A circuit diagram would be a REALLY good idea. A partitor MAY be a simple device but until we know what it is then we don't understand the question. IF it is a divider consisting of two resistors then it would be very wise to fully describe how each resistor is connected so that there is no uncertainty OR provide a diagram. At the moment people (including me) are "wandering around in the dark" because the circuit description is uncertain. Russell -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist