How much magnet? In which machines can be found? What materials do I need, do I want to use it to charge the battery? More
You let the magnet rotate inside the coil, and the poles of the coil have a voltage output. Voltage level and coil density, magnetic field strength, the magnet speed. DIY generator coil density and magnetic field strength difference is not a quasi-children, so you can only rely on adjusting the speed to control the voltage.
You find a bike in the past on the grinding of the generator can be, and that the basic machine about 10w, the specific calculation is too much trouble, the number of coils is indeed a full range of the end of the fool, but also to determine the number of rotations Wait. Moreover, it is best not to use it to charge the battery, the current and voltage are not stable, the battery damage.
The generator is simple. A magnet, a set of coils. Magnet what the requirements, the stationery shop to buy the students inside the magnet on it. Of course, if there are 3 watt or 5 watts of micro-speakers on the demolition of the magnet is better, as more magnetic. The coil with the Hai-han fool both You-hwan Feng Vuo Fu Leopard insulation of the fine copper wire around their own, from a small transformer on the demolition of the better
