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Old 8th May 2017, 10:52 PM   #11
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there is a real dearth of good multichannel DACs done right.
Hopefully there is a path to that here.
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Old 12th May 2017, 01:29 PM   #12
isiora is offline isiora  Italy
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Default ESS9038PRO

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Originally Posted by bsy020 View Post
I'm definitely interested. How did you do all of this all by yourself?
I think the firmware alone is so much work. I would really love to see
it work with ES9038pro.
Thanks for sharing.
Me too . Thanks for your interest.
I would like to gather a significant number of people interested in, before working to the design again. I would be happy if I could define a kit that allows anyone to build it. The ESS9038PRO is easily adaptable changing very few components, but maybe it deserves a separated project in order to get the best from it.

There are several things that should still be done in the current design:
  • the LCD display interface (I setup the hw interface, it needs the firmware, that it is nothing compared to all the firmware already developed)
  • the firmware for a Pmod wifi module
  • the remote control and a digital volume knob (via an encoder) to use when the DAC is not used as a DLNA DMR

Bye,
Isidoro
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Old 13th May 2017, 08:43 PM   #13
Bfpca is offline Bfpca  Canada
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Isidoro

All I can say is wow! That's a very impressive effort. I am mostly an analog electronics person so I am in awe of your digital design and programming knowledge. I think you would get more traction on here if the project specifically targeted the 9038. There is a lot of positive buzz about the 9038 now that commercial products are being evaluated. Folks are more likely to sign on to a project where the latest Dac chip is featured.
I for one am interested and will be following your progress.

Last edited by Bfpca; 13th May 2017 at 08:44 PM. Reason: Typo
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Old 14th May 2017, 02:21 AM   #14
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Thanks for sharing. A very nice design indeed.
Love the synchronous mode with 45.1584 and 49.152 clocks.
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Old 15th May 2017, 06:54 AM   #15
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In the block diagram, you show an I/V stage. How/why did you choose this? To the best of my knowledge, the ES9018 is voltage out.
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Old 16th May 2017, 07:42 AM   #16
isiora is offline isiora  Italy
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Quote:
Originally Posted by hollowman View Post
In the block diagram, you show an I/V stage. How/why did you choose this? To the best of my knowledge, the ES9018 is voltage out.
The ES9018 analog output is a differential current output equivalent to a voltage source with approximately 780Ohm in series. The full scale out is 3.9mA pp.

Cheers,
Isidoro
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Old 16th May 2017, 07:57 AM   #17
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Nice work, except for the tantals - why use conflict minerals?
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Old 16th May 2017, 07:53 PM   #18
isiora is offline isiora  Italy
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Nice work, except for the tantals - why use conflict minerals?
I agree! I already planned to substitute them with polymer aluminium caps, hoping that I don't lose their damping action.
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Old 16th May 2017, 09:05 PM   #19
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Default Conflict materials ... get real!

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Originally Posted by isiora View Post
I agree! I already planned to substitute them with polymer aluminium caps, hoping that I don't lose their damping action.
Yeah and toss out your Smartphones and iPads while you're at it.
All you bloody Europeans and your pretentious, politically-correct ideologies!
I'm from the US of A and Trump is my prez...nicely dissolving decades of rubbish EPA protectionism.
...And I want all that poisonous Pb back in my solder so I don't have to landfill my device 'cause it stopped workin'!!
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Old 16th May 2017, 09:55 PM   #20
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Originally Posted by isiora View Post
I agree! I already planned to substitute them with polymer aluminium caps, hoping that I don't lose their damping action.
Wouldn't that take quite a bit more space though? Very impressed with this project btw!
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