Ha, there's one radio clock in my house that I still keep going for sentimental reasons... it's had a rough time setting itself for a few years, likely due to its placement in the house.
I'll have to test this out sometime, what a fun idea!
mikestew•48m ago
“One of the higher-frequency harmonics inevitably created by any real-world DAC during playback will then be the original fundamental, which should leak to the environment as a short-range radio transmission via the ad-hoc antenna formed by the physical wires and circuit traces in the audio output path.”
Sometimes I think I’m a smart guy…and then I read of people doing shit like this.
eps•16m ago
This is indeed truly incredible
... assuming it actually works :)
cvoss•36m ago
I once programmed my TI-84 calculator to do exactly this! The only missing thing was a circuit to convert the audio jack output voltage into the needed form for an antenna. I had the CS know-how but no EE know-how, so I never got it to work. It was fun to dream about confusing my high school's clocks though. (Sadly, the other obstacle was that the clocks only listened for the signal overnight, which improved their chances of detecting the weak broadcast out of far-away Colorado.)
wrs•1h ago
geerlingguy•1h ago
I'll have to test this out sometime, what a fun idea!