR100@psuvm.psu.edu> writes:

>Enough picking on other people's suggestions :-)  Here's my idea -
>Have a multi-position tilt sensor.  Basically, a pendelum that will touch one
>of several contacts depending on tilt.  Once the system is armed, the alarm
>will sound if the pendelum changes position.  Should be easy to build from
>some TTL gates - basically just a comparator and a shift register.

   These devices have been produced commercially.  I believe Alpine had such
a device, at least a few years back.  It was a 2-axis inclinometer with a 
solenoidal clutch.  The strategy is to wait for a minute or so after the
alarm is armed, and then memorize (ADC?) the inclinometer outputs.  Any
significant deviation would trigger the alarm.  Perhaps you can acquire one
of these from Alpine as a replacement part.
   A pair of low-g accelerometers would obviously serve the same purpose,
without the reliability problems of a mechanical assembly.
-- 
Ray Berry kb7ht ray@ole.cdac.com 73407.3152@compuserve.com /*inquire within*/