peter green wrote: > P.S. be very careful when using a programmer originaly designed for 5V > pics on 3.3V pics. The 12v on Vpp used for programing mode entry on > the 5V pics is harmful to 3.3v pics. Very true. This is one reason we created our LProg PIC programmer (http://www.embedinc.com/products/lprog). It only handles the 3.3V PICs and never produces higher voltages. It is therefore incapable of blowing up a 18FJ or other 3.3V PIC by accidentally applying 13V on MCLR or 5V on Vdd. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist