How To Build A Magneto Magnetizer Pdf

1. Build A Magneto Magnetizer
2. How To Build A Magneto Magnetizer Pdf File
3. How To Build A Magneto Magnetizer Pdf Download

Most small lawn mowers, chain saws, trimmers and other small gasoline engines do not need a battery. Instead, they actually generate the power for the spark plug using a magneto. Magnetos are also used on many small airplanes (for example, the Cessna 152 seen in ) because they are extremely reliable.The idea behind any ignition system is to generate an extremely high voltage - on the order of 20,000 volts - at exactly the right time. The voltage causes a spark to jump across the spark plug's gap, and the spark ignites the fuel in the engine.

See or for details. The magneto is the white block in the following photo (this is the magneto for a ):The idea behind a magneto is simple. It is basically an electrical generator that has been tuned to create a periodic high-voltage pulse rather than continuous current.

An electrical generator (or a magneto) is the reverse of an electromagnet (see for details). In an electromagnet there is a coil of wire around an iron bar (the armature). When you apply current to the electromagnet's coil (e.g. With a battery), the coil creates a magnetic field in the armature.

In a generator, you reverse the process. You move a magnet past the armature to create electric current in the coil.A magneto consists of five parts. An armature. In the above magneto, the armature is shaped like a capital 'U'. The two ends of the U point toward the flywheel. A primary coil of perhaps 200 turns of thick wire wrapped around one leg of the U. A secondary coil of perhaps 20,000 turns of very thin wire wrapped around the primary coil.

A simple electronic control unit that commonly goes by the name 'electronic ignition' (or a set of breaker points and a capacitor). A pair of strong permanent magnets embedded in the engine's flywheel.You can see the two magnets in the following photo. When the magnets fly past the U-shaped armature, they induce a magnetic field in the armature.

This field induces some small amount of current in the primary and secondary coil. What we need, however, is extremely high voltage.

Therefore, as the magnetic field in the armature reaches its maximum, a switch in the electronic control unit opens. This switch breaks the flow of current through the primary coil and causes a voltage spike (of perhaps 200 volts). The secondary coil, having 100 times more turns than the primary coil, amplifies this voltage to approximately 20,000 volts, and this voltage feeds to the spark plug.Many riding lawn mowers do have a battery if they have accessories like headlights and electric start. Even so, the engine may use a magneto because the magneto is simple and reliable.You can learn more about magnetos from these links.

I stick the coil with hot glue on the back of the front panel, and the capacitor on the bottom of the case.I drill a hole through the top of the case and stick a piece of blue transparent plastic to see the light.I stick a piece of plastic on a side of inner space from the coil because when you push the button of the switch, the magnet or the thing you use will be throw out, depends of the size of the thing. If you are touching the thing while you push the button, you will feel the pulse passing through the thing. Stick it as good as you can, because little things like nails can detach your plastic.I stick the DPST switch and the PC power supply jack of their panel putting hot glue among them.I drill a hole through the top of the case for the push button switch.I stick of the bottom of the case four pieces of rubber which can be found on the bottom of a keyboard to increase the stability of my device. The diode D1 rectifies mains voltage and charge the capacitor via the lamp (which limit the current).The lamp glows during the capacitor's charging. The light is diminishing as the capacitor is charging. When the capacitor is charged, the lamp is off.After few seconds the capacitor is charged and the light goes off.By pushing the S2 button, a pulse of high current (aprox 50 A) passes through the coil magnetizing the object placed inside the coil.This process can be repeated.The magnetizer is simple, effective, made from salvanged parts.To understand better how it works look at the first two images, watch the video below and then view the other images.

Build A Magneto Magnetizer

You should really try it with a ferrite magnet, although I kindly doubt this setup can produce the H field required to fully magnetize it ( 900,000 A/m). Ferrite magnets are considered the easiest to magnetize among the generally available materials. There's a programm called FEMM (finite element method magnetics) which lets you simulate and calculate the minimum current, turns and solenoid size you need to produce the very strong field necessary to build a useful magnetizer that can revive ferrite magnets.

Not that this device is useless, it's really a nice proof of concept, but any small magnet can successfully magnetize an iron nail. The real deal is to remagnetize high coercivity materials such as hard ferrite such as the common C5, C8 or Y30 grades. I am still angered at how many people have negatively criticised this project.

The author is a school student and this is only his second project. We all had to start somewhere. Even if the capacitor is rated at 400V, it is never going to charge beyond the mains voltage of 220-240V. There are many un-earthed appliances that rely on plastic insulation to keep the electricity inside, among the most dangerous being hair dryers and hand-held kitchen mixers. Yet no one has mentioned just how dangerous my suggestion above would be! The capacitor, on average, is capable of holding 3kVDC maybe even as high as 5kVDC.

How To Build A Magneto Magnetizer Pdf File

It would have to remain properly housed in the modified microwave oven just in case it exploded. The button to dump the capacitor into the magnetizing coil would have to be a very heavy industrial switch-if a 'domestic' switch did not start arcing almost immediately, the contacts would probably weld together into a short circuit on its very first use. If you must 'criticise', then please use the 'be nice' policy. Why would andreyeurope want to post a third project if it was only going to attract the same negative responses? Mr Treknology, please stop trying to teach when you obviously know very little about mains AC electricity.

How To Build A Magneto Magnetizer Pdf Download

I have to be firm about this for everyone's safety, including yours. Any home-built mains powered circuit should be checked by an electrician or properly qualified person for safety BEFORE it is connected to the mains supply. On 250 Volt AC mains, the capacitor will charge to 350 Volts. A capacitor must never be charged above its rated voltage. It is liable to explode. But you are correct about the requirement for a high current switch.