Two-mode laser transmitter and receiver
At the 2005 National BSA Jamboree, I saw a demonstration of a QSO via laser. I recently found the document I had been given at that time and am uploading it here as I can find very little mention of it online. I have not built this, and obviously the component prices no longer apply as RadioShack has long been out of business.
I had written KA8MID across it at the time; I am unsure if that was the person doing the demonstration, or the designer. If anyone has additional information, please contact me so I can credit the appropriate source.