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In recent years, new ways of using magnetism to become oriented have emerged. Magnetometers based on three magnetic probes, such as Hall ef- fect sensors, and processing chips con- stitute solid-state compasses, which are embedded in the smartphones that millions of us use every day. And still the old, simple, and cheap magnetic- needle compass remains in use in a large number of applications, e.g., sport orienteering.

Figure 5 In recent years, new ways of using magnetism to become oriented have emerged. Magnetometers based on three magnetic probes, such as Hall ef- fect sensors, and processing chips con- stitute solid-state compasses, which are embedded in the smartphones that millions of us use every day. And still the old, simple, and cheap magnetic- needle compass remains in use in a large number of applications, e.g., sport orienteering.

Related Figures (4)

FIGURE 1 - An early Chinese magnetic compass made of a spoon-shaped loadstone on a flat surface, circa 70-80 CE. (Photo courtesy of Wikimedia Commons.) In the eighth century CE, Islam spread over a large part of the known world, westward as far as the Atlantic shore of Northern Africa, northward toward southern Europe, and eastward deep into central Asia. Here, in 751, the Arab Abbasid knights clashed with the
FIGURE 1 - An early Chinese magnetic compass made of a spoon-shaped loadstone on a flat surface, circa 70-80 CE. (Photo courtesy of Wikimedia Commons.) In the eighth century CE, Islam spread over a large part of the known world, westward as far as the Atlantic shore of Northern Africa, northward toward southern Europe, and eastward deep into central Asia. Here, in 751, the Arab Abbasid knights clashed with the
FIGURE 2 — A perfected compass of the 16th century, enclosed in a protective boxwood box. (Photo courtesy of Wikimedia Commons.)
FIGURE 2 — A perfected compass of the 16th century, enclosed in a protective boxwood box. (Photo courtesy of Wikimedia Commons.)
FIGURE 3 — A map of the Atlantic Ocean with isogonic lines (i.e., lines with equal declination) from Edmund Halley's General Chart of the Variation of the Compass, 1701. (Photo courtesy of Wikimedia Commons.)
FIGURE 3 — A map of the Atlantic Ocean with isogonic lines (i.e., lines with equal declination) from Edmund Halley's General Chart of the Variation of the Compass, 1701. (Photo courtesy of Wikimedia Commons.)
FIGURE 4 - Hans Christian @rsted’s experiment in 1820 revealing the interaction between the magnetic compass and the electric current. (Photo courtesy of Wikimedia Commons.)
FIGURE 4 - Hans Christian @rsted’s experiment in 1820 revealing the interaction between the magnetic compass and the electric current. (Photo courtesy of Wikimedia Commons.)
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EngineeringHistoryComputer ScienceManufacturing EngineeringMagnetic LevitationElectrical and Electronic Engineering
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