When making a homemade compass from a magnetized sewing needle, you will conduct an entertaining scientific experiment, but in addition it is a useful navigation tool. Like all such very necessary tools, such a homemade compass is made from materials that can be obtained from many available sources.
How to make a homemade compass from a magnetized sewing needle, magnetizing a sewing needle for a homemade compass.
You will find electric wires in radio speakers, flashlights and in the car. Batteries are used in a wide variety of devices. A roll of scotch tape is a must-have emergency vehicle. But to get a needle or a thin long steel arrow, if you did not put it in your supply, you will have to try.
With a few simple steps, you can magnetize a steel needle or a piece of steel wire from the fence and use it just like a regular compass bought in a store, whose operation is based on the fact that under the influence of the Earth’s magnetic field, or “magnetosphere”, the magnetized arrow is set in a certain direction.
1. Strip a piece of insulated wire on both sides.
2. Wrap the steel sewing needle with this wire..
3. Connect the bare ends of the wire for a few seconds to the battery.
4. Place the needle on a leaf of a plant or on a piece of cork.
5. Lower the needle into a puddle of water or a container of water.
An electric charge causes the ions to collect at one end of the needle sewing needle. And if nothing prevents her, she will automatically point to the north – south. There is, however, one difference between a sewing needle bought in a store and a homemade compass from a sewing needle. If the arrows are correctly magnetized at the factory compass, one of the arrows points to the south, the other to the north.
Magnetizing a sewing needle for a homemade compass.
Ideally, you may decide that you need to magnetize only one end of the needle, but it is difficult to work with such a small and thin device. Therefore, use the needle as a source of only the most general information to find an axis showing north and south. To determine where each end is directed, you will need to use some other kind of orientation for natural objects..
The north direction of the compass actually shows the Earth’s north magnetic pole. It is located about 2000 kilometers south of the true north – the geographic North Pole of the Earth. Therefore, the readings of improvised compasses should be supplemented, when possible, with maps. Since once they give a complete picture of the direction of movement.
Based on the book Survival in the Wild and Extreme Situations. 100 key skills in the special services methodology.