I have tried several size pots from 1k to 100k. The results are all the same. Even digital pots ----- Original Message ----- From: "Andy Kunz" To: Sent: Saturday, December 21, 2002 8:58 AM Subject: Re: [PIC]: > What size pot? You need to meet the impedance requirements. You also > should have a big cap on it, especially with newer chips I've found. > > Andy > > At 01:57 AM 12/21/02 -0500, you wrote: > >I have been using PIC chips for a while and it seems that every time I use > >the VRef option when working with AtoD ports on the mid and high end chips I > >cant get the readings to settle down. I get a rough range of +-5 on my > >readings. I I tie the Vref to VCC or disable this option it works ok. > > > > > >Is there any hard and fast rules for using this option. > > > >-- > >http://www.piclist.com#nomail Going offline? Don't AutoReply us! > >email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > -- 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