On Thu, Apr 17, 2003 at 04:45:00PM +0800, WH Tan wrote: > I had build a programmer for PIC16F87x series. It is almost same as 'Tait > parallel programmer' with some changes, because of the parts availability. The first check after verifying voltages/wiring (which you said you did in another post) is cable length. You're begging for trouble if your cable is longer than 18 inches (0.5m). What's the length of your cable? The second thing is that you said you checked your voltages. Exactly what voltages did you get on each of the lines? BAJ -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads