LSM303D 3D Accelerometer + 3D Magnetometer Board

Name: LSM303D 3D Accelerometer + 3D Magnetometer Board
SKU: 7594
Price: 7.99 USD
Availability: OutOfStock

Explore Labs Triple-Axis Accelerometer and Magnetometer LSM303D Breakout Board 5V Ready with Voltage Regulator works with I2C and SPI.

Designed by Explore Labs in India

LSM303D 3D Accelerometer + 3D Magnetometer Board 1

LSM303D 3D Accelerometer + 3D Magnetometer Board 2

LSM303D 3D Accelerometer + 3D Magnetometer Board 3

LSM303D 3D Accelerometer + 3D Magnetometer Board 4

$7.99

Out of Stock

Sold out since Mar 24, 2017

Explore Labs Triple-Axis Accelerometer and Magnetometer LSM303D Breakout Board 5V Ready with Voltage Regulator works with I2C and SPI.

The LSM303D is a system-in-package featuring a 3D digital linear acceleration sensor and a 3D digital magnetic sensor. The LSM303D has linear acceleration full scales of ±2g / ±4g / ±6g / ±8g / ±16g …

The LSM303D includes an I2C serial bus interface that supports standard and fast mode (100 kHz and 400 kHz) and SPI serial standard interface. The system can be configured to generate an interrupt signal for free-fall, motion detection and magnetic field detection. Thresholds and timing of interrupt generators are programmable by the end user. Magnetic and accelerometer blocks can be enabled or put into power-down mode separately.

The carrier board includes a low-dropout linear voltage regulator that provides the 3.3 V required by the LSM303D, which allows the sensor to be powered from 2.5 V to 5.5 V. The regulator output is available on the 3Vo pin which can supply approx. 150 mA to external devices.

The breakout board also includes a circuit that shifts the two I2C lines or all four SPI lines (clock, data-in/out and chip select) to the same logic voltage level as the supplied VIN, making it simple to interface the board with 5V systems; and the board’s 0.1″ pin spacing makes it easy to use with standard solderless breadboards and 0.1″ perfboards. The board ships fully populated with its SMD components, including the LSM303D, as shown in the product picture.

Features of Explore Labs 3D Accelerometer + 3D Magnetometer LSM303D Compass Breakout Board:

Wide supply voltage - 2.5V to 5V
Level shifted IO lines for easy interfacing to high voltage boards like Arduino Uno, Mega, Leonardo, etc.
All pins of the LSM303D sensor are available like I2C and SPI communication interfaces as well as INT1 and INT2 Interrupt pins
Layout takes care of keeping the area below the sensor free from any active current carrying trace or a power or ground plane
Capacitors with low ESR characteristics are used for decoupling on both VDD and VDDIO power inputs
Open Source Hardware
Designed, Assembled and Made in India

Features of LSM303D Sensor IC:

3 magnetic field channels and 3 acceleration channels
±2/±4/±8/±12 gauss magnetic full scale
±2/±4/±6/±8/±16 g linear acceleration full scale
16-bit data output
SPI / I2C serial interfaces
Power-down mode / low-power mode
Extended operating temperature range (from -40 °C to 85 °C)
Programmable interrupt generators for free-fall, motion detection and magnetic field detection
Embedded temperature sensor
Embedded FIFO

Specifications:

Input Voltage: 2.5V to 5V
5V Ready IOs: Level shifted IO lines for easy interfacing to incompatible voltage boards
Digital Output: Inter Integrated Circuit (I2C/IIC) or Serial Peripheral Interface (SPI)
Regulator Pin - Provides 3.3V Out at 150mA (when 3.6V < VIN < 5V) else provides voltage ~equal to VIN
Dimensions: 20.4 mm x 20 mm
Weight: 3 grams

Applications:

Tilt-compensated compasses
Map rotation
Position detection
Motion-activated functions
Free-fall detection
Click/double-click recognition
Pedometers
Intelligent power saving for handheld devices
Display orientation
Gaming and virtual reality input devices
Impact recognition and logging
Vibration monitoring and compensation

Output Format: Values are expressed in 16-bits as two’s complement for each axis. As shown in the example codes below, knowing the sensitivites of the device, one can easily find out the acceleration value in g (acceleration due to gravity - m/s2) and magnetic field intensity in gauss. These readings may be used separately or together to create a tilt-compensated compass or other complex orientation calculations for Inertial Measurement Units (IMU).

Connections: Connections with various development boards are explained below:

The carrier board supports both I2C as well as SPI method of communication with a host microcontroller. The communication mode is selected by pulling the CS pin HIGH or LOW. By default, the CS pin is pulled HIGH through a 4.7 kΩ resistor on the board. This makes I2C communication the default method to talk to this carrier board.

I2C Communication: By default, I2C communication is implemented. The Explore Labs 3D Accelerometer + 3D Magnetometer LSM303D Compass Breakout Board can be configured and its angular velocity readings can be queried through the I2C bus. Level shifters on the I2C clock (SCL) and data (SDA) lines enable I2C communication with microcontrollers operating at the same voltage as VIN (2.5V to 5V). A detailed explanation of the I2C interface on the LSM303D can be found in its datasheet[1] and more detailed information about I2C Protocol in general can be found in NXP’s I2C-bus specification manual.

I2C Address: In I2C mode, the device’s 7-bit slave address has its least significant bit (LSb) determined by the voltage on the SDO/ADR pin. The carrier board pulls SDO/ADR HIGH through a 4.7 kΩ resistor, making the LSb 1 and setting the slave address to 0011101b (0x1D). This is the default device address in I2C mode. If SDO/ADR pin is connected to ground, LSb value is ‘0’ which changes the device address to 0011110b (0x1E). This solution permits the connection and addressing of two different accelerometers to the same I2C lines.

Arduino Uno with I2C Interface

Sensor VIN - Arduino Uno 5V
Sensor GND - Arduino Uno GND
Sensor SDI/SDA - Arduino Uno Analog Input Pin A4 or SDA
Sensor SCK/SCL - Arduino Uno Analog Input Pin A5 or SCL

Raspberry Pi (all models) with I2C Interface

Sensor VIN - Raspberry Pi 3.3V on Pin 1 or 17
Sensor GND - Raspberry Pi GND
Sensor SDI/SDA - Raspberry Pi SDA1 (I2C) on Pin 3 or GPIO2
Sensor SCK/SCL - Raspberry Pi SCL1 (I2C) on Pin 5 or GPIO3

BeagleBone Black with I2C Interface

Sensor VIN - BeagleBone Black 3.3V
Sensor GND - BeagleBone Black GND
Sensor SDI/SDA - BeagleBone Black I2C2_SDA (Pin 20) on Header P9
Sensor SCK/SCL - BeagleBone Black I2C2_SCL (Pin 19) on Header P9

SPI Communication: To use the LSM303D in SPI mode, CS pin must be driven low (connected to GND). A minimum of four logic connections are used viz., SDI, SCK, SDO and CS. These should be connected to an SPI bus operating at the same logic level as VIN. The SPI interface operates in 4-wire mode by default, with SDI and SDO on separate pins. In the default 4-wire mode, the sensor transmits data to the SPI master on a dedicated data out (SDO) line. If the SPI interface is configured to use 3-wire mode instead, the SDI line doubles as SDO and is driven by the LSM303D when it transmits data to the master. A detailed explanation of the SPI interface on the LSM303D can be found in its datasheet[1].

Arduino Uno with Serial Peripheral Interface (SPI)

Sensor VIN - Arduino Uno 5V
Sensor GND - Arduino Uno GND
Sensor SDI/SDA - Arduino Uno Digital Pin 11 or MOSI (Master Out Slave In)
Sensor SCK/SCL - Arduino Uno Digital Pin 13 or SCK (Serial Clock)
Sensor SDO/ADR - Arduino Uno Digital Pin 12 or MISO (Master In Slave Out)
Sensor CS - Arduino Uno Digital Pin 10 or SS (Slave Select or Chip Select)