W. Lee Vick, Jr. wrote: > I'd like to build a box which determines the order of finish of > a pine box derby (small wooden cars about 7" by 3" which run down a > slotted track) race. Ideally there will be one micro controlling > things, 6 sensors (one for each lane in the race), and 6 7-segment > LED's which will show the position in which the cars finished, and a > button for resetting the system for the next race. Lee: It's been done. If you're only interested in HAVING one of these things, rather than in BUILDING it, call John Shreffler at New Directions, Inc. He sells something called "The Judge"... LCD timer; 2- to 8-lane capability; 1st, 2nd, and 3rd-place indicators, etc. New Directions can be reached at 703 319 0840. -Andy Andrew Warren - fastfwd@ix.netcom.com Fast Forward Engineering, Vista, California http://www.geocities.com/SiliconValley/2499