A hand cranked generator is a portable device that converts human mechanical energy into direct current electrical energy. Users can drive the permanent magnet generator by rotating the handle to output stable power in scenarios without external power supply, suitable for emergency, teaching, outdoor and other scenarios. No need for fuel, no noise, zero emissions, 360 ° bidirectional rocking handle can work. Usage scenario: Demonstrate energy conversion, electromagnetic induction, and the relationship between power and speed. The disaster site provides power for walkie talkies, satellite phones, and emergency broadcasts. Outdoor camping lighting, drone battery recharge, and photography equipment endurance. Dual use design of foot pedal/hand crank, suitable for different groups of people to operate.