MPU6050 6DOF IMU Sensor Module Gyroscope & Accelerometer GY521

Specifications

• Main Chip: InvenSense MPU-6050
• Degrees of Freedom (DOF): 6 (3-Axis Gyroscope + 3-Axis Accelerometer)
• Communication Interface: I2C (Inter-Integrated Circuit)
• Input Voltage: 3.3V to 5V DC (Onboard Regulator)
• Gyroscope Range: ±250, ±500, ±1000, ±2000 °/s (Programmable)
• Accelerometer Range: ±2g, ±4g, ±8g, ±16g (Programmable)
• Pin Pitch: Standard 2.54mm (0.1")
• Dimensions: 20mm x 16mm
• Motion Processing: Integrated Digital Motion Processor™ (DMP) handles complex calculations onboard, offloading work from your microcontroller.

Applications

• Robotics: Self-balancing robots (Inverted Pendulum), Bi-pedal walking robots.
• Drones: Flight controllers for Quadcopters and Fixed-wing aircraft.
• Wearables: Gesture-controlled mouse gloves, Smartwatches, Fitness trackers.
• Gaming: Motion-sensitive game controllers, VR head tracking.
• Navigation: Dead reckoning systems when GPS is unavailable.

Pinout Guide:

• VCC: 3.3V - 5V Power Input
• GND: Ground
• SCL: I2C Serial Clock (Connect to A5 on Arduino Uno)
• SDA: I2C Serial Data (Connect to A4 on Arduino Uno)
• XDA/XCL: Auxiliary I2C bus (for connecting external magnetometers)
• AD0: Address Select (Low = 0x68, High = 0x69)
• INT: Interrupt Output (Notifies microcontroller when data is ready)

Learning Resources


 Voltage Warning: The logic levels on SCL/SDA are technically 3.3V. While most 5V Arduinos work fine directly, for long-term reliability on 5V systems, we recommend using a Logic Level Converter.

Package Includes:1 x MPU6050 6DOF Sensor Module (GY-521)
                                  1 x Straight Pin Header Strip (8-pin)
                                  1 x Right-Angle Pin Header Strip (8-pin)

 FAQs

1. How do I calibrate the MPU6050 to remove drift?
   Use a calibration sketch (often included in libraries) to calculate offsets. Place the sensor on a perfectly flat surface, run the sketch, and record the offset values to subtract from your raw readings.
2. Can I use two MPU6050 sensors on one Arduino?
   Yes. Connect the AD0 pin to GND on the first sensor (Address 0x68) and to VCC on the second sensor (Address 0x69).
3. Does this module include a Magnetometer (Compass)?
   No, this is a 6-axis module (Gyro+Accel). For a compass, you need a 9-axis module like the MPU9250.
4. Why am I getting "Check Wiring" errors in the Serial Monitor? Ensure your VCC is stable and SCL/SDA wires are not swapped. If the problem persists, try adding 4.7kΩ pull-up resistors to the I2C lines.
5. What is the DMP?
   The Digital Motion Processor is a coprocessor inside the chip that fuses gyro and accel data to output clean Euler angles or Quaternions, saving your Arduino from doing heavy math.
6. Will this work with Raspberry Pi?
   Yes. Connect to the Pi's 3.3V, GND, SDA, and SCL pins. You will need to enable I2C in raspi-config.
7. What is the default I2C address?
   The default address is 0x68 (when AD0 is unconnected or grounded).
8. Can I use this with an ESP32?
   Yes, the ESP32 is 3.3V logic, making it perfectly compatible. Use standard I2C pins (usually GPIO 21 and 22).
9. How do I calculate pitch and roll?
   You can calculate pitch and roll using trigonometry on the accelerometer data, but for stable results, use a Complementary Filter or Kalman Filter to combine Gyro and Accel data.
10. What is the difference between GY-521 and other MPU6050 boards?
    GY-521 is the specific model number of this breakout board. It is the most common and widely supported version with an onboard voltage regulator.
11. Does the module come soldered?
    Usually, the module comes with headers included but not soldered, allowing you to choose between straight or right-angle pins.
12. Why do my values drift over time?
    Gyroscopes drift due to temperature and integration errors. This is normal. Use the accelerometer data to correct the gyro drift over the long term (sensor fusion).
13. What is the maximum sampling rate?
    The gyroscope output rate can go up to 8kHz, but the I2C bus speed usually limits the practical data retrieval rate.
14. Is this sensor waterproof?
    No, the PCB is exposed. For outdoor use, it must be mounted inside a waterproof enclosure.
15. Can I use the INT pin to wake up my microcontroller?
    Yes, the MPU6050 can generate an interrupt on motion detection, which can wake an Arduino from sleep mode.