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THVP

The THVP (Trivial High Voltage Programmer), designed by Byron A. Jeff, is a PIC programmer for the Parallel Port. It is similar to other Tait-style parallel port programmers. Byron's THVP page can be found here: http://www.finitesite.com/d3jsys/proghvp.html

I had been using my first one (built on a veroboard) for a few years, but wanted some real PCBs. So I started eagle (http://www.cadsoft.de) and layouted the schematic as a single-sided board that would be cheap to have made at a board house.

My THVP board already incorporates the “long cable termination scheme”. Since I designed the board to be used for ICSP (Microchip's name for in-circuit programming), I also designed a companion board (ICSP2DIP) where at least the 16,18,28,40pin DIP packaged PICs can be plugged in if your circuits don't have ICSP capability. (Well, I copied the schematic from Olimex's PG2C, but the layout is my own)

Here's how they look:

:thvp.jpg :icsp2dip.jpg
:thvp.png:icsp2dip.png

Construction Tutorial

Download

Here are the files in eagle format, gerber, and postscript:

Eagle Format

Gerber Format

Postscript Format

Software Support

I'm using Pikdev's commandline programming utility pkp with the THVP. Here's my .pkprc

 port=/dev/parport0
 type=parallel
 vpp=-4
 vdd=6
 clock=3
 datao=2
 datai=10

More Info

There's at least one thread about the THVP in my PHCC Forum:
http://forums.varxec.net/index.php?t=msg&th=141&start=0&rid=3

/var/www/html/data/pages/thvp.txt · Last modified: 2014/01/16 20:08 (external edit)