At 16.19 2012.05.19, you wrote: >A typical car battery is rated to supply 875A with output voltage >equal or better than 7.2V, or 700A at 0=B0C. So, the internal resistance >of the fully charged battery won't exceed 5.5milliohms. Similarly, typical >voltage drops under normal cranking should not exceed around a volt >total. If we assume typical cranking current is 300A, then we have >3.3 milliohms for the wiring. A 100nF bypass ceramic cap will do the trick. ;) --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .