> "from 3 to 10 > 15 and 16 > from 18 to 30 > > numbered pins empty" > > So all these pins are available for resistors ? Or do you really want > to have an analogue voltage generated by one pin ? I mean, could > be extravagant and use a frequency to voltage convertor. What sort > of settling time for this voltage are you looking at ? yes those are empty but voltmeter (which is going to measure the output) probes will be consant.This is why I said that the output must be at one pin. And Robert, can you extend your NON-PIC solution a little bit further, it sounds matching my need. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist