To put the processor into HVP mode put 5V on Vdd, 0V on Vss, between 12V and
14V on MCLR, and 0V on RB4.
  -----Original Message-----
  From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Kieren Johnstone
  Sent: Friday, July 19, 2002 6:13 PM
  To: PICLIST@MITVMA.MIT.EDU
  Subject: [PIC]: Flashing LED Pt. III


  Hi,

  Thanks all for your ongoing support!  Please find attached "V3" of the
circuit!!  Also, I have a question about a programmer I can use.  After some
investigation I found the "PARPIC" programmer, as found on
http://people.man.ac.uk/~mbhstdj/piclinks.html (download FPP if you want,
it's got schematics etc.!).  Anyway, I was wondering if I could use this
design directly, or adapt it somehow to work with the PIC16F877?  I'm also a
little confused about the 12V "programming voltage"... is it required if I
power the PIC as it would be during regular operation (the V??, MCLR pins at
5V etc.)?  Can I use a small 12V alkaline battery (I think it had about
20mAh..).

  Thats a spicy meatball,
  Kieren (toodleoo)

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