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.

ES9038Q2M Board
ES9038Q2M Board
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
Reply
 
Thread Tools Search this Thread
Old 17th September 2019, 02:37 AM   #5022
Markw4 is online now Markw4  United States
diyAudio Member
 
Join Date: Jul 2016
Location: California
Quote:
Originally Posted by 888777 View Post
...Lusya AK4137...
Okay that link worked. Maybe you can ask a moderator to delete those last two or three posts without a working link.

Already have a board of that version here. They made things a little more compact, including the display and button which are now on the board rather than on a smaller board at the end of a ribbon cable. It is about the same as the old board in most other respects.

Bottom line, that one should be okay.
  Reply With Quote
Old 17th September 2019, 03:44 AM   #5023
888777 is offline 888777  Russian Federation
diyAudio Member
 
Join Date: Jul 2017
Location: Primorskyi kray
display and sensor for the remote control is not difficult to bring) for me, or rather, for my wife it is important that there is spdif, she also liked es9038). what settings to set in ak4137?
  Reply With Quote
Old 17th September 2019, 04:39 AM   #5024
Markw4 is online now Markw4  United States
diyAudio Member
 
Join Date: Jul 2016
Location: California
Quote:
Originally Posted by 888777 View Post
...what settings to set in ak4137?
Instructions should be just like the ones for the old version which is at the bottom of the ad at: AK4137 Raspberry Pi IIS декодер DAC доска SRC аудио Поддержка I2S 32bit 384 K DSD256 DSD I2S IIS преобразования с ЖК дисплей Дисплей-in Усилитель from Бытовая электроника on Aliexpress.com | Alibaba Group

It expects a USB board with a connector having two rows of pins in order for it to read all the configuration information for input sample rate, DSD_ON, and Mute. We could probably figure out how to patch in a USB board that has those signals, but in a different pin layout format. However, some USB boards don't have all the necessary signals in which case you would have to configure the input for manually for each type of file being played.

Last edited by Markw4; 17th September 2019 at 04:45 AM.
  Reply With Quote
Old 17th September 2019, 06:37 AM   #5025
Zbunjen is offline Zbunjen  Croatia
diyAudio Member
 
Join Date: Sep 2019
Quote:
Originally Posted by Markw4 View Post
Generic should work okay.
I've found a local supplier of parts. Looks like they have some opamps (there is a NE5532 on the previous page too), caps are Jamicon, resistors ill take 1% tolerance

Quote:
Also, each existing AVCC pin supply includes an electrolytic cap, an SMD ceramic cap, and an SMD inductor. The two caps are in parallel going to ground, and the SMD inductor connects AVCC to the existing 3.3v rail. If using opamp AVCC supplies, first remove the inductor or cut the trace to disconnect the existing 3.3v. The caps might be able to stay if the electrolytic is the right value, or you could replace it with a better one if you want. The ceramic cap can stay or go. I usually leave it.
Got it! Judging by the traces from the 3.3v rail, those are these 2

Quote:
Vref goes to the standard 3-opamp output stage, if one is fitted. Otherwise, it serves no purpose.
So, i just simply dont connect Vref to anything? Ill just leave those connections open in case of an I/V output stage in the future.

Quote:
Regarding your linked picture, if buying a pre-built LT304x module, it probably already has an output cap so no need to duplicate that (i.e. you can delete that first cap on the left in your drawing).
So the diagram is correct i presume, i didnt expect that.
Now to just wait for some things to arrive...
  Reply With Quote
Old 17th September 2019, 10:26 AM   #5026
888777 is offline 888777  Russian Federation
diyAudio Member
 
Join Date: Jul 2017
Location: Primorskyi kray
I connected ak4137 ... what can I say? cool) I haven’t done the power on the DAC yet. just changed the clock to crystec cchd. I will collect Nazar, then I will remake AVCC. I'm using lm317 / lm337 now. then I’ll deal with output and registers.
  Reply With Quote
Old 17th September 2019, 10:30 AM   #5027
888777 is offline 888777  Russian Federation
diyAudio Member
 
Join Date: Jul 2017
Location: Primorskyi kray
question. is it possible to connect lm317 without a stabilizer in the circuit instead of asm1117 3.3? adjustment is made using a variable trimmer. lm317 can give a voltage of 3.3 V, I checked it.
  Reply With Quote
Old 17th September 2019, 11:49 AM   #5028
Zbunjen is offline Zbunjen  Croatia
diyAudio Member
 
Join Date: Sep 2019
Quote:
Originally Posted by 888777 View Post
question. is it possible to connect lm317 without a stabilizer in the circuit instead of asm1117 3.3? adjustment is made using a variable trimmer. lm317 can give a voltage of 3.3 V, I checked it.
Some people have done it, LDO's are fine for digital power afaik
LT3042 is lower noise
  Reply With Quote
Old 17th September 2019, 01:34 PM   #5029
888777 is offline 888777  Russian Federation
diyAudio Member
 
Join Date: Jul 2017
Location: Primorskyi kray
It was in this connection that the DAC failed. lm317 for avcc. tps7a4700 each separately for watches and other parts. I was told above that the wound regulators could provoke a failure.
  Reply With Quote
Old 17th September 2019, 01:37 PM   #5030
888777 is offline 888777  Russian Federation
diyAudio Member
 
Join Date: Jul 2017
Location: Primorskyi kray
It bothers me that lm317 without a stabilization transistor may jump the voltage. and instead of 3.3 it may at some point become 3.5 which is already critical for avcc.
  Reply With Quote

Reply


ES9038Q2M BoardHide 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
My Cambridge 500SE, needs an output board (to replace internal DAC Board) slbender Digital Source 1 11th July 2018 02:43 AM
JLSounds XMOS USB board + AK4396 board + Direct DSD PCB ravid Swap Meet 1 29th December 2016 11:36 AM
Unknown Board DC12V TPA3116 amplifier board DIY L163-9 AUS Ben Class D 0 8th December 2016 04:05 AM
FS: Ian FIFO i2s-to-PCM board, Single XO clock board trung224 Swap Meet 3 26th November 2016 02:18 PM
Lost 1 Zv4 ckt board..looking to buy 1 circuit board Blues Pass Labs 1 22nd March 2004 10:09 PM


New To Site? Need Help?

All times are GMT. The time now is 11:15 PM.


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
Wiki