DIY NOS R-2R DAC for Raspberry Pi

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DIY NOS R-2R DAC for Raspberry Pi

Postby bigbulb » Wed Nov 13 2019 03:39

Hi all,

Just wish to share my DIY AD1865 DAC project.
Been trying hard to make a discrete R-2R DAC on a pi's hat , but can't squeeze those parts into that small board and ended up with obsolete AD1865 chip.

Image

Here's more info about the DAC :

http://audiophilediyer.com/diy-nos-ad1865-dac-for-raspberry-pi/


https://youtu.be/QWDK1UkRcf0
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DIY NOS R-2R DAC for Raspberry Pi

Postby ovs-audio » Fri Dec 13 2019 15:41

Hi, very very nice, i cant wait to have one !
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DIY NOS R-2R DAC for Raspberry Pi

Postby chrisrm9208 » Fri Jan 03 2020 13:03

@Michelangelo, what would it take to support this DAC within Volumio?

Thanks,

Chris M
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DIY NOS R-2R DAC for Raspberry Pi

Postby chrisrm9208 » Sat Jan 04 2020 16:58

Well, thanks to the builder's research, it turns out that the RPi-DAC setting works well with this, although he did say that this *has* to be set on the initial installation, else Volumio GUI shows that the DAC is changed but doesn't change the driver. I shall run the thing in and see how it goes but it sounds good already...
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DIY NOS R-2R DAC for Raspberry Pi

Postby chrisrm9208 » Sun Jan 05 2020 13:46

Hmm, after running overnight, the veils are lifting. It now provides 3-4dB more output and is getting clearer... Onward!
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DIY NOS R-2R DAC for Raspberry Pi

Postby stellarelephant » Fri Mar 06 2020 00:28

Hi Chris,

Can you share your full impressions of this DAC's sound quality after using it for a couple months?

To my knowledge, there is only one other multibit RPi DAC hat out there, and its the one I use in my system now. I'm talking about Matt Garman's TDA1387 hat. I have tried several DAC hats in my setup, including Boss, Piano, PecanPi, DIAL, and the Audiophonics TDA1387, plus a couple DIY prototypes. The Garman DAC is my favorite of all.
https://www.diyaudio.com/forums/digital-line-level/313395-tda1387-dac-pcb-front.html

Anyway, I seem to much prefer the NOS sound. I have never heard an AD1865 DAC, but these chips seem to have been used in some top-tier commercial gear in their heyday. This new DAC hat definitely has my attention! I look forward to hearing more about your experience with it.
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