Given the variety of… uh, non-traditional hardware that’s connected to my home theater, I’ve found the ground isolation provided by optical TOSLINK connections pretty handy. After poking around a bit, I found a stand alone coax to optical converter. It uses a hex inverter to convert the signals to TTL levels, and a Sharp (or toshiba with some extra components) optical transmitter.

16 thoughts on “DIY TOSLINK To SP/DIF Converter

  1. This really is for the DIY’r because you can buy a coax to optical converter for about $20-$35 online (depending on how good a deal you can find… shows one for a sticker price of 30.52 and pricewatch shows one for $22 shipped from I like building stuff… but my time is better spent building things that I can’t get for the price of parts by a good margin… like maybe one of those DIY projectors… or something that simply isn’t available period.

  2. Id love to see an optical to headphone jack conversion project. some true fta satellite channels only send ac3 signal, Id love to have an adapter so I could take just the left and right signal from the ac3 and use it on my cheapie stereo.

  3. @thijs
    well maybe I don’t have a shop that’s cluttered with extra parts considering I’m still paying off debts from college and married and live in an apartment. My point is that one can sometimes better spend their money on manufactured products and spend their time on projects that are truly original. Now back when this project first came about, it was original. It’s been picked up by a manufacturer and now it’s a mass product. Make a bi-di model, that would be original.

  4. I want to try this with my wireless antenna project. I figure if i have the antenna on the roof and 6 inches of cable to the converter then optical and another converter for optical in and 6 inches of Coax out then there wouldn’t be much to Null attenuation. Any one point me to a reverse set of plans?

  5. is possible to re-wire a USB cable to an ethernet cat 5?

    Here is my problem: I have a USB only adsl moden and I want to route it into my wireless modem. But my wireless modem has only CAT 5 connections. I would like to know a quick dirty way to patch it.

    Please reply to


  6. I need help on converting USB-> cat 5 ethernet connector.

    What I’m try to resolve is I have an adsl modem with USB connction only and I would like to route into my newly purchased wireless router. However, the wireless router has only ethernet cat 5 connections..
    does anyone knows how to do quick and dirty way to patch it?

    I know there’re commercial converter out there, but it costs quite some..

    please reply to


Leave a Reply

Please be kind and respectful to help make the comments section excellent. (Comment Policy)

This site uses Akismet to reduce spam. Learn how your comment data is processed.