10
Lesson 1 Hall Sensor
Introduction
Based on the Hall Effect, a hall sensor is one that varies its output voltage in response to a
magnetic field. Hall sensors are used for proximity switching, positioning, speed detection,
and current sensing applications.
Hall sensors can be categorized into linear (analog) Hall sensors and switch Hall sensors. A
switch Hall sensor consists of voltage regulator, Hall element, differential amplifier, Schmitt
trigger, and output terminal and it outputs digital values. A linear Hall sensor consists of a Hall
element, linear amplifier, and emitter follower and it outputs analog values.
There are three types of hall sensor module in this kit (as shown below): linear Hall sensor (in
two forms) which outputs analog signals, and switch Hall sensor which outputs digital signals.
If you add a comparator to the linear Hall sensor, it will be able to output both analog and
digital signals.
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