----- Original Message ----- From: "Larry Bradley" > Using the internal reference (5v), the A/D will handle a voltage from 0 to > 5 volts, with the least significant bit being 5/1024 or about 5 mv. If you > use a 4.192 volt reference, the range will be 0 to 4.192 , with the lsb > being exactly 4 mv. 4.096v ref? -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.