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Old 9th August 2017, 01:11 AM   #251
res07njc is offline res07njc  United States
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Join Date: May 2005
Location: Tampa Fla
I would imagine that it does. Honestly, it's the only DAC I've ever built but I'm still not left wanting to search for better. There's plenty of other weak links to toy with here. Perhaps a SE Vout DAC for another system if anything. I did see your build btw and thought that it was creative. The open frame approach looks very serviceable. My chassis ending up being about .3degC/w if anyone's curious.
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Old 11th August 2017, 11:59 AM   #252
LaxAnErde is offline LaxAnErde  Germany
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My DAC projects, the big one is PCM1794 based with separate power supplies for the Raspberry, DAC and analog stage.
The small one is a HAT für the Raspberry. More details here:
DIAL-DAC - DIAL audio - DIY
Both DACs running MoodePlayer with Raspberry 2/3.
Attached Images
File Type: jpg PlayerMini1.jpg (221.6 KB, 2051 views)
File Type: jpg DSC_5839_DxO.jpg (565.3 KB, 2029 views)
File Type: jpg DSC_5841_DxO.jpg (550.9 KB, 1941 views)
File Type: jpg DSC_5855_DxO.jpg (167.1 KB, 1823 views)
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Old 25th August 2017, 10:38 PM   #253
miro1360 is offline miro1360  Europe
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Default easyDAC

I like DACs powered directly from USB in small case/design.

This my toy is:
- NOS R-2R AD1862 DAC
- line-out direct from I/V
- headphone out based on TPA6120A2 with potentiometer, easily drives all headphones with a lot of power
- no additional filters (only RC) and no caps in series with signal line
- switch between line or headphones (no need unplug something when I choose between headphones or amp), with relays
- for USB/I2S conversion is used PCM2706 (on board are also pins for another I2S), simplicity, no additional drivers, I like Plug&Play and I am listening mostly in 16bits
- power from usb is converted with isolated DC-DC DCP0205xx, regulated to +-5V for digital and AD1862 digital, +-12V for AD1862 analog and I/V, +-5V for TPA6120A2
- it can handle custom I/V boards in small design, +-12V
- 4 layers board

Attached Images
File Type: jpg easyDAC_AD1862.jpg (97.1 KB, 1792 views)
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File Type: jpg image005.jpg (279.1 KB, 468 views)
File Type: jpg EasyDACbrd01.jpg (142.8 KB, 622 views)
File Type: jpg EasyDACbrdPartsTop_.jpg (347.8 KB, 553 views)
File Type: jpg EasyDACbrdPartsBottomFlip.jpg (144.7 KB, 385 views)

Last edited by miro1360; 25th August 2017 at 10:55 PM.
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Old 28th August 2017, 03:41 AM   #254
phongnavy is offline phongnavy  Viet Nam
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Hi Miro1360,
Your DAC is great, sounds good? I also want to make a DAC AD-1862!
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Old 28th August 2017, 04:28 AM   #255
miro1360 is offline miro1360  Europe
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Quote:
Originally Posted by phongnavy View Post
Hi Miro1360,
Your DAC is great, sounds good? I also want to make a DAC AD-1862!
thank you ... definitely, AD1862 are just perfect, so much details, there is no delta-sigma which can beat AD1862, maybe sometimes in future something from ESS, but not yet .... from R-2R it can be beaten by PCM1704, but they prices are now galactical and fast impossible to find something new ...
do you want build mine configuration or you want own design?
if you decide for my design as is, I can send you PCB for free with all instructions (a lot of parts are SMD, it means you need some soldering skill for SMDs) ... why free - because I left with few PCBs from my build and I am not for commercial here, only what I want back is your honest opinion about sound after your build, because some people forget on this, it is sometimes hard to find honesty ...

if you want own, here are my small hints:
- avoid all digital filters
- if you like power supply from socket, go with small toroid and LM317/337, separate digital and analog, be sure you end up with good ground design ...
- for usb/i2s try jlboard - it is xmos based and it have direct configuration for AD1862 (you dont need additional logic for pcm) ... if you want standard I2S you need additional PCM logic - take it from pavouk.org site from PCM1702 (both are 20bit)
- for I/V, start with active I/V without additional filters, maybe only RC (really, avoid opamp filters), here active I/V .... for I/V you can try LME49990 or others, here are many opamps with good sound result ...

Last edited by miro1360; 28th August 2017 at 04:36 AM.
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Old 28th August 2017, 12:28 PM   #256
phongnavy is offline phongnavy  Viet Nam
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Hi Miro,
Thank you, i want to build own with Spdif input, USB and Optical. If you can send me your schematic, of course I am not for commercial use but for my own use. After the success I will evaluate the sound quality and feedback let you know. I also have the design for DAC chip PCM63, it is also a chip quality equal to AD1862. If you want I will send the schematic file (Orcad) for your reference.
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Old 28th August 2017, 02:35 PM   #257
miro1360 is offline miro1360  Europe
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I sent you my schematic via PM.
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Old 29th August 2017, 01:09 AM   #258
phongnavy is offline phongnavy  Viet Nam
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Thank you very much for the schematic, i will try and give you feedback on the implementation steps as well as sound quality.
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Old 24th September 2017, 08:52 PM   #259
surfstu is offline surfstu  United Kingdom
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Location: London
@laxanerde

Nice looking moode players! Can you explain why you have extra wiring to the Pi? I can see the 5v supply but also some extra wires (yellow and orange)

Also, where did you get your psu pcb,s? Did u make these?

Stu
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Old 25th September 2017, 06:21 AM   #260
LaxAnErde is offline LaxAnErde  Germany
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Hi Stu,
thanks. The extra wires are for the power switch. I have implemented an additional circuit for save switch off the Pi.
The blue pcbs are selfmade.
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