A friend just moved offices and he’s now directly across the street from me. The idea is that two transceivers would communicate with each other using visible and infrared light. People on either end could send a message to the other office. The visible light would be sent as morse code, so to a trained observer, the messages would not be private. Also, the transceivers would automatically identify themselves on a regular basis, the identity could include a URL for more information about the project, or even a way to send a message.
I thought this would be a fun little project that would foster some interoffice camaraderie. The idea is far from unique, and it’s a bit redundant given that we could contact each other in a variety of other ways–but it would still be fun to build. However, I’ve given up on the idea for now given that the security people from both firms would rip these transceivers out the moment they found them.