ivp wrote: > Or get a programmer with enough drive capability to power the > whole circuit, such as Olin's (see link below). I think some can > supply 500mA or more The ProProg can deliver 500mA target current if you give it solid input power, otherwise it can to 250mA with the supplied wall wart in the US. Ou= r USB programmers (USBProg, USBProg2, LProg) can all do 100mA Vdd current. > A possible problem there is that some programmers > verify at Vcc lower than your specific 5V. I'm sure Olin can > advise you on pitfalls and workarounds Our variable-Vdd programmers (ProProg, USBProg, USBProg2) verify at the Vdd limits of the target chip by default. That can be as wide a range as 2.0 t= o 5.5 volts. However, this can be disabled with the -VDD command line option to PIC_PROG. The LProg performs all operations at 3.3V. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .