You can apparently lock shopping trolleys using the same kind of principle - https://www.tmplab.org/2008/06/18/consumer-b-gone/
Time Station Emulator
11–20 of 62 posts
Re: Time Station Emulator
#12This is pretty darn cool, but I have to say I was somewhat let down by the WWVB signal. I was expecting the entire audible range instead of simply the extracted data. That being said, that's also really darn cool. I find the WWV/WWVB droning soothing somehow.
Err… WWVB has no audio range. The carrier frequency is only 60 kHz. It’s effectively a CW signal since the amplitude is only modulated once per second.
Re: Time Station Emulator
#13This is pretty darn cool, but I have to say I was somewhat let down by the WWVB signal. I was expecting the entire audible range instead of simply the extracted data. That being said, that's also really darn cool. I find the WWV/WWVB droning soothing somehow.
Here's an emulation of WWV I did with a transmit capable SDR.
Re: Time Station Emulator
#14Whenever I see things like this, my first thought is that somebody is going to write something to mess up nearby atomic clocks, just because they can, then I think- why, why did you do this?
Then someone will respond: you’re just catatrophising- anyone could’ve done this years before now, and I’ll say no, because it wasn’t up on frontpage HN there with code so that anyone would think of it. Then they’ll say, well why did you tell everyone that idea then! It’s your fault! Then I’ll say that someone would’ve done it if it weren’t me. Then I’ll go have a beer.
Re: Time Station Emulator
#15Shame there's no video demonstrating it working. It's a fun idea but without a demo, I'm left wondering about the efficacy.
I wasn't able to get this to work on a Pixel 8 in Chrome/Firefox on a JP region clock
Re: Time Station Emulator
#16This is pretty darn cool, but I have to say I was somewhat let down by the WWVB signal. I was expecting the entire audible range instead of simply the extracted data. That being said, that's also really darn cool. I find the WWV/WWVB droning soothing somehow.
Err… WWVB has no audio range. The carrier frequency is only 60 kHz. It’s effectively a CW signal since the amplitude is only modulated once per second.
There is an audible setting in the app that shifts the signal down to human range.
Re: Time Station Emulator
#17I can't tell if I'm fooling myself or if this actually (partially) worked. Is it possible for only the hour and seconds to sync if the signal isn't perfectly received? How long is it supposed to take to sync the time? Is it possible that this can confuse clocks that get a strong enough real signal while the phone is running this nearby?
I just tried it on a clock that has only ever successfully synced once many years ago, and it's still in the same bad location that never seemed to get a strong enough signal.
Its crappy little LCD animation did indeed seem to dance in sync with when I would turn the signal on and off on my phone. It took a few minutes of trying but then suddenly the hour and seconds updated to the exact time. Had to set the minutes manually :/
Re: Time Station Emulator
#18“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.
Came here to say this, I literally can't believe this works.
It's like a couple of years ago where someone showed a proof of concept of turning a HDD into a microphone
Re: Time Station Emulator
#19I read the title as 'Train Station Emulator'. :)
Re: Time Station Emulator
#20You can apparently lock shopping trolleys using the same kind of principle - https://www.tmplab.org/2008/06/18/consumer-b-gone/ And https://www.youtube.com/watch?v=LmSyb0kBvGE
He kind of buried the lede, there's another MP3 to unlock them.