TIDUBY9 December 2021
This reference design uses Hall-effect sensors to implement a trigger that outputs a varying voltage based on how far the trigger is pressed. These types of triggers are well-suited for use in cordless power tools or any other end equipment that utilize trigger displacement information. The design uses a contactless approach that reduces wear and tear compared to traditional mechanical-based triggers, thereby increasing product lifetime. Low-power Hall-effect switches are used along with a load switch to keep the system in a low-power standby mode when the trigger is not pressed. In addition, an optional magnetic field protection feature is available that disables the voltage output when a strong, external magnetic field is present.