1. The fan on the computer uses DC 12V power supply, and then uses a circuit to drive the fan. The general fan circuit diagram is as follows:
2. If there are 3 wires, One of them is the output line of the speed measurement signal. If there are 4 wires, the other two are the speed measurement and speed regulation lines.
3. Therefore, it is impossible to make a small generator using the fan on the computer.
4. If you want to modify a small generator, please use a general DC permanent magnet motor, that is, a small motor commonly used on toys. As long as the speed is fast enough, it can generate a small current. As shown in the picture (the picture below is the effect produced by blowing an electric fan against it, and the LED lights up):
Does anyone know how to make a homemade small wind turbine
If you are using it as a charger, please connect a diode in series to one end of the output line. If you are using it as lighting, it only needs a driving motor to rotate.
The driving method can be tap water, bicycle, manual wind, etc. I It is recommended to use tap water to inject the tap water holes into the fan blades. If successful, buy some heat capacity glue and make a box to surround the water flow, and it will be perfect
First of all, you need a generator motor. If you are making a miniature wind turbine, the motor of a four-wheel drive vehicle can be used instead. Then you can put the fenders you have made on the front rotor head of the motor to attract wind, and when the wind blows the motor rotor When rotating, the two wire ends at the rear end of the motor can generate electricity. This is the power generation principle of the wind turbine, but this can only generate electricity and has no practicality.
Secondly, if you need a truly practical micro wind turbine, you need to perform the following steps and prepare some materials, such as a diode and a voltage regulator (voltage stabilizing circuit). board), a battery, etc.
When you prepare these materials, you can first connect one wire end of the generator motor to a diode to prevent the generated power from flowing back to the motor, and then connect it to the voltage regulator (a reminder here) The voltage stabilizing power of the voltage stabilizer needs to be determined in advance, and it needs to meet the parameter requirements of the voltage generated by the motor to prevent the voltage stabilizing circuit board from burning) before connecting the battery to the voltage stabilizer (the battery voltage must also be stable. (within the rated parameters of the voltage) and you're done. When the wind drives your motor to rotate, the electricity generated will be processed by the voltage stabilizing circuit and stored in the battery~