You could try one of these, it's cheaper and already does what you want: http://www.hvwtech.com/products_view.asp?ProductID=270 You can also get just the PIR detector (it looks like a transistor with a window on top) and wire it up with a couple of op-amps to have an analog sensor.

Martin

Jaime Oliver wrote:

Hello all,

I was wondering if any of you had any experience hacking motion detectors, the kind that is used in stores to make a sound when you enter or in lights that turn on when you pass by... the key of course is that it should have a digital (on/off spirit). So far i have understood that they are called 'PIR motion switch'. I am looking to not do so much work (building and testing a sensor), but to get one i can hack & hook to a board and get 1's and 0's so any comment is great and I'll probably need 10-12 so the cheapest the better (they seem to be in a lot of lights so they should be cheap!!)

I am looking for something similar to this:

http://www.amazon.com/Ziotek-Sensor-Plug/dp/B000BSLTNI/ref=sr_1_19?ie=UTF8&a... http://www.amazon.com/Ziotek-Sensor-Plug/dp/B000BSLTNI/ref=sr_1_19?ie=UTF8&s=hi&qid=1207729271&sr=1-19

i suppose these should work too:

http://cgi.ebay.com/MOTION-DETECTOR-SENSOR-ALARM-CHIME-CUSTOMER-ALERT-NEW_W0...

http://www.thewholesalediscountstore.com/Shop/Control/Product/fp/SFV/32461/v...

hope you are all doing well,

best,

Jaime

-- Jaime E Oliver LR

joliverl@ucsd.edu mailto:joliverl@ucsd.edu www.realidadvisual.org/jaimeoliver http://www.realidadvisual.org/jaimeoliver www-crca.ucsd.edu/ http://www-crca.ucsd.edu/ www.realidadvisual.org http://www.realidadvisual.org

9168 Regents Rd. Apt. G La Jolla, CA 92037 USA

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