I am planning on sending a board to Olimex to be fabricated. I am still laying out the board, my question is this page http://www.olimex.com/pcb/index.html indicates FR-4, thickness 1.5mm (0,062"), copper 35um (1oz), Can I assume this is 1 oz/ft^2 as required by the Track width calculator page ? Track width calculator located here. http://www.desmith.com/NMdS/Electronics/TraceWidth.html TIA, Kevin Max Current for the application is 1.4A @ 8.4V. So that tells me I should use a track width of 65mils with 25 mils of clearance, correct ? -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist