laura capaldi wrote: > My question is whether I have to supply a 10V for Vref/GP1/AN1 Not if you want your PIC to live, or you're really certain that "absolute maximum" doesn't apply to you. Use a voltage divider to scale the 10V down to 5V into the PIC. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist