Glen pointed out that we have inconsistent labelling of the samtek connector between the schemeatics: http://www.balloonboard.org/hardware/205/2.05connector.pdf and the website: http://www.balloonboard.org/hardware/205/con/samtek.html On the schematic the sections are B-F, and above they are A-E. The datasheet doesn't have much to say on the matter? Which is right? The website is a lot easier to change... Wookey -- Aleph One Ltd, Bottisham, CAMBRIDGE, CB5 9BA, UK Tel +44 (0) 1223 811679 work: http://www.aleph1.co.uk/ play: http://www.chaos.org.uk/~wookey/