Lewis, I myself have used the PICstart Plus to do ICSP many times. I built a home made connector, one end goes to a 40 pin IC socket while the other end goes to a 5 pi n connector. Just make sure you isolate the rest of the circuit before you progr am the device. Best Regards, Steven ******************************************************** Steven Kosmerchock Engineering Technician CELWAVE Phx Az USA email: steve.kosmerchock@celwave.com ******************************************************** www.geocities.com/researchtriangle/lab/6584 ******************************************************** ---- PICLIST(a)MITVMA.MIT.EDU's Message ---- Is the PICstart Plus programmer suitable for programming devices in-circuit with a hand-built adapter/cable for the device being programmed? I seem to recall that some of the "home brew" programmers that I read about on the web, did not have the current capability to do this due to the length of the inconnection cable / capacitance etc. Thanks Lewis