YS-27 Hall Speed Counting Detection Sensor
YS-27 Hall Speed Counting Detection Sensor can be used to detect the number of revolutions per minute on the engines, to detect whether a door is closed or not, or to others in your creative projects.
This module contains an integrated LM393 comparator circuit to generate a digital output rather than an analog output. The reference voltage for the module can be set by a potentiometer.
This module also has a mounting hole.