> 3-30V+ > | > | > R1 > | > +------+------+--------> AN0 input > | | | > | | | > R2 R3 R4 > | | | > | | | > AN1 AN2 AN3 > Thanks, Dwayne. That's a good idea! It adds a little capacitance, but that's just sampling time. I like that better than my idea anyway. Also, it let's me do neat things with measuring, since I can then connect multiple ANx's as grounds, giving a much broader range of resolutions. Andy ================================================================== Andy Kunz - Statistical Research, Inc. - Westfield, New Jersey USA ==================================================================