Low cost ES9018 Dac - Builders Thread

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#322
Added 2x15v preregs for analog part and one 5v for digital. Another 2 regs with separate transformer for USB to I2S jlsounds interface.
Inside cabling not finished. I have in plan to install also an output relay to avoid on-off thump that appears.

An externally hosted image should be here but it was not working when we last tested it.


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#323
atupi said:
This is my almost finished DAC discussed in this thread. I added some more preregulators and i'm trying to find a good grounding scheme for everything inside the case.
The most annoying problem is when i'm electrostatically charged and discharging on dac case my microcontroller goes crazy and display shows
hieroglyphes.
I will go in details with my final configuration if there are still interested people in this subject.
Click to expand...

Sure atupi.

Still waiting for the last bits as I made a misstake ordering them in the same batch as hard to get R values for another project. May 14'th is the last answer but sure I have ordinary 1% mf so I coud test it. Show your internal setup and there wil be folks to scrutineze it 🙂. Oh sorry - You did... Is your IEC ground connection connected to case?

Regards and thanks to your crew 🙂
 
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#325
Well, i'm not the best person to make this kind of description but i will try.
I Have a Subbu, an 24/96 AKM4396 and this one, i call it The Indian 🙂
Is a very balaced dac, maybe neutral is a good word but a bit of tonality can be adjusted by opamps used. I installed sockets and i'm rolling them from time to time.
The most important thing is when using Arduino you have acces to sevelar filters settings and you can alter further the sound.
If i worked and invested in finishing you can imagine i like it 🙂 but i also like this one and a friend of mine will give me to test it more: AK4490 - I2S over USB Audio
There is no perfect dac and from time to time change them in my system. I have also some 3-4 amps to change from time to time 🙂
 
#326
Is anyone able to give me some hints about grounding ? I have some parts of the DAc wich are completely isolated from the others and i dont know how to proceed. For example the USB>I2S interface has an isolator and USb side is completely isolated from DAC side. Also the Arduino part is completely isolated from DAC.
Also when i am electrostatically charged and touch the DCA case the display goes crazy and also Arduino.
If needed i will draw a diagram for easier understanding.
 
#327
atupi said:
Is anyone able to give me some hints about grounding ? I have some parts of the DAc wich are completely isolated from the others and i dont know how to proceed. For example the USB>I2S interface has an isolator and USb side is completely isolated from DAC side. Also the Arduino part is completely isolated from DAC.
Also when i am electrostatically charged and touch the DCA case the display goes crazy and also Arduino.
If needed i will draw a diagram for easier understanding.
Click to expand...

Hi,
I don't have the electrostatic issue but my worked until I one day the last opamp starting to heat up and output are highly distorted ( I am only using single ended output). Something is oscillating after working for few days and I also ran out of idea. Now I am kind of leaving it alone for the time being and will get back to it when I have the mood.

P.S. The arduino ground is very sensitive to where I connecting LCD display ground, the rotary and the power ground.
 
#329
attach is my dac with help from the original designer.
 

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