Operated by a hand crank.
Articles by others on the same topic
Hippolyte Pixii was a French inventor known for his contributions to the development of electromagnetic devices in the early 19th century. He is best remembered for inventing the first practical dynamo, a device that converts mechanical energy into electrical energy through electromagnetic induction. Pixii's dynamo, built in 1832, utilized a rotating magnet to produce alternating current (AC).