a couple of quick questions... I use the 7805 to regulate my 9vdc wall supply to +5vdc, but it's off a little. +5.05vdc I have a 10uf ceramic cap between the +5vdc output and ground. This brings the out put up to +5.05 from 4.90 vdc. The question is how do I tweak this to get +5vdc ? --just change the value of this capacitor, or are there other little things that are normally done? or is this as accurate as these things get? I don't really care, and I don't think this matters does it? But, secondly, I want to know if there is a 780x (2) for giving you +2vdc? I have finally gotten back to my AtoD setup using, Vss--Vref- and +2vdc--Vref+ it is working fine, using a 200 ohm and 300 ohm volatge divider, and that what I will use for now, I wanted to ask these questions before I forgot, thanks when talking before about this Vref+ for A/D someone mentioned precision voltage sources, is this refering to something like the 7805 for +5vdc ?? thanks for any info btw the A/D works great, thanks to all from before, jinx, russell, and all (it's the only damn thing I can really check with my meter only workshop.....) -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics