Hifimediy ES9023+TE7022 24/96 USB Dac - Page 19 - diyAudio
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Old 12th January 2013, 10:24 AM   #181
alkasar is offline alkasar  France
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thank you. I did'nt know your isolator board required 8vdc. Probably a 7805 there.
LT1963 is LDO. It works with as low as 340mV drop , and even less for low current
According to datasheet, ADUM4160 only needs 8mA. not much!

With the excellent onboard LT1763 reg, a very good pre-reg is not needed. A simple 7805 would do.
If better specs are needed, look for a regulator with best ripple rejection at low freq. LT1963 is not cheap and optimized for fast transient response which is not required in it's pre-reg role here. It's too good for the job. If you want to pay that price, go for LT1086 instead.

I'll build a simple pre-reg for UAE23+. Depending on how easy it is to short onboard rectifier, either provide 6Vdc to the board terminal or short the rectifier and provide 5Vdc directly to LT1763.
Don't know yet which regulator I will use as pre-reg.
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Old 12th January 2013, 11:16 AM   #182
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The onboard regulator for the isolator board comprise of one tl431 some bc548 and one d44h11. I think the tl431 provide reference voltage while d44h11 is the pass transistor.
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Old 12th January 2013, 12:48 PM   #183
alkasar is offline alkasar  France
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Quote:
Originally Posted by quantran View Post
The onboard regulator for the isolator board comprise of one tl431 some bc548 and one d44h11. I think the tl431 provide reference voltage while d44h11 is the pass transistor.
so it's a shunt regulator. It is more than I expected for such a board. Excellent
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Old 12th January 2013, 01:46 PM   #184
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Default Hifimediy ES9023 dac works with MK808 android PC!!!!!!

Out of curiosity I just plugged the dac into my MK808 running Finless 1.5a firmware - the dac was immediately recognised and sounds great with 16/44.1 material.

MK808 Dual Core Android 4.1 Jelly Bean TV BOX RK3066 Cortex-A9 Mini PC Stick Support Skype Live Chat - GeekBuying.com

MK808 Android mini TV Player - Finless 1.5A Custom ROM

I'm running XBMC media player for android and have a ton of music stored on a NAS, so all in all I have a great wireless music server with ES9023 dac that cost me about 80!!!!!!!

There is some slight background noise (not audible during playback) but I haven't yet optimised the system PSUs nor tried the ADUM4160 shunt reg board.
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Old 12th January 2013, 01:47 PM   #185
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USB hub required....
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Old 12th January 2013, 01:48 PM   #186
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Android settings....
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Old 13th January 2013, 04:25 AM   #187
tofurky is offline tofurky  United States
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Thumbs up adum4160 results

tonight i attempted (and succeeded!) putting together my first smd kit, the circuits@home adum4160
this improved the results from stock by a significant amount, -7.8dB noise (also using ferrite + linear/lt1763 5v)
my results aren't very precise due to the quality of my equipment, but they are probably ballpark figures.
attached are some pics of the results and of the test setup.
-matt
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Old 14th January 2013, 03:04 PM   #188
gychang is offline gychang  United States
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Quote:
Originally Posted by Cornelis Spronk View Post
I am using Ubuntu 12.04.

Sound is clear and natural.

The HiFimeDIY DAC is substantially better than UCA202 in my previous setup.

The small package, the excellent sound directly into the headphone, makes this DAC an absolute convenience.

thanks for your input, I use linux and helpful to see a positive comment.

gychang
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Old 16th January 2013, 03:00 PM   #189
diyskat is offline diyskat  Australia
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Originally Posted by diyskat View Post
Answering my own question - Found out that in the ebay listing for the UAE23 they did provide links to the recommended TeraLink-X2 drivers.
So I've had this recommended TeraLink-X2 driver on my Win7 64bit laptop for a few days and it seems unstable. After some time it starts producing heavy audio distortion and messes up playback (e.g. video playback starts skipping). Then it usually starts hogging the CPU at almost 100% and the computer has to be rebooted.

Has anyone experienced a similar problem?

I don't recall having these issues with the default Windows driver. So I've now uninstalled the TeraLink-X2 driver and reverted to the default Windows driver with no ASIO support.
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Old 16th January 2013, 07:02 PM   #190
manu54 is offline manu54  France
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hello everyone

I received the good dac hiifimediy yesterday and I'm pretty enerve, let me explain.

j jriver uses version 18, with a laptop and connected to the pc and dac and my dock jbl on beat extrem (on the entry in line 15 kohms).
J have downloaded the driver hifimediy 64 bit.
j have configured WASAPI event style on jriver.

result, I have small sizzling as little noise when I put the strongest on the dock, as it becomes saturated, I have the impression also that I can not put too much on his jriver, j stops at 80%, as this increases the crackling.

I put the buffer from 100 to 250 ms to see but nothing change.

The sound in this context is not genial, generally at moderate volume I find it a bit too round and too much sharp in the same time, it is strange.

. I precise that I already dac in the poppulse super pro 707 and tubemagic maverick d1.

if someone could help me understand what is happening

Do you think the 15 kohm input of the line in (jack) of tjbl dock disturbs the dac.
Or it is a problem jriver configuration, or driver hifimediy

thank you in advance

Last edited by manu54; 16th January 2013 at 07:09 PM.
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