LED matrices like this do NOT have internal logic. Display lighting logic needs to be added externally, and that was what was being asked. Jeff BTW: How did I recieve this as a text attachment and not in the body? ----- Original Message ----- From: Amaury Jacquot for the displays, Alltronics has to have the best price around http://www.alltronics.com/displays.htm [97l012.jpg (5752 bytes)] 5x8 MULTI-COLOR LED DISPLAY Low power consumption, high contrast and brightness, single plane, wide viewing angle. 5x7 array with X/Y select (anode column/cathode row) Orange and green LEDs in each cell; yellow when both are on, white when both are off.. Compatible with USASCII and EBCDIC. Stackable vertically and horizontally. Overall size 1-1/2"W x 2-3/8"L x 5/16"D. Mfr. P/N LTP2458AA-NB. Data sheet included. 97L012 $7.99 each -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu