EYE on NPI – Melexis MLX90395 High-Range Magnetic Field Sensor #EyeOnNPI @Melexis_Sensors @DigiKey @Adafruit

This weeks EYE on NPI is a sensor with a magnetic personality and we’re really attracted to it…You guessed it – we’re looking at the latest 3D magnetic field sensors from Melexis, the MLX90395.

These are some of the few high-magnetic-field sensors available, with up to +-120mT, that’s 1200 Gauss! Incredible when you consider many of our common magnetometers for IMU usage top out at +-50 Gauss. The sensor also has high precision, with 16-bit output and built in over-sampling since magnetometers can be a little noisy.

This sensor isn’t great for IMU usage — you’ll want to stick to ~1 Gauss ranges for detecting Earth-level fields. But it is excellent for magnetic field sensing such as that of a rare earth magnet.

These chips are often used for 3D motion sensing of an object, when it has a magnet embedded in it. Especially joysticks and other user controls, you get the environmental robustness of optical with the cost of mechanical. Plus you get Z axis motion, which optical doesn’t like as much. With a little bit of math you can detect various motions, positions, twists and distances, all without any mechanical wear.

The sensor is available in both 50 and 120mT ranges, and in a few packages. We happen to like the QFN because it’s pin-compatible with the earlier MLX90393. Note that it is not code-compatible with the ‘393.

For interfacing you can use I2C or SPI, with free-running or one-shot modes. There’s an interrupt pin for data ready checking, and a trigger pin if you want to trigger readings with GPIO rather than requesting over I2C/SPI.

We whipped up a driver over the weekend for people to use to get readings with an over-sample filter to help smooth out the readings.

It’s great to see revisions of sensors come out that give us better accuracy and precision, with wider ranges and lower prices and the MLX90395 does not disappoint. When ordering, check the last few digits of the product order code since there are two versions. The -10x series is 120mT and the -00x series is 50mT, you’ll get a trade-off of precision and range.

Digi-Key has these in stock right now in a variety of packages from SOIC to QFN to TSSOP and ready to ship today for delivery tomorrow morning. Also via short URL https://www.digikey.com/short/znjjrv

See more from the manufacturer video below:


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 27,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


Maker Business — To make it through a tough business cycle, layoffs should be a last resort

Wearables — EVA foam is like fondant

Electronics — I touched my circuit, and now it glitches!

Python for Microcontrollers — Python on Microcontrollers Newsletter: 300 CircuitPython Libraries, Python Turns 30! #Python #Adafruit #CircuitPython @micropython @ThePSF

Adafruit IoT Monthly — OpenCV Critter Cam, LoraWAN on Raspberry Pi 2040, and more!

Microsoft MakeCode — MakeCode Arcade Turns One!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — New Products 2/24/2021 Feat. TPS62827 3.3V Buck Converter Breakout – 3.3V Output 2 Amp Max!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.