The analog output from the 49E feeds into one input of the LM393 comparator. The other input receives a reference voltage derived from the onboard potentiometer.
| Feature | YL-105 (Superheterodyne) | XY-MK-5V (Superregenerative) | | :--- | :--- | :--- | | | Low | High | | Stability | High | Low (drifts with temp) | | Price | Slightly Higher | Very Low | | Range | Better | Average | yl-105 datasheet
By turning the potentiometer, you set the reference voltage. When the Hall sensor’s output exceeds this reference, the comparator’s output toggles. This allows you to adjust the magnetic threshold distance. The analog output from the 49E feeds into