On Sun, 26 Aug 2012 16:07:01 +0100 peter green wrote: > I want to take a group of 3.3V logic signals, buffer them and output=20 > them as either 3.3V or 5V logic signals at the board users selection. If they are not too fast, you can probably find an open collector/drain buffer which will accept 'over-voltage', or even a transistor array from the ULNxxx series.=20 John --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .