Most alphanumeric displays use a controller that follows the Hitachi HD44780 specs. I've used all sorts of surplus LCDs with the same LCD driver code on PICs. I use 4-bit mode to conserve signals (needing 7 I/O pins overall). Crow /**/ On Wed, 27 Apr 2005, Bob Weigel wrote: > For years I've avoided designing with displays. But after getting into