RussellMc wrote: > with a meter of suspect calibration Which reminds me if you see a low battery indication on your multimeter=20 replace the battery. In my experiance if you ignore the low battery indication on a=20 multimeter and keep using it the multimeter starts to seriously=20 over-read (I guess the voltage on the internal reference source drops). --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .