Hall sensor module schematics?

Discussion in 'General Electronics Chat' started by Chupo_cro, Jan 14, 2013.

  1. Chupo_cro

    Thread Starter Member

    Nov 9, 2008
    I am considering using this Hall sensor switch module (if the server is down - the module is exactly the same as this one) but am not quite sure if I understand how the sensitivity could be adjusted using this switched Hall-effect sensor IC (OH3144), so I'd like to see the schematics to see how it works.

    As I understand, OH3144 Hall sensor already has digital output so I wonder why to use LM393 voltage comparator and how the sensitivity is adjusted with the trimmer resistor. I'd use the comparator if the output from the sensor would have been analog, but it is not :-/