GY-801 10DOF 9-Axis Attitude L3G4200D ADXL345 HMC5883L BMP085 Module

Description

Product Overview

The GY-801 10DOF IMU Module is a comprehensive 9-axis motion tracking board that integrates five high-performance sensors on a single compact PCB. It combines a 3-axis gyroscope, a 3-axis accelerometer, a 3-axis magnetometer, and a barometric pressure sensor, providing a complete solution for applications requiring orientation sensing, motion tracking, and altitude measurement .

“10DOF” (Degrees of Freedom) refers to the combined sensing capabilities of the module:

• 3 axes of angular velocity (gyroscope)

• 3 axes of linear acceleration (accelerometer)

• 3 axes of magnetic field (magnetometer/compass)

• 1 barometric pressure channel (altitude)

This module is widely used in drones (UAVs), robotics, virtual reality systems, gaming controllers, GPS navigation systems, and inertial measurement units (IMUs). All sensors communicate via the I2C protocol, requiring only 2 data lines (SDA and SCL) to connect to your microcontroller .

Sensor Components

L3G4200D – 3‑Axis Gyroscope

• Measures angular velocity (rate of rotation) around X, Y, and Z axes

• User‑selectable full scales: ±250, ±500, or ±2000 degrees per second (dps)

• 16‑bit digital output with built‑in temperature sensor for drift compensation 

ADXL345 – 3‑Axis Accelerometer

• Measures linear acceleration (including gravity) on X, Y, and Z axes

• Selectable ranges: ±2g, ±4g, ±8g, ±16g

• 13‑bit resolution (4 mg/LSB) – capable of detecting inclination changes as small as 0.25° 

HMC5883L / MMC5883MA – 3‑Axis Magnetometer

• Measures the Earth’s magnetic field for compass heading

• 12‑bit ADC with 1° to 2° heading accuracy

• Integral degaussing straps and offset cancellation 

BMP085 / BMP180 – Barometric Pressure & Temperature Sensor

• Measures atmospheric pressure (300 to 1100 hPa) and temperature

• Absolute accuracy down to 0.03 hPa

• Altitude resolution of approximately 0.25 meters 

Key Features

• 9‑Axis Motion Tracking: Gyroscope + accelerometer + magnetometer provides full 3D orientation sensing (yaw, pitch, roll)

• Altitude & Weather Sensing: Barometric pressure sensor adds altitude measurement and pressure trend detection

• Single I2C Interface: All sensors share the same I2C bus – only 2 pins (SDA, SCL) are needed

• Wide Voltage Compatibility: Operates from 3V to 5V, compatible with both 3.3V and 5V microcontrollers 

• Built‑in Sensor Fusion Ready: Sensor data can be combined using algorithms like Madgwick or Mahony filters for stable orientation estimation

• Compact Size: Small form factor (approx. 25x17mm) for easy integration into drones and robots 

Technical Specifications