From: N295VV@aol.com
Message-ID: <75.272d2b3.260b5c2e@aol.com>
Date: Thu, 23 Mar 2000 06:38:22 EST
Subject: Re:Position Sensor
To: lancair.list@olsusa.com
Mime-Version: 1.0

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From: n295vv

A reliable position sensor which could be used for multiple applications can 
be made from a paired uv emitter and uv collector.  Mount them adjacent and 
parallel to each other in two small holes drilled in phenolic or dark 
plastic.  Adjust them so they shine on a reflective surface that will bounce 
the emitted uv back to the collector when the position is right.  Chromed 
metal or Aluminized tape will do the job.  A shiny bolt head will even work.

The same uv collector sensor can detect a match flame from about 15 feet with 
the proper circuitry and could be  used to make a fire detection system for 
your engine.

I retired at age 45 as a result of designing a level sensing temperature 
control system for the semiconductor industry which used these tiny sensors.  
They are very reliable and have a long life.

I want 5% if you make a lot of money from my suggestion.  Hehehe.

David Jones
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