On 21/02/2012 11:46 AM, IVP wrote:
>> I might revisit the PIR modules
> You could try one (security sensors, especially exterior, are often
> at giveaway prices, w/o bulbs) and window the lens with paint or
> paper to limit its view

Panasonic have some small PIR modules starting around the $15 mark that=20
might do if can reduce the range.

I tried an ultrasonic ranging module (SRF02) today and it works quite=20
well.   That may be a solution if ceiling mounting them becomes an=20
option as they should be away from abuse and dust up there.
David...

--=20
___________________________________________
David Duffy        Audio Visual Devices P/L
Unit 8, 10 Hook St, Capalaba 4157 Australia
Ph: +61 7 38235717      Fax: +61 7 38234717
Our Web Site: www.audiovisualdevices.com.au
___________________________________________

--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.