>> An advantage of multiplexed operation, therefore, is an >> improvement in display intensity for a given average power >> consumption. > It's true up to a point, but not at higher brightnesses as the switching= =20 > and ohmic/Heating losses increase. ISTR, perhaps wrongly, that heating the die with high current pulses, as you might when multiplexing, contributes to a shorter LED lifetime * * ********** Quality PIC programmers http://www.embedinc.com/products/index.htm --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .