>>> However, as the parts count goes up, I'm real tempted to just buy a level >>> translator chip. Especially if there are several lines to be translated. >> >> They may not work well for a long bus as they only >> translate voltage, they don't "drain "current. > > I smell a dead fish being waved. Bon appetit. Level translators are not the same as bus drivers in context of the discussed long bus. I said to "drain" current to ground on a sender side. Another option is to source current from power supply on the sender side. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist