SLYA058 June   2022 DRV5021 , DRV5032 , DRV5033 , TMAG5123 , TMAG5124 , TMAG5170 , TMAG5273 , TMAG5328


  1.   Abstract
  2.   Trademarks
  3. 1Hall-Effect Sensors in Smart Locks
    1. 1.1 Tamper Detection
  4. 2Methods for Hall-Effect Based Rotational Position Sensing
    1. 2.1 Switch Implementation
    2. 2.2 Rotational Sensing With 3D Hall-Effect Sensors
  5. 3Summary
  6. 4References


Using Hall-effect sensors to determine the position of a deadbolt in an electronic smart lock can be done in two main ways. A switched implementation provides a lower power consumption per device while the 3D Hall sensor provides additional information on the position of the deadbolt. The tolerances of the design can also be varied as needed by selecting different magnets or sensors.