As a Yank, first thought that came to mind was using geolocation by mains hum because you can.
You can…but, won’t the frequency will be stable across the UK grid and these are all in London. Secondly, pretty sure they all use DC motors, so no hum
alt Hacker News
You can…but, won’t the frequency will be stable across the UK grid and these are all in London. Secondly, pretty sure they all use DC motors, so no hum