8 Summary

This application note covered the process for designing a trigger with Hall-effect sensors. This process started with covering the mechanical implementation of the trigger and progressed through selecting a device based upon calculations performed in TI's Magnetic Sensing Proximity Tool, and concluded with some post-processing techniques to map device output voltage into angle. After the preliminary theoretical design process, prototyping and bench measurement were discussed. One key insight is that there are potentially many different methods to each step of the design, whether it is the mechanical operation, the magnet and sensor pairing, relative placement, or post-processing technique. The second key insight is that there are tools that can be leveraged so that calculation for the various stages can be done expeditiously. The third critical insight is that prototyping is crucial after some rigorous simulation sweeps to better understand errors and possible manufacturing limitations.