3 ms·

> But I'd start with the most basic question - is your antenna even outside of the building? :) Why not monitor electrical interference inside the home? You co

> But I'd start with the most basic question - is your antenna even outside of the building? :) Why not monitor electrical interference inside the home? You could work out when your dishwasher has finished, the different parts of a washing machine program, vacuum cleaner, when the kettle is switched on and off, the fridge/freezer, tv, hifi, lights. You can learn alot about peoples home life and their patterns just from picking up electrical interference of devices. Who needs to hack CCTV to see inside someone's house? :)

_whiteCaps_ 3y ago
I interviewed at a startup building a product that was doing exactly that. Well, it was a sensor on the mains power but same idea.
- darkclouds 3y ago
  The RaspberryPi is very versatile. https://forums.raspberrypi.com/viewtopic.php?t=27922#p248364 https://forums.raspberrypi.com/viewtopic.php?t=27922#p248364 What does it take to make an antenna of sorts? Now who trusts their operating systems?
H8crilA 3y ago
Because he is just starting, so it will be a lot easier to pick up the many usual signals that exist pretty much everywhere. Like broadcast, police/emergency radio, pagers, aircraft comms or data, satellites, HF communication, ...
- darkclouds 3y ago
  They might be in an otherwise radio silent part of the world though. And how hard is it recording the electrical interference of a device from the same room and then from other rooms, to establish the variability of its electrical "interference/signal" properties? Knowing about the Theremin, a Russian electrical instrument invented in 1919, is similar to walking around a house with mains electricity is an audible example of the interference in our homes which we interact with. https://www.youtube.com/watch?v=-QgTF8p-284 https://www.youtube.com/watch?v=-QgTF8p-284 Could even do human detecting wifi signals. https://discovery.ucl.ac.uk/id/eprint/10103371/1/Passive%20WiFi%20Radar%20for%20Human%20Sensing%20Using%20A%20Stand-Alone%20Access%20Point.pdf https://discovery.ucl.ac.uk/id/eprint/10103371/1/Passive%20W... If someone can detect multiple wifi signals, the are effectively inside a phased array radar system.
  - H8crilA 3y ago
    > They might be in an otherwise radio silent part of the world though > Could even do human detecting wifi signals I can confidently say that you have never tried to do anything with radio.
    - darkclouds 3y ago
      I've experienced it, because I have FE(II,III) in me, so have you. https://web.gps.caltech.edu/~jkirschvink/pdfs/JoeMicrowave.pdf https://web.gps.caltech.edu/~jkirschvink/pdfs/JoeMicrowave.p... https://ui.adsabs.harvard.edu/abs/2019AGUFMGP23B0794P/abstract https://ui.adsabs.harvard.edu/abs/2019AGUFMGP23B0794P/abstra... https://www.pnas.org/doi/10.1073/pnas.1613349113#:~:text=In%20these%20organisms%2C%20magnetite%20forms,in%20PNAS%2C%20Maher%20et%20al https://www.pnas.org/doi/10.1073/pnas.1613349113#:~:text=In%.... Still confident or have you spent too long on your mobile phone that you cant remember? The quieter you become, the more you are able to hear.

_whiteCaps_ 3y ago

I interviewed at a startup building a product that was doing exactly that. Well, it was a sensor on the mains power but same idea.

darkclouds 3y ago
The RaspberryPi is very versatile. https://forums.raspberrypi.com/viewtopic.php?t=27922#p248364 https://forums.raspberrypi.com/viewtopic.php?t=27922#p248364 What does it take to make an antenna of sorts? Now who trusts their operating systems?

H8crilA 3y ago

Because he is just starting, so it will be a lot easier to pick up the many usual signals that exist pretty much everywhere. Like broadcast, police/emergency radio, pagers, aircraft comms or data, satellites, HF communication, ...

darkclouds 3y ago
They might be in an otherwise radio silent part of the world though. And how hard is it recording the electrical interference of a device from the same room and then from other rooms, to establish the variability of its electrical "interference/signal" properties? Knowing about the Theremin, a Russian electrical instrument invented in 1919, is similar to walking around a house with mains electricity is an audible example of the interference in our homes which we interact with. https://www.youtube.com/watch?v=-QgTF8p-284 https://www.youtube.com/watch?v=-QgTF8p-284 Could even do human detecting wifi signals. https://discovery.ucl.ac.uk/id/eprint/10103371/1/Passive%20WiFi%20Radar%20for%20Human%20Sensing%20Using%20A%20Stand-Alone%20Access%20Point.pdf https://discovery.ucl.ac.uk/id/eprint/10103371/1/Passive%20W... If someone can detect multiple wifi signals, the are effectively inside a phased array radar system.
- H8crilA 3y ago
  > They might be in an otherwise radio silent part of the world though > Could even do human detecting wifi signals I can confidently say that you have never tried to do anything with radio.
  - darkclouds 3y ago
    I've experienced it, because I have FE(II,III) in me, so have you. https://web.gps.caltech.edu/~jkirschvink/pdfs/JoeMicrowave.pdf https://web.gps.caltech.edu/~jkirschvink/pdfs/JoeMicrowave.p... https://ui.adsabs.harvard.edu/abs/2019AGUFMGP23B0794P/abstract https://ui.adsabs.harvard.edu/abs/2019AGUFMGP23B0794P/abstra... https://www.pnas.org/doi/10.1073/pnas.1613349113#:~:text=In%20these%20organisms%2C%20magnetite%20forms,in%20PNAS%2C%20Maher%20et%20al https://www.pnas.org/doi/10.1073/pnas.1613349113#:~:text=In%.... Still confident or have you spent too long on your mobile phone that you cant remember? The quieter you become, the more you are able to hear.