Principle of Hall sensor 49E

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Principle of Hall sensor 49E [Copy link]

The Hall sensor 49E has the words facing us. The three pins from left to right are the power pin Vcc, ground gnd, and output pin out. Now power the power and gnd, and solder a light-emitting diode between out and gnd. When a magnet is used to control the approach to the out pin, the light-emitting diode gradually becomes brighter, and the light-emitting diode gradually becomes darker. The principle analysis of this phenomenon is as follows:

When only 49E is powered, the magnet is not close, no magnetic field is established inside the Hall sensor, and the high-resistance between the out and gnd pins is in the off state, and the LED is not lit;

When a magnet approaches, the moving charges inside the Hall sensor establish a Hall voltage under the force of the magnetic field, and a voltage is established between out and gnd, causing the light-emitting diode to turn on.

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2024-8-12 21:46 上传

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qwqwqw2088

When the magnet approaches, the output of the Hall sensor should make the LED gradually brighter , not darker.

Gen_X

Excessive popularization of science - the "principle" is actually "far away"!

There are no errors in the text, which is understandable because it is common when typing on the Internet. But there is indeed no discussion of the "principle".