Hall element is a magnetic sensitive element. If you want to use it to measure the rotational speed, you must install a magnet on the rotating body to be measured. When rotating, as long as the magnet passes through the Hall element, the Hall element will send out a signal and get a pulse signal after amplification and shaping. Some Hall elements can directly output pulse signals and send them to run. The interval between two pulses is the period, and the rotation speed can be converted from the period. You can also count the number of pulses per unit time and then convert the speed.

There are many Hall elements that can be measured, such as A3 144, AH04E and AH44E, which are about the size of an in-line triode and encapsulated in TO92.

Please add QQ:1621324135 for details. Shenzhen Kaixiang Technology Co., Ltd. mainly sells Hall components.