schematic for an optical to SPDIF (coax) circuit

[jarthel]

I've search the forums and the net and general but came away somewhat empty.

I found discussions here and in other forums mentioning an epanorama article. but I am not sure which is applicable to my need.

can you please help?

thank you! 🙂

ps. I've found lots of ready made products but I'm trying to find a DIY solution 🙂

 

[TS Lo]

Hi,

You can find an article "opto-to-coaxial audio converter"
in the 04/97 issue of Elektor Electronics.

Cheers

TS

 

[sandyK]

Optical to SPDIF converter

jarthel

Have a look at the Silicon Chip website. This used to be available as a kit from Jaycar,but is no longer stocked.
SandyK

http://www.siliconchip.com.au/cms/A_107004/article.html

 

[anbello]

In this page
http://www.epanorama.net/documents/audio/spdif.html
you can find all the information you need to do your converter.

ciao
andrea

 

[xaudiox]

from silicon chip

 

[sandyK]

optical to SPDIF

xaudiox
I would remind you that the diagram you posted is copyright., and should not be posted in an open forum. It may have been much fairer to forward a copy by email to people who ask you by email ?
SandyK

 

[TS Lo]

Hi Sandyk,

You're right, thats why I didn't attach a copy
of the article mentioned in Post #2.

Cheeers
TS

 

[BrianDonegan]

You could just look at the datasheet for a Toslink receiver (TORX). They have a very simple circuit right there. We use it, works great.

http://www.toshiba.com/taec/components2/Datasheet_Sync//215/4898.pdf

http://www.twistedpearaudio.com/images/digital/torx_schematic.jpg

 

[anbello]

copyright yes copyright ...
but i see the same schematic on at least 3 other magazine and in numerous web site i think all copied by the same source: the link i give on post #4

@BrianDonegan:
your circuit is good but to have what is in the thread's title you have ta add a coax spdif driver: in the schematic proposed the hct04 in parallel plus coupling capacitor plus resistor network to have the right amplitude and output impedance. Maybe it's better to use an rs422/485 driver in place of the hct04.


ciao
andrea

 

[BrianDonegan]

@BrianDonegan: your circuit is good but to have what is in the thread's title you have ta add a coax spdif driver: in the schematic proposed the hct04 in parallel plus coupling capacitor plus resistor network to have the right amplitude and output impedance. Maybe it's better to use an rs422/485 driver in place of the hct04.

This would be true if a) you cannot utilize TTL level (3.3V) SPDIF and b) you will be transmitting the signal over some distance. Typically you would use the Optical for the distance, then convert locally at your destination. If you only need to go a few cm or inches, a driver is not needed. If you cannot use TTL, a simple resistor divider can be added for a few cents.

 

[Zoran]

c issue...
I think that things published in the public media are not c-r...
The comercial usage of the same often is prohibited...
that is the differance.
*
On the other hand, the datas published on the books might be
because the data are alredy c-r by writter and not go for profit usage,
but for education and non-for profit are free...
and second, the publisher c-r the publishing object, so
publisher preventing uncontroling publishing, without permision...
those are the diff.
*
If the sch found on the web like public mas-media, comercial usage is restricted,
but not the pointing or other copy-paste, publishing at the same media,
of course that does not include publishing at other public meda having comecial character,
like magazines, books...
*

 

[sandyK]

Copyright issue

Zoran

Quote from Silicon Chip Magazine.

"All material copyright "C" No part of this publication may be reproduced without the written consent of the publisher."

SandyK

 

[Zoran]

Sorry but You did not went throught my post...
*
Yes it coud, web, non-comercial, education, ONLY
printed, magazines, book NO
comercial usage NO

 

[Zoran]

of course without changing, and refering to the source,
with clear and correct informations
*
which is not the case in general...
*
We all know that some published things are hanging the origin at the web
that is not ethical.
*
Also it could be of interest to see the diff. b. the patent, and the c-r device...
thanks

 

[Sunjammer]

Toslink to Line Audio Converter schematic

Schematic, circuit operation, and construction details for a DIY Toslink to analog audio converter are available from this site. The circuit is similar to those offered commercially, but component selection is superior, as is performance, I would assume ....


Optical to analog audio converter irq5.io