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-   -   High Performance WM8741 Upsampling DAC New Version build thread (show 'n tell too) (http://www.diyaudio.com/forums/digital-source/204641-high-performance-wm8741-upsampling-dac-new-version-build-thread-show-n-tell-too.html)

merlin2069er 16th January 2012 07:09 PM

High Performance WM8741 Upsampling DAC New Version build thread (show 'n tell too)
 
I'm looking forward to building this dac...

Thanks heartwinter!

Turbon 16th January 2012 07:19 PM

Agree! Let's find out what it can do soundwise.

Brgds

Turbon 17th January 2012 12:00 PM

Got my boards today - at first glance - quite OK. There might be some very thin ground lines but I have to have a closer look about if anything is loading those. The smaller through holes are drilled quite randomly :-). Not a big deal though - if the design is OK the drillings won't hurt the sound.

Good luck everyone and please share your findings.

Brgds

regal 22nd January 2012 11:43 AM

My tracking seems stalled, I was expecting the boards by now.

Is everyone planning on the hifidino controller?

I think if using the software controller the upsampler is best jumpered if using a computer transport, since all 15 filters will be available, and multiply that by 3 if you include the dither settings. So 24/192 with 45 differing over sampling algorithms programmed by the pros.

Should be an interesting project should the boards make it thru customs.

merlin2069er 22nd January 2012 01:33 PM

I'll be using my mega arduino with lcd display.

merlin2069er 22nd January 2012 03:05 PM

BOM
 
I've started creating BOM listings with mouser... I'm sharing it here (it's not complete by any stretch) but it's a start.


To access the shared mouser bom listings... go to ;

Mouser Electronics - Electronic Component Distributor. Under Project and cart sharing...

Enter '6586cd42e9' for wm8741 digital receiver 1 -- missing pin headers - not sure of size

Enter '40fde56eec' for wm8741 digital receiver 2 -- missing pin headers - not sure of size & crystal

Enter 'e31d00d376 ' for i2c level shifter -- missing pin headers

Enter '27ccd0aaa1' for super mini dac v2.0 -- just started this one


If you get any further than I have please share your results.

If you find any errors, please keep me posted.

Thanks.

regal 22nd January 2012 03:12 PM

Thankyou, any opinions on the least expensive Auridino unit to buy that will work with this and the remote and lcd?

randytsuch 22nd January 2012 06:25 PM

Quote:

Originally Posted by regal (Post 2873571)
Thankyou, any opinions on the least expensive Auridino unit to buy that will work with this and the remote and lcd?


Looking at the Hifiduino website, looks like the code is written for the Uno/Duimilanove type Arduino's (ones based on the 328 chip).

Looks like you can pick up a Duimilanove for around $20 these days. They have technically been replaced by the Uno, but they should work fine for this project.

For the display, he used a I2C LCD, which kind of limits the choices, and I think is slightly more expensive then the standard parallel interface one. The problem with the parallel interface is it uses a bunch of the data pins. It depends how much, if any other stuff you want need. I think a parallel interface would work OK, and you still have a few other digital pins if you need them.
There are a few lines are init code that would have to change, and you would need pots to adjust brightness and contrast.

Randy

randytsuch 23rd January 2012 04:22 PM

Please disregard the LCD stuff in my previous post

The arduino code supports both I2C and parallel LCD's, so you can use either.


Randy

regal 24th January 2012 04:57 AM

The recommended silver apple remote makes no sense, it has 5 buttons, but looking at the code there are many more. I think this is meant for the Sony remote?


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