Hall sensor in simple words with practice

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ElectronicsClub

Published on May 6, 2022
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A Hall sensor is a semiconductor plate with current placed in a magnetic field. The Hall effect is as follows: if you take a plate with electric current flowing through it and place it in a magnetic field so that the magnetic field lines intersect the plate perpendicularly, a potential difference will arise at the edges of the plate - voltage, which is also called the Hall voltage. It should be noted that most common Hall sensors respond to a relatively strong magnetic field, which can be a permanent magnet, for example, a neodymium magnet. Hall sensors are unipolar, bipolar, with a latch, without a latch, with an analog output, with a digital output. Since electric current generates a magnetic field, then by measuring its magnitude, you can indirectly measure the current. Current clamps are used to perform such measurements. They are a magnetic circuit in the cut of which the Hall sensor is installed. The magnetic circuit is made in the form of an open structure, which allows you to measure the current without breaking the electrical circuit. If you install a magnet on a bar and fix it on the engine shaft, you can use the Hall sensor to determine the engine shaft speed and then build a tachometer, odometer, etc. or automate any process. #Hall sensor #magnet # electronicsclub

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