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How to get optical toslink spdif output from your DFI NF4 Mobo

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I have a home theater receiver that I wanted to send digital audio from my PC. My receiver has one RCA coax input and two optical toslink inputs. The RCA coax input is occupied by my cable box so I couldn't use the RCA digital output from my DFI NF4 Ultra-D. Sure, I could have got a RCA coax --> optical toslink converter, but who wants to do that when you can DIY.


I noticed that my DFI NF4 Ultra-D has pin-outs for SPDIF in/out. They are shown in the attached .pdf from the manual. It is jumper J3.


So all I needed to find was an optical toslink transmitter. After much googling, I found this Canadian website: http://www.sysconcept.ca/

They have a toslink optical transmitter for $4.99 USD http://www.sysconcept.ca/product_info.php?...products_id=159

And a toslink optical receiver for $4.99 USD http://www.sysconcept.ca/product_info.php?...products_id=157

They also have a wiring diagram for the transmitter and receiver (see the bottom of the page for the transmitter) http://www.sys-concept.com/toslink_receiver.htm


Mobo Connection J3

Pin 1 = +5V

Pin 2 = No Connection (Key)


Pin 4 = Ground

Pin 5 = SPDIF IN


Optical Transmitter

Pin 1 = Ground

Pin 2 = +5V

Pin 3 = SPDIF Signal


Use the attached wiring diagram to connect the pins. A 0.01 µF capacitor is used between the ground and +5V wires as a filter. I used an old audio cable that connects CD-Roms to Sound Cards for the wire.


Good Luck. If you have any questions let me know.


Note: you probably could use the toslink receiver linked above and Pin 5 from the mobo to get digital audio in to your PC, but I haven't tested this since I don't need it.

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Cool. Could have used this a few months ago. After burning out the one optical transmitter I had and the other one I ordered seemingly not working, I ended up buying a Turtle Beach USB -> optical converter. Others have used coaxial digital to optical converters.



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