Rotating bezel timer watch with magnetic sensing

A wristwatch timer system, comprising:

• a watch case housing a clock mechanism;
• a rotating bezel mounted on the watch case and including a bezel magnet;
• a minute hand driven by the clock mechanism and including a minute hand magnet;
• a flexible printed circuit board positioned within the watch case and comprising a plurality of sensors arranged around a dial in a circular pattern;
• a microcontroller circuit including a multiplexer and analog-to-digital converter for sequential activation of the hall-effect sensors;
• and
• a piezoelectric buzzer configured to generate an audible alert when the minute hand magnet aligns with the bezel magnet.

A magnetic sensing watch, comprising:

• a rotatable bezel with an embedded magnet positioned at a reference location;
• a timekeeping mechanism including a minute hand with an integrated magnet;
• a hall-effect sensor array positioned to detect magnetic field variations from both the bezel magnet and the minute hand magnet;
• a low-power microcontroller configured to process sensor data and determine relative magnetic positions;
• and
• an actuator system configured to provide notification when a predetermined alignment condition is detected between the bezel magnet and the minute hand magnet.