<HTML><FONT FACE=arial,helvetica><HTML><FONT SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Maybe this is too obvious, but I have used a TIL311. This very old device is still available but do shop for the best price. There is a new manufacturer for these parts. I think it is "Taos" or something to that effect. These new ones are really pricey, though, but can be had from Mouser. Jameco has them cheaper. I swear that somebody was selling these for about $6 but I'll be darned if I can remember who it was.<BR>
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A TIL311 is a hex display with decoder and constant-current drivers. Give it +5V, ground, and a 4-bit binary code ... done! No resistors, no logic, no 90 minutes worth of wiring to get wrong. Is a chip with a clear, red tinted body and itsy-bitsy LEDs inside which form the digits. Very cute but a bit power hungry. A pair of these are really handy for getting an instant read on an 8-bit port value, for example. Since the logic and display itself is all in the same package, simpler is not possible. Cheaper, yes. Simpler? No.<BR>
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Peace.<BR>
Tom Farrand<BR>
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