In general, you can have a look at this application note here www.melexis.com/en/documents/documentation/application-notes/application-note-how-to-use-a-magnetometer-in-a-position-sensor-application or see for more specific application note on a product page like the www.melexis.com/MLX90394.

The sensor bandwidth is not compatible with BLDC motor speed unless measuring after gear reduction. For angle calculation, it is taking the ratio of the two relevant axes that generate sine and cosine signals as a function of rotation, and then make the arctangent of the division to get the angle alpha. So, alpha equals atan2(Bx/By) in case the rotation axis is perpendicular to the sensor surface. Hope this helps.

The MLX90393 is capable of measuring at a 1ms (1kHz) rate. Therefore we would expect that the 10Hz magnet vibration could be measured, depending on the amount of magnetic field change. Very small vibrations may be difficult to detect as the magnetic field change may be very small.

Hi Sasha, the schematic is not available; however, it is effectively an LPC1768 microcontroller interfacing with a series of 24 WS2812B RGB LEDs and the Melexis MLX90393 over SPI. This allows us to reuse the code we developed during prototyping on the mbed platform. If you recreate this you should note that the microcontroller uses 3.3V while the LEDs use 5V (from the USB port). We found that you need to have an open-drain output on the LPC1768 and a pull-up to 5V to make sure the LED logic threshold is met. Using a push-pull to 3.3V meant that sometimes the LEDs would work, sometimes not, which was due to the variability of the logic high voltage threshold on the first LED in the series. You can find more information about the MLX90393 magnetic sensor on our website (see www.melexis.com/MLX90393), along with a getting started guide that includes some pseudo-code examples and library for the mbed platform. We hope this helps.

Yes, you can use it with an Arduino. We have many customers doing so and have example code in the getting started guide (for the Mbed platform) which can be used as a starting point for Arduino. Please find the link to download the MLX90393 getting started guide: www.melexis.com/en/documents/documentation/application-notes/application-note-mlx90393-getting-started-guide

Sir, im facing trouble.. cant able to find a diametral magnet which suits for yours MLX90393 here @ india..do you havr any sellers or distributors here @ india...plz help 2. Is it mandatory that i meed to only use diametral magnets.. for linear sensing, can i use linear pole magnetic strip...??

No sounds are produced. The MLX90393 does sense the field generated by a magnet and therefore detects its position.

money

Hi Rachel, the demonstrator is showing a possibility of using magnetic sensors to detect rotary and push/pull motion. To visualize this in a clear manner the LEDs are used to show the rotary position as well as changing color when the knob is pushed. As the sensor outputs SPI or I2C data it can be interfaced with a microcontroller to work in a variety of applications including, for example, smart light controls that implement power (on/off), brightness, and color control. The MLX90393 magnetic sensor can also be used to make HMI devices like linear sliders or joysticks. You can find more information about the MLX90393 sensor on our website: www.melexis.com/MLX90393

Are you a total idiot? Its hall sensor with accompanied circuitry for the leds !!!