User Manual

12/16/13 10DOF L3G4200D/ADXL345/HMC5883L/BMP085 sensor breakout - Geeetech Wiki
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Features
Tiny!
ADXL345 accelerometer
L3G4200D gyro
HMC5883L magnetometer
BMP085 barometric pressure sensor
5V input
I2C interface
Details
The ADXL345 is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement at up to
+-16 g. Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4-
wire) or I2C digital interface. The ADXL345 is well suited to measures the static acceleration of gravity in tilt-
sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (4 mg/LSB)
enables measurement of inclination changes less than 1.0 degrees;
The L3G4200D is a low-power three-axis angular rate sensor able to provide unprecedented stablility of zero rate
level and sensitivity over temperature and time. It includes a sensing element and an IC interface capable of
providing the measured angular rate to the external world through a digital interface (I2C/SPI).The sensing element
is manufactured using a dedicated micro-machining process developed by STMicroelectronics to produce inertial
sensors and actuators on silicon wafers.The IC interface is manufactured using a CMOS process that allows a high
level of integration to design a dedicated circuit which is trimmed to better match the sensing element
characteristics.The L3G4200D has a full scale of ±250/±500/±2000 dps and is capable of measuring rates with a
user-selectable bandwidth.
The Honeywell HMC5883L is a surface-mount, multi-chip module designed for low-field magnetic sensing with a
digital interface for applications such as low-cost compassing and magnetometry. The HMC5883L includes our
state-of-the-art, high-resolution HMC118X series magneto-resistive sensors plus an ASIC containing amplification,
automatic degaussing strap drivers, offset cancellation, and a 12-bit ADC that enables 1° to 2° compass heading
accuracy. The I2C serial bus allows for easy interface. These anisotropic, directional sensors feature precision in-
axis sensitivity and linearity. Honeywell’s Magnetic Sensors are among the most sensitive and reliable low-field
sensors in the industry.
The BMP085 is a high-precision, ultra-low power barometric pressure sensor for use in advanced mobile
applications. It offers superior performance with an absolute accuracy of down to 0.03 hPa and using very low
power consumption down to 3 μA.The BMP085 comes in an ultra-thin, robust 8-pin ceramic lead-less chip carrier
(LCC) package, designed to be connected directly to a micro-controller of a mobile device via the I2C bus.
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