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 Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Another DAC + Headphone amp
Another DAC + Headphone amp
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 3rd September 2007, 03:14 AM   #11
ghetto is offline ghetto  United States
diyAudio Member
 
Join Date: Jul 2003
Location: Oklahoma
There were lots of errors with the original schematic.
- Left and right channels were switched at headphone jack.
- Mute on PGA2310 was not connected to a pin on the micro.
- Chip select not connected to a pin on the micro.
- Others that escape me now.

There have been some other changes:
- Reset supervisor to prevent power-on glitches.
- Relay to suppress TPA6120 power-on thumps.
- Bicolor LED (lock / no lock indicator?) Good for debugging.
- 36Khz IR receiver added.
- Alps encoder with switch added. Switch function not chosen yet.
- Ditched LT1963 for +/-12V (DD5 package = huge), kept for +5V. Probably no audible difference anyway.

I think that covers the changes. The PCB is getting closer. Some packages need tweaking, some traces need rerouting... I bet you will find a few things you don't like.
Attached Images
File Type: gif pcb-sneak.gif (94.2 KB, 830 views)
  Reply With Quote
Old 5th September 2007, 12:53 PM   #12
gmarsh is offline gmarsh  Canada
diyAudio Member
 
gmarsh's Avatar
 
Join Date: Apr 2004
Location: Halifax, NS
You can get the WM8816 from Newark.com in single quantities.
  Reply With Quote
Old 8th October 2007, 07:47 AM   #13
Antonytls is offline Antonytls  France
diyAudio Member
 
Join Date: Mar 2004
Location: Toulouse
WM8816 is no longer available on Farnell and Newark...
  Reply With Quote
Old 8th October 2007, 06:01 PM   #14
ghetto is offline ghetto  United States
diyAudio Member
 
Join Date: Jul 2003
Location: Oklahoma
Hi guys. Sorry for the lack of updates. I had knee surgery about 3 weeks ago and I just haven't had the motivation to continue work on the project yet. I will get back to it though!
  Reply With Quote
Old 10th July 2008, 04:02 PM   #15
DVBjunky is offline DVBjunky  Germany
diyAudio Member
 
Join Date: Dec 2006
WM8816 is discontinued......MAS9116 also....the new MAS DA6116 is not easy to find. Can anyone help with a source?
  Reply With Quote

Reply


Another DAC + Headphone ampHide 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
Using a headphone amp as a pre-amp? Basalt Solid State 4 19th November 2007 09:55 AM
ESL Headphone X-former bjackson Planars & Exotics 5 19th September 2005 03:45 AM
Headphone amp audioPT Headphone Systems 3 20th September 2004 10:17 PM
Zen v4 headphone amp Rob M Headphone Systems 11 21st May 2003 12:58 AM
sym. Headphone amp Orgonom Headphone Systems 7 15th March 2003 07:28 PM


New To Site? Need Help?

All times are GMT. The time now is 11:50 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki