SLYA063A august   2022  – may 2023 DRV5032 , TMAG5131-Q1 , TMAG5170 , TMAG5170-Q1 , TMAG5170D-Q1 , TMAG5173-Q1 , TMAG5273

 

  1.   Abstract
  2. 1Problems With Mechanical Knobs and Rotary Encoders
  3. 2Hall-Effect Sensors for Rotational Sensing
  4. 3Design Considerations for Magnetic Dials
  5. 4Conclusion
  6. 5Reference

4 Conclusion

Designing a Hall-effect dial takes consideration to properly choose the magnet and sensor but eliminates a point-of-failure due to mechanical wear and tear. The reduction in potential failure points can be an essential improvement in applications such as a volume knob in an automotive center console or a selection dial on an appliance, since these products are difficult or costly to repair. Many magnet suppliers have tools for determining the magnet strength, which is used to determine the proper Hall-effect sensor.