Sensors for h/w project

I need some specific information concerning sensors-Doing net searches for info on sensors doesn't yield much other than lots of h/w company ads but we need some more specific help. we're trying to build a "smart" cam which can turn/aim at someone as the person moves around the room. we're toying with motion,sound or/and infrared sensors. our budget for everything inc the camera is less than $1k. id appreciate it if someone who has experience with implementing sensors could shed some light on the matter -
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HippyConnect With a Mentor Commented:
A better/cheaper way of doing what you want to, is to have the servo/movement system run by the computer, you would have to write or obtain software that takes a sample of the video from the camera, breaks it up into a grid looks for a fair change from the last sample and tracks the servos th centre the movment, hence aligning center frame with the motion.
This would possibly be cheaper than specialised tracking hardware, particularly if there is already a computer in your plans. The algorythm would be similat to satalite tracking. So a sat-track type program may be a starting point.

Hope this is of some use.

outsiderAuthor Commented:
Thanks for the input, hippy. I'm definitely going to look into it but for now i'm not sure if that will be accd. to the requirements of our proj (ie implementing sensors might be mandatory)

specific types of sensors, models, etc any info will be helpful - and i'll be glad to give  more points to someone .
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