On Jan 15, 2008 5:44 AM, Michael Rigby-Jones wrote: > Adding numerous zero ohm links is certainly useful during > prototype/development stage where the extra section might turn out be > useful (and can be kludged into operation with some wires soldered on), > but adds unnecessary cost and board space to a finalised design. > I will say the one says "SMART" will be labled "Brain Dead" in many practical designs due to cost and board space constraint. And you will only put optional resistors to more critical places, not an unused OPAMP pins. The one marks "Good" is correct assuming single supply. Assuming dual supply, the one marked "NO" and the one makred "Just as bad" are both correct. Xiaofan -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist