Grim Reaper - Tracking Trick or Treaters

Archiver

Hi,

I'm pretty new to Stamps, but I'm learning fast (Al's book has been a huge
help - thanks Al!).

I'm working on plans for an animatronic Grim Reaper for my Halloween
display. I'd like to have it pan as people walk by the front
yard...tracking them as they go by. I figure the people will be about ten
or twelve feet away from the animatronic, the whole thing will be out in the
front yard on Halloween night.

What are my options for doing this?

I've thought about hacking some motion detectors (the kind for turning on
security lights)...but that just gives me a discrete indication that someone
is there...I want to be able to follow their movement as they walk down the
sidewalk. I'll pan the character's head with a servo, and have it talk to
them.

Any cheap heat sensing technology out there? [noparse];)[/noparse]

Thanks in advance for any ideas!

Bob Poniatowski
bobpony.home.mindspring.com/halloween