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Old 2nd August 2009, 07:12 PM   #51
EUVL is offline EUVL  Europe
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> http://www.qlshifi.com/en/wzcapi/qa550.htm
> oh it's great! almost what I want is here.

We bought 2. Will report whether it is any good.
Are planning to put an AK4396 next to it.

> so, you want "can be portable and also full sized ready"?

You want portable, I want fill size.

> http://www.diykits.com.hk/OPA.htm

No. A modifed version of the Hagclock / Kwakclock7.

http://www.hagtech.com/hagclock.html

> I added rmt_clk input pad, around clocks.
> 3.4. remote button pad on the bottom
> 5. VFD for front display?
> 16 pads on the top has D0-3, RS, E, R/W signals.

Great service.

> 6. If you extend and give dedicated power to LCD, SD, button, clk, and omit these parts on the board.... there will be only PIC and 3.3V regulator for PIC, and some 0.1uF on main board

Plus the SD socket, and lots of connectors.




Thx,
Patrick
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Old 2nd August 2009, 08:47 PM   #52
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yes I want portable, 0.5 inch thin.

>Plus the SD socket, and lots of connectors.

SD is also extendable, you need to place SD slot at front panel.
I'm thinking to use this SD breakout.
http://www.sparkfun.com/commerce/pro...roducts_id=204

It can be placed on the board or extended to front panel,
Or you can use other SD slot. anyway SD connection is also 65/35 100mil pads.
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Old 3rd August 2009, 04:16 PM   #53
EUVL is offline EUVL  Europe
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Why not use this :

http://search.digikey.com/scripts/Dk...ame=HR845CT-ND

Much cheaper.


Patrick
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Old 20th August 2009, 09:42 AM   #54
Tolu is offline Tolu  Germany
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Hi Patrick

did you get the QA-550 already?

What is the max. size of SD-cards you can use with it?

What shows the display?
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Old 20th August 2009, 09:52 AM   #55
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Quote:
Originally Posted by Tolu View Post
What is the max. size of SD-cards you can use with it?
The website states:
Quote:
It can support FAT16/FAT32 Sandisk SD/SDHC1G-8G
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Best regards: Holger
www.holgerbarske.com - Deutschsprachiges Paradise-Support-Forum
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Old 20th August 2009, 10:24 AM   #56
jonners is offline jonners  United Kingdom
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Quote:
Originally Posted by Tolu View Post
Hi Patrick

did you get the QA-550 already?

What is the max. size of SD-cards you can use with it?

What shows the display?
Hi Tolu
I too am interested to hear what Patrick thinks of the QA-550.
I bought one myself recently. I had it up and running easily and quickly using the maximum size 8GB card.
The display shows track no. and total no. of tracks (max 200) and the first four letters of the track title. With the remote you can select a track by number and you can cycle through the folders (max 16). It would be more convenient if a folder could be selected by number too, though.
As a digital transport my first impressions (using SPDIF) are that it is at least equal to my 'Shigaclone' transport. In the near future I plan to make use of the I2S output that is available on the circuit board.

John
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Old 20th August 2009, 12:57 PM   #57
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in my opinion, we can't use internal PLL please refer to the dspic datasheet, the jitter of the PLL is 0.5-3.0% !!!!

so the better way is using 2 dsPIC

SD card->dsPIC1(PLL full speed 40MIPS)->[wav data out via SPI or other port]
->SPI WAV data in->dsPIC2(NO PLL,11.2896MHz TCXO only)->DCI/I2S digital out.

i strong recommend you to using two dsPIC33FJ64GP802 (28pin DIP)

only this way can eliminate the PLL jitter in the CPU!
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Old 20th August 2009, 02:58 PM   #58
Tolu is offline Tolu  Germany
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I hope the developers increase the capacity to at least 32 GB and no restrictions to number of folders and titles.

A bigger display (2x20 chars) would be great, too.

I want to marry it with 4x TDA1543 D/A over I2S. The DAC with one TDA1543 from the same guys works perfect. I am very pleased with it after some mods. The short fall is the low output level (0.7 Vrms) which is a little less to drive my passive pre. But sound is great!
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Old 20th August 2009, 08:39 PM   #59
EUVL is offline EUVL  Europe
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All these extra wishes costs money, and then you will complain the price is too high.

To get exact what you want, there is only one way out -- DIY.

We have tested the QA550 with SPDIF, but that is not the goal. We have not tested I2S yet. Will take a while. Perhaps some of you would have beateb ne to that.


Patrick
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Old 20th August 2009, 10:44 PM   #60
Tolu is offline Tolu  Germany
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Except of the display the rest is just a software issue with no extra costs!
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