There is a USB -> SPDIF pcb group buy over at head-fi. The corresponding diyaudio link is here:
http://www.diyaudio.com/forums/showthread.php?s=&postid=595155
It is based upon the TI, PCM2902 chip. Shipping and fees will be £1.50 internationally, and £1 to the UK, regardless of the number ordered. Please note, this design has NOT been prototyped, you are buying as is!
Current price for 75 boards: €2.04 ($2.72)
The head-fi group buy link is here!
The original project log is here
If you aren't registered at head-fi.org ... pm Nisbeth and I'm sure he'll be able to transfer your details to guzzler at head-fi.org 🙂
Parts list:
1 x PCM2902 (SSOP28)
1 x 74HC04 (SO14)
1 x TPS793 4.75V (SOT23-5) (possibly optional)
1 x 560µF 6.3V Panasonic FC
2 x 22µF 10V OS-CON SC (or equivalent similar, FCs are fine)
4 x 1µF Wima MKS-02 (or similar, tantalum should be ok, 2.54mm pitch)
1 x 100nF 5mm (0.2") pitch capacitor (Wima MKS-2 or similar)
5 x 100nF 0805 ceramic capacitors
1 x 10nF 0805 ceramic capacitor
2 x 33pF 0805 ceramic capacitors
1 x 1M 0805 resistor
1 x 1K5 0805 resistor
2 x 22R 0805 resistor
1 x 91R 7.5mm resistor (Vishay Dale appropriate, or generic 1% metal film)
1 x 360R 7.5mm resistor (Vishay Dale Appropriate, or generic 1% metal film)
1 x generic resistor for LED, V ~ 4.5V
1 x 12MHz HC49 crystal oscillator
1 x 10µH 1210 package inductor
1 x USB B-type connector
1 x 3mm low voltage LED
1 x RCA socket
1 x case
1 x USB cable
Digikey Codes:
# Descr .................................................. .......... Digikey Part #..........Price / min quantity
1 x PCM2902 (SSOP28) ................................................. 296-12986-5-ND ........ $9.00 / 1
1 x 74HC04 (SO14) .................................................. . 296-12883-1-ND ........ $0.44 / 1
1 x TPS793 4.75V (SOT23-5) <-- pain to solder! ....................... 296-12160-1-ND ........ $1.14 / 1
1 x 560µF 6.3V Panasonic FC .......................................... P12705-ND ............. $0.48 / 1 (backordered)
2 x 22µF 10V OS-CON SC (or equivalent similar, FCs are fine) ......... P11213-ND ............. $0.32 / 1 (inexact match - 25V (6.3V available))
4 x 1µF Wima MKS-02 (or similar, tantalum should be ok, 2.54mm pitch). 399-1337-ND ........... $0.41 / 1 (tantalum - 25V)
5 x 100nF 0805 ceramic capacitors .................................... PCC1843CT-ND .......... $0.06 / 10 (panasonic ecg)*
1 x 100nF 5mm (0.2") pitch capacitor (Wima MKS-2 or similar) ................ 495-1103-ND .... $0.17 / 1 (EPCOS INC)*
1 x 10nF 0805 ceramic capacitor ...................................... PCC1991CT-ND .......... $0.09 / 10 (panasonic ecg)
2 x 33pF 0805 ceramic capacitors ..................................... PCC330CGCT-ND ......... $0.05 / 10 (panasonic ecg)
1 x 1M 0805 resistor ................................................. RR12P1.0MDCT-ND ....... $0.15 / 10 (sasumu 0.5%, .1W)
1 x 1K5 0805 resistor ................................................ RR12P1.5KDCT-ND ....... $0.15 / 10 (sasumu 0.5%, .1W)
1 x 91R 7.5mm resistor (Vishay Dale appropriate, or generic 1% metal film) ... P91.0CACT-ND .. $0.17 / 10 (Panasonic - ECG)*
1 x 360R 7.5mm resistor (Vishay Dale Appropriate, or generic 1% metal film) .. P360CACT-ND ... $0.17 / 10 (Panasonic - ECG)*
2 x 22R 0805 resistor ................................................ RR12Q22DCT-ND ......... $0.15 / 10 (sasumu 0.5%, .1W)
1 x 12MHz HC49 crystal oscillator .................................... CTX058-ND ............. $0.94 / 1
1 x 10µH 1210 inductor ............................................... DN10103JCT-ND ......... $1.02 / 1
1 x USB B-type connector ............................................. WM17109-ND ............ $1.94 / 1
1 x 3mm low voltage LED .................................................. .. HLMP1700-ND .... $0.35 / 1 (Fairchild Opto)*
1 x generic resistor for LED, V ~ 4.5V ...................................... 4.32KXBK-ND .... $0.10 / 5 (Yageo -- you should check my math to see if this is actually appropriate, I just guessed )*
1 x RCA socket
1 x case
1 x USB cable
http://www.diyaudio.com/forums/showthread.php?s=&postid=595155
An externally hosted image should be here but it was not working when we last tested it.
It is based upon the TI, PCM2902 chip. Shipping and fees will be £1.50 internationally, and £1 to the UK, regardless of the number ordered. Please note, this design has NOT been prototyped, you are buying as is!
Current price for 75 boards: €2.04 ($2.72)
The head-fi group buy link is here!
The original project log is here
If you aren't registered at head-fi.org ... pm Nisbeth and I'm sure he'll be able to transfer your details to guzzler at head-fi.org 🙂
Parts list:
1 x PCM2902 (SSOP28)
1 x 74HC04 (SO14)
1 x TPS793 4.75V (SOT23-5) (possibly optional)
1 x 560µF 6.3V Panasonic FC
2 x 22µF 10V OS-CON SC (or equivalent similar, FCs are fine)
4 x 1µF Wima MKS-02 (or similar, tantalum should be ok, 2.54mm pitch)
1 x 100nF 5mm (0.2") pitch capacitor (Wima MKS-2 or similar)
5 x 100nF 0805 ceramic capacitors
1 x 10nF 0805 ceramic capacitor
2 x 33pF 0805 ceramic capacitors
1 x 1M 0805 resistor
1 x 1K5 0805 resistor
2 x 22R 0805 resistor
1 x 91R 7.5mm resistor (Vishay Dale appropriate, or generic 1% metal film)
1 x 360R 7.5mm resistor (Vishay Dale Appropriate, or generic 1% metal film)
1 x generic resistor for LED, V ~ 4.5V
1 x 12MHz HC49 crystal oscillator
1 x 10µH 1210 package inductor
1 x USB B-type connector
1 x 3mm low voltage LED
1 x RCA socket
1 x case
1 x USB cable
Digikey Codes:
# Descr .................................................. .......... Digikey Part #..........Price / min quantity
1 x PCM2902 (SSOP28) ................................................. 296-12986-5-ND ........ $9.00 / 1
1 x 74HC04 (SO14) .................................................. . 296-12883-1-ND ........ $0.44 / 1
1 x TPS793 4.75V (SOT23-5) <-- pain to solder! ....................... 296-12160-1-ND ........ $1.14 / 1
1 x 560µF 6.3V Panasonic FC .......................................... P12705-ND ............. $0.48 / 1 (backordered)
2 x 22µF 10V OS-CON SC (or equivalent similar, FCs are fine) ......... P11213-ND ............. $0.32 / 1 (inexact match - 25V (6.3V available))
4 x 1µF Wima MKS-02 (or similar, tantalum should be ok, 2.54mm pitch). 399-1337-ND ........... $0.41 / 1 (tantalum - 25V)
5 x 100nF 0805 ceramic capacitors .................................... PCC1843CT-ND .......... $0.06 / 10 (panasonic ecg)*
1 x 100nF 5mm (0.2") pitch capacitor (Wima MKS-2 or similar) ................ 495-1103-ND .... $0.17 / 1 (EPCOS INC)*
1 x 10nF 0805 ceramic capacitor ...................................... PCC1991CT-ND .......... $0.09 / 10 (panasonic ecg)
2 x 33pF 0805 ceramic capacitors ..................................... PCC330CGCT-ND ......... $0.05 / 10 (panasonic ecg)
1 x 1M 0805 resistor ................................................. RR12P1.0MDCT-ND ....... $0.15 / 10 (sasumu 0.5%, .1W)
1 x 1K5 0805 resistor ................................................ RR12P1.5KDCT-ND ....... $0.15 / 10 (sasumu 0.5%, .1W)
1 x 91R 7.5mm resistor (Vishay Dale appropriate, or generic 1% metal film) ... P91.0CACT-ND .. $0.17 / 10 (Panasonic - ECG)*
1 x 360R 7.5mm resistor (Vishay Dale Appropriate, or generic 1% metal film) .. P360CACT-ND ... $0.17 / 10 (Panasonic - ECG)*
2 x 22R 0805 resistor ................................................ RR12Q22DCT-ND ......... $0.15 / 10 (sasumu 0.5%, .1W)
1 x 12MHz HC49 crystal oscillator .................................... CTX058-ND ............. $0.94 / 1
1 x 10µH 1210 inductor ............................................... DN10103JCT-ND ......... $1.02 / 1
1 x USB B-type connector ............................................. WM17109-ND ............ $1.94 / 1
1 x 3mm low voltage LED .................................................. .. HLMP1700-ND .... $0.35 / 1 (Fairchild Opto)*
1 x generic resistor for LED, V ~ 4.5V ...................................... 4.32KXBK-ND .... $0.10 / 5 (Yageo -- you should check my math to see if this is actually appropriate, I just guessed )*
1 x RCA socket
1 x case
1 x USB cable
I tried following a couple links to find out what this thing an be used for ? In a nutshell, what's a good use for it ?
Member
Joined 2002
It will give you S/PDIF output from the USB port of a computer using any OS that natively supports USB (WinXP, Linux, Mac OSX etc). Particularly handy for laptops, or PCs with no digital output to a DAC.
g
g
guzzler said:
..and from the PCM2902 you can have also S/PDIF input and analog in/out.
In this project these features are not implemented, but the chip's pins are there, and working 😉 (although it's not so funny soldering them!)
I used the PCM2902 family chips in another project (a complete USB soundcard) and it works really fine.
Member
Joined 2002
paologatto said:
I am very interested in learning more about your USB soundcard project. Can you point to any links that might provide more details?
Thanks!!!
paologatto said:
Originally, I sent you a PM asking this question. I don't think my PM privledges have been granted since I'm a relatively new member of the forums.
I haven't been able to post any new messages yet, either.
Does this mean I can get a direct digital feed from my Mac/PC?
iTunes/WMP/etc -> USB -> SPDIF -> digital input to receiver/pre
Yum.
iTunes/WMP/etc -> USB -> SPDIF -> digital input to receiver/pre
Yum.
Member
Joined 2002
I'm using something alike, built on veroboard. I use it for playing music from my laptop which doesn't have an spdif out. Monkeys audio or other lossless music formats played with foobar2000 go to my rotel surround preamp which i use as a dac.
it;s hard to get a bit perfect spdif signal though... 2 channel audio is always routed through kmixer (unless you use something like kernel streaming or an asio wrapper), ac3-like formats aren't supported by the current usb audio wdm driver but dts multichannel works great.
there's probably a whole lot more information to be found on this subject at head-fi.
it;s hard to get a bit perfect spdif signal though... 2 channel audio is always routed through kmixer (unless you use something like kernel streaming or an asio wrapper), ac3-like formats aren't supported by the current usb audio wdm driver but dts multichannel works great.
there's probably a whole lot more information to be found on this subject at head-fi.
Paolo, why don't you start a new thread with details of your interface? I'm sure there are many, (me included), that would like to have a look at your implementation. 🙂
pinkmouse said:
Well.. ok, I'll do as soon as I have some spare time.
In the meantime, I posted some pictures on this thread at Head-Fi:
http://www6.head-fi.org/forums/showpost.php?p=1238932&postcount=67
and some other pictures are on my website (see [WWW] button below 🙂 )
Bye
- Status
- Not open for further replies.