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'[PIC]: JDM programmers, build or buy?'
2003\06\24@033317 by Iain Duncan

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Hi, I'm wondering what folks think about building your first programmer if
you have little to no electronics experience. Is it just asking for
unnecessary frustration? Specifically I am thinking about building the JDM
programmer or buying the Olimex PG2C version.

Thanks,
Iain Duncan

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2003\06\24@034617 by

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We are talking of a programmer for PIC's, right ?
I read this as you are starting with PIC's with
"little to no electronics experience". I'd say that's
a greater challenge than building the programmer !
Maybe you *should* build the programmer to build up
at least *some* "electronics experience"...

Jan-Erik.

Iain Duncan wrote :
>Hi, I'm wondering what folks think about building your first programmer if
>you have little to no electronics experience. Is it just asking for
>unnecessary frustration? Specifically I am thinking about building the JDM
>programmer or buying the Olimex PG2C version.

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2003\06\24@081252 by John Nall

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At 12:23 AM 6/24/2003 -0800, you wrote:

> >Hi, I'm wondering what folks think about building your first programmer if
>you have little to no electronics experience. Is it just asking for
>unnecessary frustration? Specifically I am thinking about building the JDM
>programmer or buying the Olimex PG2C version.

Assuming you have not already decided, you might check out the Wisp628 at
http://www.voti.nl/wisp628/index.html

It comes in either kit form or preassembled.  I bought the kit, and had no
problem with building it (took about an hour).   Reasonably priced and I
use it with both Windows98 and Linux (Redhat 8.0).

Cheers,
John

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2003\06\24@082258 by Hugo Harming

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Hello Iain!

I started out building a few Tait style programmers, and they worked ok in Win9x. But getting them to work reliably and with reasonable speed under a NT-based OS is not trivial. Also, they are not very good at in-circuit programming.
I ended up buying a kit from Wouter (http://www.voti.nl) of his Wisp628. It's a HVP programmmer with a serial interface and a nifty serial passthrough function. I absolutely love it.
If you need to program PICs out of circuit, it's easy enough on a solderless breadboard. An adapter for various package sizes would also be easy to make.

Oh btw, it's cheap too!


Regards,
Hugo (not associated with Wouters business in any way)





{Original Message removed}

2003\06\24@115109 by Byron A Jeff

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On Tue, Jun 24, 2003 at 09:39:28AM +0200, Jan-erik S?derholm (QAC) wrote:
> We are talking of a programmer for PIC's, right ?
> I read this as you are starting with PIC's with
> "little to no electronics experience". I'd say that's
> a greater challenge than building the programmer !
> Maybe you *should* build the programmer to build up
> at least *some* "electronics experience"...

Agreed. Some addtional points:

* What novices often find difficult is the fact that development is an
 interative process. They often expect that once they connect the dots that
 everything will "just work". It rarely does. Once has to be systematic
 and patient.

* Start simple. My series of trivial programmers are designed to be easy and
 cheap to build. CHeck them out here: http://www.finitesite.com/d3jsys

BAJ

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2003\06\24@155821 by John Brown

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My advice if you are just starting out using Pics is not to build a JDM type
programmer, it works very well on the older Pics (16f84 etc.) but does not
work very well on the newer Pics such as the 16f628, 12f629  etc..  I
suspect that the serial JDM2 type circuit can also damage the newer Pic
chips. If you have any doubts then have a look at the IC-Prog message board
which contains regular tales of woe from people struggling to get 16F628s
etc working with the JDM programmer.
Go for a programmer which is designed to work with the newer Pics, some of
the old home build designs are not up to the job.

John PB


> Hi, I'm wondering what folks think about building your first programmer if
> you have little to no electronics experience. Is it just asking for
> unnecessary frustration? Specifically I am thinking about building the JDM
> programmer or buying the Olimex PG2C version.
> Thanks,
> Iain Duncan

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2003\06\24@170613 by Larry Williams

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I kinda agree but I also kinda don't. If someone is "just getting
started" with pics, the "JDM" type programmer is a good inexpensive way
to "get Started" It programs a lot of chips that can perform lots of
jobs, including "learning pics". I have one, and when used for what it
was intended for, it works quite well. I bought mine before I knew it
was a JDM programmer. I got it from Olimex for about $6 or so. It is
still quite useful in the field for a lot of jobs. I have a microchip
programmer, a couple of other programmers that will program not only
pics, but many other controllers, as well as eproms. The one I like the
best though and the one I use for most developement is the EPIC. I have
two of those, one for work, and one for the bench at home.

John Brown wrote:
{Quote hidden}

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2003\06\24@171445 by

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OK, guys, what the h-ck does "JDM" stand for ?
And what is specific with this "type" of programmer ?

I though it was a *brand* of a specific programmer,
but it doesn't look so from the post below...

Jan-Erik.

Larry Williams wrote:
>... the "JDM" type programmer is a good inexpensive way
> to "get Started"

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2003\06\24@172522 by Iain Duncan
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It's a design by Jens Dyekjfr Madsen for a really simple programmer powered
only from the serial port. Some good detail can be found at:

http://www.jdm.homepage.dk/newpic.htm
http://www.ucapps.de - look at JDM module, Thorsten recommends them for
making midi stuff cheaply.

This is the same general design as the Olimex PG2B programmer.

Iain


{Original Message removed}

2003\06\24@194024 by William Chops Westfield

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>    It's a design by Jens Dyekjfr Madsen for a really simple programmer
>    powered only from the serial port. Some good detail can be found at:
>
>    http://www.jdm.homepage.dk/newpic.htm

OH!  The PP2.  Why didn't you SAY so...

I recently translated his PCB/Schematic for this into Eagle, if anyone is
interested.  (this has not been tested, though.  Strange how I seem to have
all this time to lay things out, and so little time to actually build and
test stuff.  Sigh.)  The design rules are actually a bit "fierce" for
beginner home methods, though, IMO (ie traces between pins.)  You may be
better off using rats-nest or pseudo-wire-wrap...

BillW

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2003\06\25@154143 by Patrick Cantwell

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I have the olimex PG2C, which is the same as the PG2B but with an ICSP
header.. essentially the JDM design.  I picked it up on eBay for a few
dollars, and am completely pleased with it.  I've programmed a few 16F628
parts with no woes (maybe I'm just lucky?) under WinXP, several
16F877/877A, and a couple of 18Fxxx parts.. it's cheap, which makes it a
great starting point if you are in a situation where you want to learn
PICs but don't have a lot of money.. I don't want to admit to how long it
took me to save up the money for a decent compiler =)

The only downside is the lack of support for certain parts in ic-prog (the
16F628A and the 16F819 to be precise), but good things come to those who
wait :)

-Pat

On Tue, 24 Jun 2003, Larry Williams wrote:

{Quote hidden}

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