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DIY TDA1541A PCB "D3"

Would you like a through hole version of the D3?

  • Yes

    Votes: 12 52.2%

  • Maybe, depends on the performance

    Votes: 11 47.8%
  • Total voters
    23
  • Poll closed .
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#1,401
Yesterday, I read the whole topic again.
And I must say, since I had to study some of the schematics reading it all over again. And that made it much more clear to me.

I ordered some parts at mouser, now just have to wait till it arrives, and on with the testing.
Especially with the IV resistor, since I read this value can make a difference sound wise, in combination with the pre-amp it is connected to.
So different values I've added to the order, to test with.

(Thanks again @Supersurfer for all the input!)
 
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#1,402
Can anyone tell me how much current one D3 board and the glue logic board draws?

I know the D3 uses +5V and +26V but not sure how much current is draws. The same for the glue logic board, I know it uses +5V but not sure how much current it'll draw with one board vs two, or four.
 
#1,404
It's alive!

IMG_20250601_104145.jpgIMG_20250601_104130.jpg

It turned out that the only thing in the whole project that I messed up what's the wrong IC on the i2s to continuous board.

So I replaced it, hooked everything up. And there was music.

I did learn to understand a lot more about the whole schematics, so the failure was worth it.

It sounds way better than I dared to expect when I started it.

And some tweaking can and will be done in the nearby future. After that make a nice housing!
(Something I always enjoy when the end result is achieved)
 
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#1,406
Avalfa said:
It's alive!

View attachment 1467476View attachment 1467477

It turned out that the only thing in the whole project that I messed up what's the wrong IC on the i2s to continuous board.

So I replaced it, hooked everything up. And there was music.

I did learn to understand a lot more about the whole schematics, so the failure was worth it.

It sounds way better than I dared to expect when I started it.

And some tweaking can and will be done in the nearby future. After that make a nice housing!
(Something I always enjoy when the end result is achieved)
Click to expand...
I'm interested in how much current each board id drawing so I can configure the salas regulators, What values did you see?
 
#1,407
Oh I didn't t measure.

Just followed Ryan's lead, approx 145mA per board and some xtra.
It was a bit of tweaking before I had the load resistor right.

1.2 ohm turned out te be to high ( calculated 500mA total) couldn't get it above 25V

0.8 Ohm turned out to be workable but it became quit hot ( above 65-70 degrees C) (calculated 730mA)

So I changed it to 1 Ohm and now perfectly stable and Max 50 °C .
In the future housing it will have a nice big coolrib, so no problem I guess.(Calculated 600mA)
 
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