1 Collect Materials: You will need a small DC motor, a gearbox, an LED, and some wires.
2 Attach the Gearbox: Secure the gearbox to the shaft of the DC motor. The gearbox will help to amplify the speed of rotation, making the motor more efficient as a generator.
3 Connect the LED: Use wires to connect the LED to the terminals of the DC motor. Make sure the connections are tight and stable; you may use solder or tape to secure them.
4 Hand Crank the Motor: Hold the assembly and turn the gearbox with your hand. This manual effort will spin the motor's shaft, converting mechanical energy into electrical energy.
5 Light the LED: As you crank the gearbox, the DC motor will generate electricity and power the LED. When you spin it fast enough, the LED will light up, showing that your mini dynamo motor is generating power.