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| ▲ | bigiain 2 hours ago | parent | next [-] |
| I had a Timex Data Watch over 30 years ago. https://en.wikipedia.org/wiki/Timex_Datalink It'd transfer phone numbers and calendar entries to the watch by blinking the screen of your computer. Kinda a 1 pixel version of this. (I wonder where that ended up? From memory I threw it in a drawer when I finished the Windows 95 project I'd been working on, and switched to Mac. There was no Mac software to talk to it.) |
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| ▲ | atoav an hour ago | parent [-] | | I have seen digital audio gear that solved firmware transfer like that. You basically go to a website on your phone and it flickers the screen and you hold it in front of a photosensitive bit of the device that needs to be updated for 20 seconds and done. If your firmware is small enough to fit that model, it isn't a bad variant. Beats downloading a file, transferring it to a USB drive, sticking that in,... | | |
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| ▲ | kooi 2 hours ago | parent | prev | next [-] |
| As someone who has implemented acoustic modems (underwater comms)... yes, yes very annoying. It's like a demonic dolphin. Bringing it into the ultra sonic band would help. |
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| ▲ | ErroneousBosh an hour ago | parent | prev [-] |
| You can do PSK31 across a room with just audio, but it is a kind of annoying noise after a while. It's interesting that you learn to recognise patterns in the burbling tones after a while. "CQ CQ CQ" is very distinctive and after a while you can hear your own callsign in it. I guess it's not that different to very fast Morse. |
