Hi, > Would it be silly of me to suggest a current mirror? > A pair of transistors, and a couple resistors. Could you elaborate that ? It is not obvious to me how a current mirror can be used in this application. best regards, Alexandre Guimaraes -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist