GB of PCB's for USB->SPDIF converter at head-fi

Nisbeth · 8th March 2005, 04:19 PM

In case anyone's interested, there's an ongoing group buy of a small PCB for a USB->SPDIF-converter based on TI's PCM2902 IC. The head-fi thread for the group-buy is here:

http://www6.head-fi.org/forums/showthread.php?p=1279489

and the original thread for the project is here:

http://www6.head-fi.org/forums/showthread.php?p=1279489

/U.

iamwhoiam · 11th March 2005, 06:44 PM

Hey cool, I want one

tiroth · 11th March 2005, 08:13 PM

Anyone know, can you stick a whole bunch of these USB DACs into a computer and use it with ASIO software?

To anyone who has not journeyed to headfi, these boards are silly cheap.

Nisbeth · 11th March 2005, 08:21 PM

The information is available here as well: http://www.diyaudio.com/forums/showt...176#post595176

/U.

seoman · 11th March 2005, 08:32 PM

@ Tiroth

Try a seccond hand terratec EWS88D.
That's 9digital in 9 digital out. ASIO and ADAT interface
I have seen prices of 100€

(I have it's DAC based brother MT version and i'm very pleased with its asio performance)

tiroth · 14th March 2005, 06:22 PM

Thanks for the tip!

gmarsh · 15th March 2005, 12:27 AM

ooh, neat... however, I just sent out some gerbers for this little USB->optical board about half an hour ago.

I'll post the eagle files if anyone wants them. The picture was done in Eagle3D, which is one of the handiest programs ever created...

Nisbeth · 15th March 2005, 06:33 AM

Quote:

Originally posted by gmarsh
ooh, neat... however, I just sent out some gerbers for this little USB->optical board about half an hour ago.

Very nice!

Quote:

Originally posted by gmarsh
I'll post the eagle files if anyone wants them.

I do!

/U.

gmarsh · 19th March 2005, 12:32 AM

Here's the eagle files (usbspdif.brd, usbspdif.sch) and "mine.lbr", which contains a few custom parts used in the design.

Some parts notes:

- USB connector is a Molex 67068.
- optical transmitter is a TOTX179P... make sure you get the P part, or it won't fit in the PCB.
- C7/C8 are 0603-case, NP0 dielectric.
- C5/C6/C9 are 0805-case, 10uF, 6.3V X5R ceramics.
- All other capacitors are 1uF, 0603, 6.3V X5R's.

You can get everything from Digi-key.

I ordered ten of these PCBs; they occupied the remaining space on a larger board which I ordered. I'll probably use 3 or 4, so I might mail out the remainder to people if anyone's interested.

edit: and no flames over using an optical interface instead of coaxial.

iamwhoiam · 19th March 2005, 11:32 AM

How much per board?

8th March 2005, 04:19 PM	#1
Nisbeth diyAudio Member Join Date: Jan 2001 Location: Denmark	GB of PCB's for USB->SPDIF converter at head-fi In case anyone's interested, there's an ongoing group buy of a small PCB for a USB->SPDIF-converter based on TI's PCM2902 IC. The head-fi thread for the group-buy is here: http://www6.head-fi.org/forums/showthread.php?p=1279489 and the original thread for the project is here: http://www6.head-fi.org/forums/showthread.php?p=1279489 /U.

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11th March 2005, 06:44 PM	#2
iamwhoiam diyAudio Member Join Date: Jan 2005 Location: Hull, England	Hey cool, I want one

11th March 2005, 08:13 PM	#3
tiroth diyAudio Member Join Date: Dec 2001 Location: Pittsburgh, PA, USA	Anyone know, can you stick a whole bunch of these USB DACs into a computer and use it with ASIO software? To anyone who has not journeyed to headfi, these boards are silly cheap.

11th March 2005, 08:21 PM	#4
Nisbeth diyAudio Member Join Date: Jan 2001 Location: Denmark	The information is available here as well: http://www.diyaudio.com/forums/showt...176#post595176 /U.

11th March 2005, 08:32 PM	#5
seoman diyAudio Member Join Date: Apr 2004 Location: Nijmegen	@ Tiroth Try a seccond hand terratec EWS88D. That's 9digital in 9 digital out. ASIO and ADAT interface I have seen prices of 100€ (I have it's DAC based brother MT version and i'm very pleased with its asio performance)

14th March 2005, 06:22 PM	#6
tiroth diyAudio Member Join Date: Dec 2001 Location: Pittsburgh, PA, USA	Thanks for the tip!

19th March 2005, 11:32 AM	#10
iamwhoiam diyAudio Member Join Date: Jan 2005 Location: Hull, England	How much per board?

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