----- Original Message ----- From: rad0 > I think it was due to the number of dots per row that happened to > be on at any one time...so the transistors will probably do it, > > I was running it directly from the latch... It is likely due to the number of dots lit in a particular row, I have seen it. You will almost definitely want a drive transistor on the row select if you want to fix it. Jeff -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads