You will need
- Linear magnet in the form of a strip, the axis of the two spools from under the thread No. 10 wire with enamel insulation wooden frame (ready or electric motor from any children's toys), sewing thread.
In the middle of the linear magnet is in the form of a metal strip drill a hole (it is designed for the axis), then connect the magnet to the axle.
Wrap the coil from under the thread wire with enamel insulation (its diameter should be 0.25 mm) so as to fill the frame.
Attach the coil on a wooden frame. Mounted on the axis of the magnet should rotate between their ends.
Consistently connect the coil. The voltage across the terminals when the magnet is rotated should be the maximum – this can be checked experimentally. Your engine is ready, it can be used to create a generator of alternating current.
The motor shaft to wind the thread. If the motor terminal to connect a small light bulb and pull the thread, the bulb will light up.
Be sure to use a strong sewing thread, otherwise your generator will run long. To test the strength you can, stretching the filament by hand. Good thread will bounce, and it will not break immediately. The strength of the thread depends on the thickness, it decreases with an increase in numbers (that is, the most durable will be threads No. 00). Please note that the white threads are more durable than colored. Most quickly breaks black thread.
Rotate the engine you can not just hand thread. You can also use prop: get a miniature wind power plant. The voltage will depend on the speed of the engine. The speed can be increased, taking advantage of a pulley: you need to put on a large pulley on the axis of the propeller and a small motor axle.