Issue with DIYIHNK's USB - I2S XMOS bridge - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

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

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 2nd August 2014, 07:25 PM   #1
diyAudio Member
 
Join Date: Mar 2014
Location: The Alps
Default Issue with DIYIHNK's USB - I2S XMOS bridge

I recently purchased one of DIYINHKs usb - I2s bridges in order to start a project to build a wireless player (UDOO -> USB bridge -> ES9023 -> amp -> speaker).

I prepared a testing setup with a LM1117T LDO voltage regulator supplied by a SMP (5V DC -> 3.3V DC) to supply the PCB with the required 2x 3.3v as described on their folks homepage. XMOS DSD DXD 384kHz high-quality USB to I2S/DSD PCB - DIYINHK

Nothing happens when I connect the setup to my mac (OS X 10.7.5). I double checked all connections / voltages etc. I could not get a usable answer on DIYINHKs "support". Does anyone have the same problem? Do I need to configure my mac?
  Reply With Quote
Old 11th August 2014, 02:35 PM   #2
zxx222 is offline zxx222  Europe
diyAudio Member
 
Join Date: Aug 2005
Location: b
I think there is enough one +3.3V and gnd connection to power the board. I have got different board - with isolation and still did not power it to check if it works, but isolated side is powered exactly as in your board, so when I will have time, I will try to power it up and check if it works.
I want to use external 5V power instead USB for dirty side, but in user guide there is no info about that and I am not that experienced to understand xmos chip datasheet to figure it out myself.
  Reply With Quote
Old 12th August 2014, 01:45 PM   #3
diyAudio Member
 
Join Date: Mar 2014
Location: The Alps
thanks, zxx222: it appears that there are a couple of power connectors. The website says to power the device through two pins right above the I2S connector with +3.3V which I did.
There is an additional two-pin connector close to the USB which probably can also be used but I am not sure what voltage should go in (I suspect also +3.3V).
  Reply With Quote
Old 12th August 2014, 07:13 PM   #4
zxx222 is offline zxx222  Europe
diyAudio Member
 
Join Date: Aug 2005
Location: b
Can you post a photo of your connection?
  Reply With Quote
Old 17th August 2014, 07:54 PM   #5
diyAudio Member
 
Join Date: Mar 2014
Location: The Alps
Default Prototype setup

This is my prototype setup (I am planning to establish a dedicated power supply lateron) using a bread board (in classical white as can be seen from photos). Attached to it I have a switch mode power supply with ca 5.1V DC out and max 2 Amp. You can see the red and black leads going into the breadboards power rail.

From the rail, I supply the 5 V directly to the DAC boars (see DSC00128.jpeg in front. When I connect I can hear a soft "pop" indicating that the board must be powered on.

Then I have a LM1117 voltage regulator (ca max 800 mA or so) that supplies exactly +3.3V from the rail on the breadboard. I have connected the output of the VR to the USB - I2S bridge as shown in DSC00129.jpg. Ground goes through the DAC back into the breadboard.

What could be wrong here?
Attached Images
File Type: jpg DSC00128.jpg (808.3 KB, 50 views)
File Type: jpg DSC00129.jpg (811.4 KB, 45 views)
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
XMOS-based Asynchronous USB to I2S interface Lorien Digital Source 2148 Yesterday 11:46 PM
Which USB to I2S XMOS interface? andyjevans Digital Line Level 7 17th October 2013 08:51 PM
Ultimate Open Source XMOS USB-I2S: The source to end all sources. krfkeith Digital Source 4 14th June 2013 03:54 PM
USB to I2S: M2Tech vs XMOS vs Open-source Qnktc audiodesign Digital Source 55 20th December 2012 06:27 AM


New To Site? Need Help?

All times are GMT. The time now is 03:09 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2