non-profit ver.3 TDA1541a DAC for limited budget diyers

[gomi2]

anyone got this files ?

manual1
manual2.doc

about Thomas dac

thanks a lot

[Jean-Charles]

Gomi, j'ai le manual_2
Trop gros pour le forum.
Envoie moi une adresse privee
Jean-Charles
audio@ve2jc.com

[Landoctor]

I would really appreciate a copy of the manual of you have it also.
Thanks for your time,
Donovan

[chungtat]

Here you go. But they are in Chinese.

[samoloko]

Is there a schematic for v. 2 and v. 3

[Jean-Charles]

Gomi,
Landoctor,
Samoloko.

Chungtat has just posted the manuals that I have. Mine are in Chineese too, so I will not duplicate the information.
There are translators online that can help. Google and Yahoo are free.
I have a few diagrams. I include 5, this is the maximum I can upload with this post. I will complete with the next.

[Jean-Charles]

Theese are the last 2, I have.
I will keep looking.
I just found More complete informations. I can not post here because it is almost 2 megs large. So Gomi and Landoctor, I will PM to you.

[samoloko]

thx for schematics

I would like to see final v. 2 with recloking as I suspect that was best
you can upload at rapidshare, so on free servers

regards

[Jean-Charles]

As a general information, I will refer you to post 1930 and 1932 and all others before and after.
I gave a list back then of other posts that could be of interest for diagrams and settings.
I saw Gomi and Donovan there too.
Thomas is not available anymore, but I found something very interesting.
Search in Google for a commercial product called: Satch DAC.
This is Thomas's dac right there.
So I beleive Thomas has turned commercial. Anyway, with further reseaches on Satch dac, you may find pertinent informations to help you with your present dac. Let us know what you find.

[SamL]

Originally Posted by Jean-Charles

I just found More complete informations. I can not post here because it is almost 2 megs large. So Gomi and Landoctor, I will PM to you.

Hi Jean,

Appreciate if you can send me a copy
samshlim at yahoo.co.nz

Also, have you tried the fix suggested by ecdesigns?
I am stuck with the pin numbering. His inst:

*---
SN74HC04 could be used for this, SN74HC04 pin numbering, notch to the top, top view:

pin top left is pin1, next one down is pin 2, and so on, until pin 7 (bottom left)
pin8 (bottom right), next one up is pin9 and so on, until pin14 (top right) .

ADDING THE INVERTER:
> Connect GND (SAA7220 socket pin 12) to the following pins of the SN74HC04: pin3, pin5, pin7, pin9, pin11, and pin13.
> Connect VCC (SAA7220 socket pin24) to SN74HC04 pin 14.
> Solder a 100nF decoupling capacitor between SN74HC04 pin7 and pin14.
> Connect pin1 of SN74HC04 to pin3 of J28 (DATA).
> Connect pin2 of SN74HC04 to pin3 of J25 (Inverted DATA).

John

*-----
Well, The SN74HC04 that come with the Thomas DAC is 16 pin version not 14. Do you know how to to apply ecdesigns fix to a 16 pin version?

Appreciate your help.