DAC-END R (ES9018) full assembled board

audiodesign · 2013-12-05 7:25 am

quanghao said:
I open GR for PCB LL1684 in this :
Interest list for LL1684 PCB SET (2 channels):

1. NicMac, 1 set (possibly also the transformers)
2. palmito, 1 set
3. Misterwolf, 1 set
4. rredline, 1 set
5. audiodesign, 1 set
......

In about 15 days to complete PCB!

Thanks for your interest!

http://www.diyaudio.com/forums/quanghao-audio-design/246579-super-v-i-converted-ll1684.html

thank all!
quanghao

1. NicMac, 1 set (possibly also the transformers)
2. palmito, 1 set
3. Misterwolf, 1 set
4. rredline, 1 set
5. audiodesign, 1 set
6. Claudio M. 1 set

Erlend Sæterdal · 2013-12-05 7:41 am

audiodesign said:
The price of the new modules are in the new group buy

http://www.diyaudio.com/forums/quan...-es9018-full-assembled-board-version-2-a.html

gjorgji · 2013-12-12 6:55 pm

audiodesign said:
After receiving the final version of DAC modules we have detected a very little oscillations on shunt regulators in high frequency range (about 150KHz).

Measurements and simulations made with the collaboration of CAAD allowed to find a simple solution to this problem.

To make this modifications are not necessarily required SMD components but if you want to use SMD and you have problems to find these components you can ask to Quang Hào.

1) Remove R9 on op-amp modules (as suggested before)
2) Remove R10 on op-amp modules (as suggested before)

The following modification must only be made only on +1.2V , +3,3V and +15V shunt regulators.

3) Add 100n X7R as described on attached pic -->All are X7R (better dialectric compared to U5r , Z5R etc)
4) Add 1uF X7R as described on attached pic -->All are X7R (better dialectric compared to U5r , Z5R etc)

These modifications also will reduce the temperature on the shunt of the op-amp module.

The modification as been applied on the last DAC modules sent.

See the image created by CAAD.

Hi Andrea,

Will you know the mouser/digikey part# for those caps(X7R) ? I am ordering the LMV7219 so will like to get the caps also.

Thanks,
Gjorgji

Erlend Sæterdal · 2014-01-01 3:49 pm

Using BuffaloIII for Opamp I/V

Have aprox 30 mvdc out using 27 ohm I/V resistors. Anything to do about that ? I think I will try 18 pf silver Mica after each 470 ohm resistors ( R2 , R 3)

Erlend Sæterdal · 2014-01-01 5:00 pm

18 pf did not help at all.

juju35135 · 2014-01-18 1:56 am

The spdif issue

Hello All,

I recieve my dac few days ago
starting to lisntenig it...
but some "glitch" and LOCK problems :

I have 2 cables : 1 metter standard grade
5 m hq grade

- with the 1m random glitch/lock desepear (depends use of computer, even plug/unplug soldering iron)
- wtih the 5m same "glitch" and lost of signal for 1s (the 2 leds light off for 1/2s)

I look the posts ;
So , I had put the 100nf cap
=> its solved my "lost of signal" => it's work like the 1m
I have always the glitch/lock, more frequent at >44khz

So I need to change the LMV7219 ??! :faint:

Thanks for advice
julien

quanghao · 2014-01-18 5:30 am

Hi!
you dac not need mode all, I was fix all!

220V voltage need to be connected to the earth, see photos
thanks

kmajjo · 2014-02-14 2:04 pm

First version DAC board

Hello all,
If somebody have a first version DAC board (no power and output needed) to sell , please contact me.
Br
Jacky

judo · 2014-02-22 10:59 pm

rredline said:
I use this PIC programmer to upgrade the firmware, cheaper than Pick-It.
Search in eBay or Aliexpress for "K150 PICPRO", it costs about $12.67.
It is made by BAITE and uses FTDI USB-Serial chip.

A side note, on my system, after the programming status bar reach 100%, somehow it pauses for about 8 minutes before the "Successful" prompt appeared, it works though, so be patience if this occurred.

I have uploaded the driver, programming software and a simple tutorial here:
BAITE K150 PICPRO Programmer Drv & SW.zip

Thank you for the tip and the tutorial, it was very useful.

michyy · 2014-04-10 7:41 am

Hey. So hooked to 220 -
http://www.diyaudio.com/forums/quan...018-full-assembled-board-151.html#post3609445.

Voltage on white and yellow = 36v
on blue and green = 6v .
Is it possible to connect white and yellow on plate 18v ???
Thank you !

quanghao · 2014-04-10 10:08 am

LL1684 PCB and DAC v2

I had the LL1684 and the PCB, the address you sent me, so I send them to you!
Please see image

Our warmest thanks

quanghao · 2014-04-10 10:11 am

I had the LL11684 and the PCB, the address you sent me, so I send them to you!
Please see image

Our warmest thanks

michyy · 2014-04-10 11:47 am

Hello quanghao , I'm hooked. put together, but I will not turn on display.
Display may be not asking what firmware ?
Or you upgrade firmware them all before sending ?

quanghao · 2014-04-10 11:51 am

michyy said:
Hello quanghao , I'm hooked. put together, but I will not turn on display.
Display may be not asking what firmware ?
Or you upgrade firmware them all before sending ?

please use new!
thanks

michyy · 2014-04-11 11:50 am

michyy · 2014-04-11 2:02 pm

quanghao · 2014-04-11 2:29 pm

michyy said:
foto

please sent back to me the LCD module, i can hep you all!

or i sent to you new!
thanks

michyy · 2014-04-11 2:44 pm

ok . All is excellent on the photo ?
If everything is correct , write address where should send by the module lcd with microchip .

michyy · 2014-04-12 11:07 am

Hello quanghao . This module fault with pic and lcd, or it
can be the fault of the DAC. How can I
check the serviceability of the DAC, wihout module
pic and LCD?

quanghao · 2014-04-12 11:58 am

michyy said:
Hello quanghao . This module fault with pic and lcd, or it
can be the fault of the DAC. How can I
check the serviceability of the DAC, wihout module
pic and LCD?

the lcd have problem!
thanks

DAC-END R (ES9018) full assembled board

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