@gunrunnerjohn posted:Can't help you with the CC-Lite, but if you're energetic, you can build the Sound Converter. Jon released the code under the GNU license, and the schematics of the board are also available. I'm not sure which whistle controller you're talking about, but if it's the one that's in the Hobby Section of the ERR site, it's easy to build. Below is the clip from the Hobby Section on ERR.
The SSR specified isn't available on Digikey or Mouser any longer, but they're available from overseas sources.
On the original ERR site was there a link to purchase the raw board to build the Sound Converter ? Some how I keep thinking there was. If not, sure would be great if someone with the skills to design boards would do so and sell a few. Hint Hint 
j
