Oli Glaser wrote: > of course you could set the ADC reference to 1V full scale too No, you can't. Not on most PICs anyway. Not if you want the A/D to work correctly and at full resolution. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .