Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

DAC gallery
DAC gallery
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 28th March 2019, 06:45 PM   #321
Thorp is offline Thorp
diyAudio Member
Join Date: Jan 2013
This is my newest project, but it is the first who get a housing.
It is almost finished. I only have to polish the front plate and to make some measurements for the THD compensation coefficients: I hope to find a function between THD coeffs. and the digital volume values.
It is an USB DAC based on XMOS XUF208 and 2 x ES9018K2M.
- The oscillator is adjustable SI549 and it feeds the clock for DAC chips, but also MCLK for XMOS via 3.1 (3 x I2S lines out from XMOS and 1 x MCLK line in to XMOS) 150MHz isolator, so the DAC works in synchronous mode.
- There are two INDEL transformers 2X15vac 20VA plus 2x8vac coils each (I carefully made them by hand ). They are followed by 8 x LM317 pre-regulators, so all low noise (LT3042/45, ADM7150) LDOs get the right (minimum) input voltage in order to keep their temperature as low as possible.
- The main controller is based on STM32F103 "blue-pill" - inspired by Dimitris project : www.dimdim.gr It is also isolated via 2 x I2C isolators: one for XMOS and the other for the DAC chips.

You can watch a short video here: YouTube
Attached Images
File Type: jpg es0.jpg (300.0 KB, 626 views)
File Type: jpg es1.jpg (384.0 KB, 615 views)
File Type: jpg es2.jpg (686.7 KB, 593 views)
File Type: jpg es3.jpg (643.7 KB, 569 views)
File Type: jpg es4.jpg (602.8 KB, 560 views)
File Type: jpg es5.jpg (706.9 KB, 354 views)
  Reply With Quote
Old 29th March 2019, 08:19 AM   #322
Dimdim is offline Dimdim  Greece
diyAudio Member
Join Date: Sep 2008
Location: Athens
This is a very proper looking build! As custom as it gets!

I love it when I see my designs inspiring fellow DIYers to build their own projects, some of which look considerably better than my own.
  Reply With Quote
Old 6th April 2019, 07:11 PM   #323
Bas Horneman is offline Bas Horneman  Netherlands
diyAudio Moderator Emeritus
Bas Horneman's Avatar
Join Date: Apr 2002
Location: The Netherlands
Default RAKK DAC MK2

Attached Images
File Type: jpg IMG_20190406_160035.jpg (126.9 KB, 246 views)
File Type: jpg IMG_20190406_160152.jpg (155.0 KB, 116 views)
If you can see the speaker cone move...it's not hifi.
  Reply With Quote
Old 14th June 2019, 07:31 PM   #324
Thorp is offline Thorp
diyAudio Member
Join Date: Jan 2013
Using pictures stored in the flash memory chip gives better looking results than using text .h files. It is a little more work to be done (precise crop) for the text and background synchronization, but the effort deserves.
Attached Images
File Type: jpg IMG_20190614_220338.jpg (351.5 KB, 99 views)
File Type: jpg IMG_20190614_220420.jpg (491.8 KB, 97 views)
  Reply With Quote
Old 13th July 2019, 07:48 PM   #325
Gregje is offline Gregje  United Kingdom
diyAudio Member
Join Date: Oct 2009
Location: London
This is my Rpi with Allo Boss DAC and double linear PS with LM350s.
Attached Images
File Type: jpg _dsc8461s.jpg (208.5 KB, 77 views)
File Type: jpg _dsc8361s.jpg (322.7 KB, 108 views)
  Reply With Quote


DAC galleryHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
diyclub.biz DAC-38, DAC-60, DAC-68. Anybody heard? TonyDasilva Digital Line Level 21 13th April 2009 05:10 PM

New To Site? Need Help?

All times are GMT. The time now is 11:23 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio