Comment by ghusbands

1 month ago

The inhibition of movement via eddy currents works best while the needle is moving fast, so you can still end up with smaller oscillations for a while - the apparent jump-cut to a stationary needle could be hiding that.

It's far easier to just use a compass with a needle brake - manually dampen the oscillation using the brake (and let go to ensure you aren't holding an incorrect reading) and you get a reading quickly.

Not sure holding a break and making sure to release it to have a correct reading is any easier than something like this (if this is real).