Stepper motors are a type of brushless DC motor that can be controlled so that they advance a fixed step size. Additionally, they provide a strong holding torque. This can make them useful in applications where you want to rotate the motor precisely without employing encoders. When prototyping, I...

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You need to implement a comparator circuit with hysteresis, and you pull up some app notes. They look something like this, credit to Analog Devices:

comparator schematics

If you have a circuit in hand, there are a dozen or so discussions online to determine the comparator’s characteristics: high threshold $V_{TH}...

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