How narrow is the track? You could potentially use laser or IR if you can position the vehicles such that only one goes through at a time (laser or IR) and/or the track is narrow enough to get the sensor (IR) close to the vehicle) On 10/11/06, Debbie wrote: > > PICers, > I have a possible(?) project coming up that involves vehicle > detection/counting. Pessure mats, wire loops etc not an option. The gizmo > needs > to be small, & portable - the requirement is to count cars as they > enter/leave > a large outdoors *BIG* temporary car park. The cars will come down a > narrow > track marked out with poles/flags, so the sensor can be positioned pretty > close > as they pass buy. digging up the grass for cables etc - No No. > > I was thinking maybe of Honeywell's detectors. To wit, one of these ---> > > http://www.ssec.honeywell.com/magnetic/mark_det.html > > Has anyone used them? Are they OK? Are there better/cheaper devices > around? > > Thanks for advice - Debbie > > > > > ____________________________________________________ > Do you Yahoo!? > Join the Girlfriend magazine VIP Club for insider info, freebies and more > http://www.girlfriend.com.au/ > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- Shawn Wilton (b9 Systems) http://b9Systems.com <- New web page -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist