![]() ![]() One half of the device takes care of all-things gyroscope and accelerometer, and the other half manages solely the magnetometer. The LSM9DS1 is, in a sense, two IC's smashed into one package - like if you combined an LSM6DS3 accel/gryo with an LSM303DLMTR accel/mag. Note that, according to the datasheet, the x and y axes of the magnetic sensor are flipped (the image above is copied from the datasheet). ![]() The LSM9DS1 Breakout has labels indicating the accelerometer and gyroscope axis orientations, which share a right-hand rule relationship with each other. That means it produces nine pieces of data: acceleration in x/y/z, angular rotation in x/y/z, and magnetic force in x/y/z. The LSM9DS1 measures each of these movement properties in three dimensions. Note the IC's polarity-marking dot (for some reason they rotated the magnetometer in the datasheet). Quadcopters with built-in gyroscopes can look out for sudden rolls or pitches, and correct their momentum before things get out of hand.Īxis orientations of the LSM9DS1 IC. An accelerometer in your phone can measure the direction of the force of gravity, and estimate orientation (portrait, landscape, flat, etc.). Measuring the force and direction of Earth's magnetic field with a magnetometer, you can approximate your heading. 9DOF's have tons and tons of applications. The LSM9DS1 measures magnetic fields in units of gauss (Gs), and can set its measurement scale to either ± 4, 8, 12, or 16 Gs.īy measuring these three properties, you can gain a great deal of knowledge about an object's movement and orientation. Though they're not easily visible, magnetic fields exist all around us - whether you're holding a tiny ferromagnet or feeling an attraction to Earth's magnetic field. The LSM9DS1 measures its acceleration in g's, and its scale can be set to either ± 2, 4, 8, or 16 g.įinally, there's the magnetometer, which measures the power and direction of magnetic fields. If an object is sitting motionless it feels about 1 g of acceleration towards the ground (assuming that ground is on earth, and the object is near sea-level). The LSM9DS1 can measure up to ± 2000 DPS, though that scale can also be set to either 245 or 500 DPS to get a finer resolution.Īn accelerometer measures acceleration, which indicates how fast velocity is changing - "how fast am I speeding up or slowing down?" Acceleration is usually either measured in m/s 2 (meters per second per second) or g's (gravities ). The gyroscope can measure angular velocity - that is "how fast, and along which axis, am I rotating?" Angular velocities are measured in degrees per second - usually abbreviated to DPS or °/s. The LSM9DS1 is one of only a handful of IC's that can measure three key properties of movement - angular velocity, acceleration, and heading - in a single IC. To follow along, you'll need the following materials: ![]() This tutorial explains how to use the LSM9DS1 Breakout Board with an Arduino. Using the Arduino Library - An overview of the SFE_LSM9DS1 Arduino library's functions and variables.Instlaling the Arduino Library - How to install the Arduino library, and use a simple example sketch to verify that your hookup works.Hardware Hookup - Example I 2C and SPI wiring diagrams.Hardware Assembly - Assembly tips and tricks, plus some information about the breakout's dimensions. ![]() Breakout Board Overview - This page examines the LSM9DS1 Breakout Board - topics like the pinout, jumpers, and schematic are covered.LSM9DS1 Overview - An overview of the LSM9DS1, examining its features and capabilities.The tutorial is split into the following pages: Then we'll switch over to example code, and show you how to interface with the board using an Arduino and our LSM9DS1 Arduino library. We'll introduce you to the chip itself, then the breakout board. This tutorial is devoted to all things LSM9DS1. The LSM9DS1 is equipped with a digital interface, but even that is flexible: it supports both I 2C and SPI, so you'll be hard-pressed to find a microcontroller it doesn't work with. ![]()
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