>The customer only wants two digits, and I guess I can put at least 5 in >series, so that would be 7 x 2 x 120 x 0.02 / 5 = 6.72 A. No problem for a >car race environment where accu's are found all over the place. But how >large were your digits? > >Wouter Have you looked at the luminescent digits? They are about a foot tall, not sure if they would be visible enough in daylight. If it's only during the day I built a timing system for marathons a few years back. This display was 18" using electromechanical segments. The company had smaller and larger versions. We used ultrasonic wristbands and the runners had to pass within a few feet of a sensor pad. The problem was by about the second stage the "runners" tended to get a bit focused and zoned out on things so you almost had to grab em and direct them towards things. Otherwise it was a bit like herding a bunch of cats. Dave -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu