How can I Power a 20-50mA LED from the 240V AC Wires of a Motor in a Safe Way?
This motor has a nicely exposed coil.
If you wind some turns of wire around this coil, presto you get a transformer.
Just wind enough turns to get about 2 volts, and feed that to a red LED.If you want a color with a higher Vf, that'll need more turns, so more work. Add a resistor in series to limit the current. Wrap some Kapton tape around the coil to keep it neat.
The LED will also be isolated from mains. It will be driven with AC though. The usual reverse voltage for LEDs is 5V so it should be fine. You can put two SMD LEDs wired antiparallel too.