cheap motion detector

dharter

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I saw a motion detector chip in a catalog for $2.00
A schematic is available on the web site.
Here is the url if anyone wants to try it out http://www.elexp.com/opt_tect.htm
It is based on changes in ambient light level, which may not be suitable.
Perhaps this could be used as a second detector.   A picture would only be taken if it triggered and a PIR detecotr also triggered.
A PIR motion detector kit is also available for $16.50
 

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