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'[PIC]: ICD modified'
2000\07\04@031543 by Snail Instruments

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I have just finished a modified ICD, see http://www.vitrum.cz/snail/icd.htm

It is build on a single sided board. Complete schematic, silkscreen and PCB
pictures are published, also PCB solder side postscript file and Eagle 3.55
schematic and board files are available for download. Enjoy.

I also considered offerring kits, those would include all the parts, PCB
and preprogrammed PIC16F876 to solve the egg-chicken problem. Will there be
any insterest if they are priced at $39? Let me know.

Josef

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2000\07\04@083235 by Arthur Brown

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Thanks just Spent the weekend trying to get power suppy working So bin that
and start with this
Again thanks, Art

{Original Message removed}

2000\07\04@170452 by briang

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In-Reply-To: <.....3.0.6.16.20000704091341.34a71b22KILLspamspam@spam@mail.iol.cz>

Snail Instruments <snailspamKILLspamIOL.CZ> wrote:
> I have just finished a modified ICD, see http://www.vitrum.cz/snail/icd.htm

I don't understand why you have modified it. The original is much better because
it works without a 15V supply.

> It is build on a single sided board. Complete schematic, silkscreen and PCB
> pictures are published, also PCB solder side postscript file and Eagle 3.55
> schematic and board files are available for download. Enjoy.
>
> I also considered offerring kits, those would include all the parts, PCB
> and preprogrammed PIC16F876 to solve the egg-chicken problem. Will there be
> any insterest if they are priced at $39? Let me know.

To copy the Microchip software and then sell it would surely be illegal, or at
least morally highly dubious.

Actually come to think of it copying the idea and selling it is pretty dubious
morally.

Brian Gregory.
.....briangKILLspamspam.....cix.co.uk

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2000\07\04@171118 by Don B. Roadman

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On 4 Jul 2000, at 3:15, Snail Instruments wrote:

> I have just finished a modified ICD, see
> http://www.vitrum.cz/snail/icd.htm

I'm just finishing a wirewrap ICD, but wish I had waited so I could
use your pc layout. Great work and nice of you to share it.

BTW, I briefly looked at the schematic on your page. I didnt really
check it much, but I noticed one thing that might be an error, or
maybe its a microchip error that you have fixed. Anyway, you have
R33 shown as 10 Kohms, but in the schematic I got from
microchip, its shown as 100 Ohms. ??

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2000\07\04@173638 by Bob Blick

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> It is build on a single sided board. Complete schematic, silkscreen and PCB
> pictures are published, also PCB solder side postscript file and Eagle 3.55
> schematic and board files are available for download. Enjoy.

Thanks, it looks great! Last time I tried to get an ICD from Digi-Key they
were out of stock, I think I'll build one of these this weekend.

> I also considered offerring kits, those would include all the parts, PCB
> and preprogrammed PIC16F876 to solve the egg-chicken problem. Will there be
> any insterest if they are priced at $39? Let me know.

Selling kits has always seemed like a lot of work. You'll get a lot of
interest for free kits, though :-) Most people with money and credit cards
will opt to buy a Microchip ICD(if they can find one!).

Thanks again.

Cheers,

Bob

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2000\07\04@221012 by V sml

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Did you try getting it from advanced-transdata or its resellers?

http://www.adv-transdata.com

Cheers, Ling SM

>Selling kits has always seemed like a lot of work. You'll get a lot
of
interest for free kits, though :-) Most people with money and credit
cards
will opt to buy a Microchip ICD(if they can find one!).

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2000\07\05@023640 by Snail Instruments
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Hi Brian,

>> I have just finished a modified ICD, see http://www.vitrum.cz/snail/icd.htm
>
>I don't understand why you have modified it. The original is much better
>because it works without a 15V supply.

I just didn't like the idea that every project would have to provide some
50mA of spare power just for the few minutes (well, maybe hours :-) of
debugging. Since you need a PC anyway, I see no problem powering the ICD
from a wallwart.

>To copy the Microchip software and then sell it would surely be illegal,
or at
>least morally highly dubious.

We discussed this earlier when MPLAB 5.00 was released and the idea of free
ICD appeared. The conclusion was that hobbyist on a budget wouldn't buy ICD
even for $159. Furthermore Microchip doesn't make money on development
tools (at the seminar they called them the necessary evil). And Microchip
can still benefit even from homebrew ICD, in the long run.

I was of course aware of this issue, but once someone decides to spin off
his ICD clone, he has to put the code in the PIC somehow. Will it be less
immoral if he does it himself?

Josef


=======================================================================
Electronical devices for chemical laboratory, custom electronics design
-----------------------------------------------------------------------
Snail Instruments                      Josef Hanzal, M. S.
Vojanova 615                           phone/fax: +420-311-624433
266 01 Beroun                          e-mail: RemoveMEsnailTakeThisOuTspamiol.cz
Czech Republic                         URL: http://www.vitrum.cz/snail/
GPS: 49deg58'28" North, 14deg 4'35" East
=======================================================================

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2000\07\05@023649 by Snail Instruments

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Hi Don,

I believe both 100R and 10K are correct. If you have a look how RB6 and RB7
of the target are driven (signals are named RC3X, RC4X to ease up
orientation :-), there is 330R from the 'driving' pin and 10K to the
'sense' pin. ICD firmware undoubtly checks that the target does not
override applied signal levels. Since the R33 goes to the so far unused
RCX0 (supposed to drive target RB3), I guess the resistor value doesn't
matter at all. Even if the RCX0 is used in future firmware upgrades, the
sense pin will see correct level thru 100R as well as 10K resistor.

Josef

>BTW, I briefly looked at the schematic on your page. I didnt really
>check it much, but I noticed one thing that might be an error, or
>maybe its a microchip error that you have fixed. Anyway, you have
>R33 shown as 10 Kohms, but in the schematic I got from
>microchip, its shown as 100 Ohms. ??


=======================================================================
Electronical devices for chemical laboratory, custom electronics design
-----------------------------------------------------------------------
Snail Instruments                      Josef Hanzal, M. S.
Vojanova 615                           phone/fax: +420-311-624433
266 01 Beroun                          e-mail: spamBeGonesnailspamBeGonespamiol.cz
Czech Republic                         URL: http://www.vitrum.cz/snail/
GPS: 49deg58'28" North, 14deg 4'35" East
=======================================================================

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2000\07\05@023652 by Snail Instruments

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I thank to all, who have replied to my ICD post so far. I didn't mention I
am subscribed to the digest, so a carbon copy to TakeThisOuTsnailEraseMEspamspam_OUTiol.cz would mean a
faster response. But it was the Independence Day yesterday anyway, right?

Josef


=======================================================================
Electronical devices for chemical laboratory, custom electronics design
-----------------------------------------------------------------------
Snail Instruments                      Josef Hanzal, M. S.
Vojanova 615                           phone/fax: +420-311-624433
266 01 Beroun                          e-mail: RemoveMEsnailspamTakeThisOuTiol.cz
Czech Republic                         URL: http://www.vitrum.cz/snail/
GPS: 49deg58'28" North, 14deg 4'35" East
=======================================================================

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2000\07\05@131425 by jamesnewton

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Have you ever tried getting any response from Advanced-Transdata? They like
to ignore me...

...I can pick up the phone and talk to the bloody president of Parallax Inc
and at least to my FAE for Microchip but no human answers the phone or
returns emails from AT.

I'm curious as to the ownership of the ICD. Microchip makes its every detail
available in a pdf. The board says Advanced-Transdata. My sources say it was
designed by Microchip. At best AT has an option to produce it. Did you know
there are quite a few others?

http://www.propic2.com
http://www.magenta2000.co.uk/kits/900.htm
http://www.diversifiedengineering.net/Ed%20Board.htm

...just to start the list. How many more?

see
http://www.piclist.com/../microchip/icd
or
www.piclist.com/techref/default.asp?url=microchip/icd
for more.

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{Original Message removed}

2000\07\06@181402 by Jilles Oldenbeuving

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Or you could try Farnell... I have ordered a ICD, wich came in damaged. So i
send it back. They told
me the ICD's were out of stock, but yesterday i received an ICD from Farnell
(http://www.farnell.com)

Also, in the netherlands you could order one from Avnet SEI, who have told
me they have
the ICD's in stock! (i thought their site was http://www.avnet.nl / http://www.avnet.com
or a search would prove
otherwise :)


Regards,

Jilles Oldenbeuving
EraseMEjillesspamrendo.dekooi.nl
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Van: V sml <RemoveMEdecoderEraseMEspamEraseMEBIGFOOT.COM>
Aan: RemoveMEPICLISTspam_OUTspamKILLspamMITVMA.MIT.EDU <RemoveMEPICLISTTakeThisOuTspamspamMITVMA.MIT.EDU>
Datum: woensdag 5 juli 2000 4:12
Onderwerp: Re: [PIC]: ICD modified


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