iPhone can’t do this. (Antique magneto power demonstration.)

PLEASE DO NOT TRY THIS. Antique telephones have a hand crank connected to a magneto to generate a direct current. The output can get shockingly high, and hand-cranks like this were at one time used illegally to "phone fish", causing any fish near the current to float to the surface.

For educational and demonstrational purposes.

Видео iPhone can’t do this. (Antique magneto power demonstration.) канала TheCrafsMan SteadyCraftin