This repository contains code samples for the MPS MagAlpha position sensor family.

All code samples are released under the MIT License.

We currently have code examples for the following hardware platforms:

• Arduino (works best with the following 3.3V boards)
  • Arduino ZERO (use SPI connector and USB programming port)
  • Arduino MKRZero
  • Adafruit Feather M0 Basic Proto (should also works with other feather M0 boards)
  • Arduino 101 (not tested)
  • Arduino Due (use SPI connector and USB programming port)
• Adafruit FT232H Breakout (use Python)
• STM32 32-bit Arm Cortex MCUs. More info here.
  • STM32F303RE tested on board NUCLEO-F303RE.

MagAlpha sensor family is based on Hall devices that are directly integrated with the signal treatment. These sensors are extremely compact and can instantaneously detects and delivers the angle value in digital format.

More information can be found on the MPS website or directly on the Position Sensors Design Support page.

The MagAlpha sensor family offer a robust contactless angle encoder suitable for control buttons and knobs. The IC detects the absolute angular position of a permanent magnet, typically a diametrically magnetized cylinder attached to the rotor. The PWM digital output can be filtered to obtain an analog signal.

A MagAlpha sensor can replace a 3 Hall switch solution (UVW) or an incremental optical encoder (ABZ, ABI) for a fraction of the initial cost. Making it a perfect fit for Brushless DC motors (BLDC). Thanks to its extremely fast acquisition time, the MagAlpha can be used at speeds from 0 to 120'000 RPM.

The MagAlpha digital interface can be connected to any microcontroller having a SPI interface. It is extremely easy to monitor the angular position and configure sensor parameters such as the zero settings and the bias current trimming (BCT)