While the TMAG5253 is available in either unipolar or bipolar configurations, the device featured in this EVM is a bipolar ratiometric device. The device output is an analog signal proportional to the field detected by the sensor. The output is routed to a header pin as well as a via which a test point or wire can be inserted into for inspection with an external voltmeter, oscilloscope, or microcontroller. The output is also routed to an onboard microcontroller that processes the analog potential and generates a PWM signal that can dim an RGB LED indicator to provide visual feedback to the user. If no LED light is on, the device is either disabled or there is little to no field measured. As in Figure 3-3, a bright red LED light indicates that the north pole is facing the top of the device sensing element, while a bright blue LED light, as in Figure 3-4, indicates that the south pole is facing the top of the device sensing element. When the board is inserted into the 3D attachment with the magnet installed, a little less than 50% of the analog output range will be observed over the trigger's range of motion according to the magnetic polarity facing the device.

Figure 3-3 Red LED Operation

Figure 3-4 Blue LED Operation