re long distance ir detection in article apr macc wisc edu jvannes vms macc wisc edu writes you are probably referring to the products of opto diode corp mitchell road newbury park ca the make some amazing irled s the really high powered devices are arrays of or led s on a to header the chip model puts out watts in response to a amp us pulse at a duty cycle i think these are designed as illuminators for ir vision systems jeez that should do it i would also be interested in the application here i work with a dance and technology program and want to build something to track dancers on a foot wide stage from feet away very interesting application controlled lighting and environment moderate distances might be more interesting than my application just a thought you could use a roof mounted ir sender similar in operation to a tv remote control that tells each persons coded ir pulser to send a pulse a hamamatsu detector as was mentioned in a previous message in this thread would give the current position store and collate this on a computer and you could replay the movements on the screen interesting stan burton dnd crad dres dtd mss agcg sburton dres dnd ca dre suffield box medicine hat ab canada t a k
