How to make a compass
The method of making a compass is as follows:
Tool materials: paper clips, waste bottle caps, pliers, strong magnets (can be removed from used speakers), glue, scissors, markers.
Production steps:
1. Use pliers to straighten an ordinary stationery paper clip and cut it to the appropriate length.
2. Place the straightened paper clip on one pole of the magnet and rub it in the same direction more than 20 times. Be careful not to prick your hand with the tip of the needle. One of the easiest ways to check whether a magnetic needle is ready is to place it next to another finished compass and check whether the compass pointer deflects due to the proximity of the magnetic needle.
3. Use a marker pen to paint one end of the magnetized pointer black, punch two opposite small holes on the side of the beverage bottle cap, and insert the magnetized pointer into the hole cover.
4. Use glue to stick the pointer on the bottle cap, and a simple floating compass is ready.
To use this DIY compass, just place it on still water and, attracted by the earth's magnetic poles, the compass will slowly rotate on the water until it points you to the correct north-south direction.
The compass, called Sinan in ancient times, its main component is a magnetic needle mounted on a shaft. The magnetic needle can rotate freely under the action of the natural geomagnetic field and remain in the tangent direction of the magnetic meridian. The south pole of the magnetic needle Pointing to the geographical south pole (magnetic north pole), you can use this performance to identify the direction.
Commonly used in navigation, geodesy, travel and military. The invention of the compass that physically indicates direction has three types of components, namely the compass, the compass and the magnetic needle, all of which are Chinese inventions. According to the "Ancient Mine Records", it first appeared in the Cishan area during the Warring States Period.
The compass is the result of ancient Chinese working people’s understanding of the magnetism of magnets through long-term practice. As one of the four great inventions in ancient China, its invention played an immeasurable role in the development of human science, technology and civilization. In ancient China, the compass was first used to determine directions in sacrifices, etiquette, military affairs, divination and Feng Shui.