> You might understand, for a first
> What should I know about building one to program the 18LF4320 
> involved in my solar tracker design?

Those very simple circuits *can* work. Which implies that (depending
mainly on your serial port, but if Murphy gets its way also on the phase
of the moon) they might also not work. According to piclist lore, waving
a dead fish might help. (sorry, inside joke)

The next step up in the foodchain is a progger that uses the serial port
as communication port, as it is meant to be. To quote Olin, Wisp628 is
the bare minimum circuit that does that. Again stepping up in the
foodchain there are proggers that derive Vpp (the programming enable
voltage) in a more robust way, pickit2 is a nice example. There are a
lot of higher steps, but I am not sure you are interested.

>  I would like it 
> especially if there was a circuit that could be easily 
> converted to also do serial communication with the chip 
> later! 

Wisp628 does that, IIRC pickit2 in its latest incarnation also does this
(but it lacks the extra two wires of a Wisp628, so you can't use the
PICs UART).

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
 
 

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