GY-85 IMU 9-Aixs ITG3200/ITG3205 ADXL345 HMC5883L Sensor Module

Description

Product Overview

The GY-85 IMU 9-Axis Sensor Module is a complete motion-tracking solution that integrates three high-performance MEMS sensors on a single compact board: a 3-axis gyroscope (ITG3205/ITG3200) , a 3-axis accelerometer (ADXL345) , and a 3-axis magnetometer (HMC5883L) . This combination provides 9 degrees of freedom (9DOF) for precise orientation, motion, and heading detection.

Unlike single-sensor modules, the GY-85 fuses gyroscope, accelerometer, and magnetometer data to deliver stable, drift-free 3D orientation (yaw, pitch, and roll). It is widely used in drones (UAVs), quadcopters, robotics, head-tracking systems, gaming controllers, and inertial navigation systems.

All three sensors communicate via the I2C protocol, requiring only two data lines (SDA and SCL) to connect to your microcontroller. The module operates on 3V to 5V power, making it directly compatible with both 3.3V and 5V systems like Arduino, ESP32, ESP8266, Raspberry Pi, and STM32.

Key Features

• 9‑Axis Motion Tracking: Combines 3-axis gyroscope (angular velocity), 3-axis accelerometer (linear acceleration/gravity), and 3-axis magnetometer (magnetic heading) for full 3D orientation sensing.

• ITG3205/ITG3200 Digital Gyroscope: 3-axis angular rate sensor with 16‑bit ADC, ±2000°/s full-scale range, programmable low-pass filter, and 6.5mA low power consumption. Includes a built-in temperature sensor for drift compensation.

• ADXL345 3-Axis Accelerometer: High‑resolution (13‑bit) accelerometer with user‑selectable ranges of ±2g, ±4g, ±8g, or ±16g. Ultra‑low power: 23µA in measurement mode, 0.1µA in standby.

• HMC5883L 3-Axis Magnetometer: 12‑bit ADC with 1‑2° heading accuracy, ±8 Gauss range, and integrated degaussing straps. Capable of up to 160Hz sampling rate.

• Single I2C Interface: All sensors share the same I2C bus – only 2 pins (SDA, SCL) are needed to communicate with all three sensors. Built‑in logic level converter makes the module 3‑5V compatible.

• Compact Size: Measures approximately 22mm × 17mm, perfect for integration into drones, wearables, and space‑constrained projects.

• Sensor Fusion Ready: Sensor data can be combined using algorithms like the Madgwick or Mahony filter to produce accurate, drift-free absolute orientation (yaw, pitch, roll) without a separate processor.

• Wide Operating Temperature: Rated from -40°C to +85°C, suitable for industrial and outdoor applications.

Technical Specifications