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&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_W0QQitemZ300214248030QQcmdZViewItem

hope you are all doing well,

best,

Jaime