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PICList Thread
'Building a PIC Programmer'
1998\03\04@003927 by Vu Hoang

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Have any of you guys ever actually built a PIC programmer yourself or built
one of the PIC programmers from David Tait's site or any other site?

If you did, could you tell me if it works or if it was difficult to do?
I also plan to build a programmer myself, but I'm not sure if it's better
to build one that interfaces with the parrallel port or the serial port.

let me know..

Thanks
John

1998\03\04@011753 by Luberth

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Vu Hoang wrote:
>
> Have any of you guys ever actually built a PIC programmer yourself or built
> one of the PIC programmers from David Tait's site or any other site?
>
> If you did, could you tell me if it works or if it was difficult to do?
> I also plan to build a programmer myself, but I'm not sure if it's better
> to build one that interfaces with the parrallel port or the serial port.
>
> let me know..
>
> Thanks
> John

hello John,

i have build the parallel david tait programmer
one of the first prints i etched en soldered
it works good

i have only lower techn. school (car mechanics and metal construction)
so not much electrical background

so if i can make it anyone can!
good luck

luberth
--
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1998\03\04@041644 by Ints Mikelsons

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Hi,
I build D. Tait programmer too, but i must warn you - don't use long
connection wires to parralel port - it will cause unstable programmer work.
The optimal length of wires is ~ 0.5M.
If you have other questions - write.

1998\03\04@084258 by Leon Heller

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In message <3.0.3.32.19980304001259.007191ecspamspam_OUTmegahertz.njit.edu>, Vu
Hoang <@spam@vxh0334KILLspamspamMEGAHERTZ.NJIT.EDU> writes
>Have any of you guys ever actually built a PIC programmer yourself or built
>one of the PIC programmers from David Tait's site or any other site?
>
>If you did, could you tell me if it works or if it was difficult to do?
>I also plan to build a programmer myself, but I'm not sure if it's better
>to build one that interfaces with the parrallel port or the serial port.

I built the ultra-simple serial port programmer for the 16C84/16F84. It
works very well, and only took a few minutes to put it together. I've
also built a parallel port programmer, and that works fine.

Leon
--
Leon Heller: KILLspamleonKILLspamspamlfheller.demon.co.uk http://www.lfheller.demon.co.uk
Amateur Radio Callsign G1HSM    Tel: +44 (0) 118 947 1424
See http://www.lfheller.demon.co.uk/dds.htm for details of my AD9850
DDS system. See " "/diy_dsp.htm for a simple DIY DSP ADSP-2104 system.

1998\03\04@100146 by michaeljohn

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part 0 489 bytes
head>

Hi Leon,
yes, I built the Parallel Port Programmer "DT001" from DonTronics.
It works well, has a 'Load / Run' facility, and was quite easy to build.
Regards,
Michael.
> >Have any of you guys ever actually built a PIC programmer yourself or built
> >one of the PIC programmers from David Tait's site or any other site?
> Leon

1998\03\04@151630 by Dan Larson

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On Wed, 4 Mar 1998 00:12:59 -0500, Vu Hoang wrote:

>Have any of you guys ever actually built a PIC programmer yourself or built
>one of the PIC programmers from David Tait's site or any other site?
>
>If you did, could you tell me if it works or if it was difficult to do?
>I also plan to build a programmer myself, but I'm not sure if it's better
>to build one that interfaces with the parrallel port or the serial port.
>
>let me know..
>
>Thanks
>John
>


I have built David Tait's paralell PIC programmer and also a YAPP PIC
programmer.
The YAPP programmer is serial port based. It uses true RS-232 communications,
although the programming process is much slower than David Tait's.



*******************************
* Dan Larson                  *
* Software Engineer           *
* Micro Control Company       *
* email: RemoveMEdlarsonTakeThisOuTspamcitilink.com *
*******************************

1998\03\04@214233 by john pearson

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At 12:12 AM 3/4/98 -0500, you wrote:
>Have any of you guys ever actually built a PIC programmer yourself or built
>one of the PIC programmers from David Tait's site or any other site?
>
>If you did, could you tell me if it works or if it was difficult to do?
>I also plan to build a programmer myself, but I'm not sure if it's better
>to build one that interfaces with the parrallel port or the serial port.
>
>let me know..
>
>Thanks
>John
>
>
John
I just built a scaled down version of a parallel port design from Tato
Computers. The design and Windows software are available at
http://www.geocities.com/SiliconVally/Pines/6902/index.htm. I used 3904 and
3906 transistors. It worked very well first time, wich I can't say about
others I tried.
The software is really great. It will program a lot of different pics if you
want to build the whole thing.
I left out the Vpp2 and production circuits. Built it on a breadboard.

John

1998\03\04@220401 by Mark S.

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I tried to load this page and got a "page doesn't exist error!

At 06:39 PM 3/4/98 -0800, you wrote:
{Quote hidden}

1998\03\04@223243 by Ross McKenzie

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At 08:02 PM 3/4/98 -0700, you wrote:
>I tried to load this page and got a "page doesn't exist error!
>


www.geocities.com/SiliconVallEy/Pines/6902/index.htm
                                   ^ that should help.

Regards,

Ross McKenzie
Melbourne Australia

1998\03\05@054017 by wkysag

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On  4 Mar 98 at 20:02, Mark S. wrote:

> I tried to load this page and got a "page doesn't exist error!

http://www.geocities.com/SiliconValley/Pines/6902/

works for me. You may find links to this and other PIC
programmers on
http://people.frankfurt.netsurf.de/Wolfgang.Kynast/pic.htm

Regards,
Wolfgang
--
Rund um's Geld:
people.frankfurt.netsurf.de/Wolfgang.Kynast/

1998\03\06@145645 by wouter van ooijen

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I've build one of the ultra-simple PC serial port 16c84 programmers (a few
resistors & zener's and a 5V supply), and (with my 486 PC, com84 and pip02)
it worked fine. I've designed my own (based on a 16c84) and that also works
fine. Programming a 16c84/16f84 is quite easy.
Wouter.

----------
> From: Vu Hoang <spamBeGonevxh0334spamBeGonespamMEGAHERTZ.NJIT.EDU>
> To: TakeThisOuTPICLISTEraseMEspamspam_OUTMITVMA.MIT.EDU
> Subject: Building a PIC Programmer
> Date: Wednesday, March 04, 1998 06:12
>
> Have any of you guys ever actually built a PIC programmer yourself or
built
> one of the PIC programmers from David Tait's site or any other site?
>
> If you did, could you tell me if it works or if it was difficult to do?
> I also plan to build a programmer myself, but I'm not sure if it's better
> to build one that interfaces with the parrallel port or the serial port.
>
> let me know..
>
> Thanks
> John

1998\03\07@141428 by david

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On Wed, 4 Mar 1998 00:12:59 -0500, Vu Hoang wrote:

>Have any of you guys ever actually built a PIC programmer yourself or built
>one of the PIC programmers from David Tait's site or any other site?
>
>If you did, could you tell me if it works or if it was difficult to do?

<snip>

I have recently built David Tait's TOPIC board for PIC 16C84.  I
wanted to find out about PICs, and a combined programmer and project
board seemed a good way to go.

Does it work?  Yes, it seems to work well - I have to say seems
because in the few weeks since I built it I have been too busy to play
with it much, but I have programmed it with David Tait's test program,
using his software to transfer the code from the PC, and it does what
it is supposed to do.  

Was it difficult to do?  No, but it does depend on where you're
starting from - most things are easy if you know how and have the
right tools.  For anyone with experience of constructing electronic
projects this is a fairly small and simple project to complete, but
I'm not sure if I would recommend it as anyone's very first project
since it does involve hardware, and software, and a communications
link to the PC.

The package provided (free!) by David Tait is excellent - it includes
a written description, a circuit diagram, a photograph, a component
layout diagram, a PCB foil pattern (300dpi, PaintBrush-compatible), PC
software to drive the programmer and a simple test program.  I have
paid good money for much poorer materials, and I think we should
grateful that people such as David Tait are willing to make their
efforts freely available.

If you can make a small, single-sided PCB then this is the way to go.
If you can't, then other construction methods would probably work but
a beginner might be better advised to buy a kit.  In the UK, Maplin
Electronics sell a kit based on David Tait's design - but I don't know
anybody who has built one.

There are various ways of transferring a design onto copper, including
copying it by hand.  I used photosensitive laminate with a
transparency made by laser printing the image onto film.  I had
thought that I would able to use the clear film which is widely used
for printing overhead projector transparencies, but the image quality
was not good enough and I had to get hold of some matt film intended
for pcb artwork.  That was excellent.  Of course, any film you use in
a laser printer *must* be special film intended for laser or
photocopier use - ordinary film will melt and could do expensive
damage.

At the first attempt I found that some of the pads on David Tait's pcb
layout were a little delicate for my rough and ready manufacturing
techniques, so I loaded it into PaintBrush and added some copper.  The
second one was fine.  I don't intend this as a criticism of the design
- I'm sure that if I had a vertical stand for my mini-drill and used
good, sharp drills of the right size for each hole there would be no
problem.

David Tait gives the wiring details for a lead to connect the TOPIC to
your PC's 25 way D-type parallel/printer port.  With my setup it is
more convenient to use a short adapter with a female 36 way Centronics
connector which plugs into the end of a standard printer cable which
is permanently connected to the PC. The connections are:

    TOPIC 10w
  IDC Connector          36w Centronics
  -------------          --------------
      pin 1                  pin 31
      pin 3                  pin 2
      pin 5                  pin 1
      pin 7                  pin 14
      pin 9                  pins 11 & 36
      pins 2,4,6,8,10        pins 19 - 23 (all ground)

As well as the software to drive the programmer, which is provided,
you will need an editor to write your own programs and an assembler to
prepare them for downloding to the PIC.  The editor in current
versions of MS-DOS is quite usable, and the MPASM assembler can be
downloaded free from the Arizona Microchip website as can its user
manual (DS33014F).  Beware - the manual is a hefty 160+ pages in Adobe
PDF format.  Another useful document is the PIC16C84 Data "sheet"
(DS30445C) - 109 pages including a lot of stuff you probably won't
want but also including essential material such as descriptions of the
registers and the instruction set.  There are also some useful and
instructive application notes on the site.  If you have some low-level
programming experience then the free documents may be all you will
need, if not you will need to buy one of the beginners' books you will
see referred to from time to time.

Good luck!


--
David Waterhouse <RemoveMEdavidspamTakeThisOuTdavespc.demon.co.uk>

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