DIY Analog-to-Digital Converter project.Audio measurements tool

[mikefatom]

Originally Posted by Frex

Hello all,

As i had already say in my previous post, the 10M resistor can be any tolerance (1-5%).It's not critical. Just use metal film resistor, no carbon type.
Tolerance noted in the BOM is a mistake. Sorry.

AR2, i'm glad you finally got your PCB !
Now you can start the job

Valeriano have finish his wiring and seem to have a working ADC (correct me if i'm wrong).He has report me a mistake concerning the two resistor R49 and R50.
(divider of the LT1963 voltage regulator).
For proper work you should solder as below :
R49=750 Ohms (but no 249)
R50=249 Ohms (but no 750)

I will notify that on the wiki page for all users.

AR2, i already have built two audio DAC , they just has not been described on the forum yet.
Just two pictures for you.





Regards.

Frex

Hello Frex,

Where can I read more about this project? This DAC looks very versatile! How did you implement the USB connectivity?

Thanks,

Mike

[Frex]

Hello,

Unfortunatly, the web site that i had started to design some month ago is not yet ready and i don't have described this project on DIYaudio.
Probably because many DAC design has already designed and described on DIYaudio !

But yes, this DAC is very versatile.
The USB input use the very common PCM2906 that allow only 16bit/44-48kHz operation, but the internal
DACs are dual PCM1792A in mono mode with fully differential operation.
Optical and coax input can handle 24bits/192kHz.
The DAC can be controlled (digital volume and mute) with any RC5 compatible remote control.

If you are interested by the project, i have some bare PCBs of this design that i can sale. Of course, all design files will be provided.
If many DIYers ask me, i could also strat a dedicated thread.

HERE, you can read the full schematics.

Regards.


The PCB view :



The internal view:




FRex