1: Take a four-wheel drive motor, put a ballpoint pen refill on the shaft, connect a diode to the output end of the motor, wrap a rope around the refill, and then pull quickly on the rope to turn. on the light.
2: It’s very simple. Electricity can produce magnetism, and magnetism can also produce electricity. You need a motor, and you also need power to drive the motor. The input end of the motor is also the output. END. Use a bridge. Method, connect 4 diodes to rectify, the output voltage is stable and it will light up when connected to a light bulb.
3: A windmill, a motor, a small wind turbine, light bulb , wires
In the process of converting wind energy into mechanical energy~
The mechanical power should be as high as possible~
The weight of Windmill blades should be small~
There is also a difference in the number of blades you choose~
This needs to be tested by yourself~
You also need a transmission device and transmission~
Since the speed of the windmill will not be too high~
It is necessary to accelerate the speed through a transmission device~
Just use a gearbox~
The step of converting mechanical energy into electrical energy~
Due to lz, the required voltage is not not big~
Just use a general fixed pole generator~
The output voltage is unstable~
It is necessary If so , add a voltage stabilizing circuit to the output~
4: How big should it be? As long as you have a small four-wheel drive motor, connect it to an electrical device like a small light bulb, turn its shaft, and find a way to increase its speed, it'st everything. In fact, the principles of generators and. the engines are the same. It's just that the process is reversed.
You can also use a chemical method, using a primary battery, which involves inserting an iron wire and a copper wire into an apple. It doesn't have to be iron and copper, as long as it is. Different materials are ok, have fun~!