> All of the items that are created millions in a manufacturing > run are, if at all possible, done on a single sided PCB > because it saves significant money over the entire batch. That's somewhat debatable point, for example modern low-budget HDDs are created in tenth of millions and have a very small double (I believe) sided PCB. I think they could span the components to bigger one-sided PCB, but for some reason they don't. Regards -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist