The GY-61 ADXL335 3-Axis Accelerometer Module is a compact and versatile sensor designed to measure acceleration along the X, Y, and Z axes. This module is widely used in various applications such as motion detection, vibration monitoring, and tilt sensing in robotics and electronics projects. With its analog output, it provides real-time acceleration data that can be easily interfaced with microcontrollers like Arduino.

Key Features

• 3-Axis Measurement: Measures acceleration along three axes (X, Y, Z) to capture movement in 3D space.
• Analog Output: Provides three separate analog voltage outputs corresponding to each axis.
• Low Power Consumption: Designed for energy-efficient operation, making it suitable for battery-powered applications.
• Compact Size: Small module size allows easy integration into various projects and devices.
• Easy Integration: Compatible with most microcontrollers and development boards for straightforward implementation.

Applications

• Motion and vibration detection.
• Tilt sensing in robotics and wearable devices.
• Gaming controllers and motion-based interfaces.
• Stability control in automotive and aerospace applications.

Specifications

• Accelerometer Type: Analog 3-Axis Accelerometer
• Model: ADXL335
• Measurement Range: ±3g (g = acceleration due to gravity)
• Output Voltage Range:
  • X-axis: 0V to 3.3V (corresponding to -3g to +3g)
  • Y-axis: 0V to 3.3V (corresponding to -3g to +3g)
  • Z-axis: 0V to 3.3V (corresponding to -3g to +3g)
• Sensitivity: Approximately 300mV/g (millivolts per gravity)
• Power Supply: 3.3V to 5V DC
• Current Consumption: Approximately 350µA
• Operating Temperature Range: -40°C to +85°C
• Dimensions: 20mm x 15mm x 3mm
• Interface: Analog output for each axis (X, Y, Z)

Pinout:

• VCC: Power supply pin (3.3V to 5V)
• GND: Ground pin
• X: Analog output for X-axis acceleration
• Y: Analog output for Y-axis acceleration
• Z: Analog output for Z-axis acceleration

Note: Ensure proper calibration and scaling when interpreting the analog output values for accurate acceleration measurements.

How to interface with Arduino?

To interface the GY-61 ADXL335 3-Axis Accelerometer Module with an Arduino UNO, follow these steps:

1. Wiring Connections

The GY-61 ADXL335 module typically has the following pins:

• VCC: Power supply (usually 3.3V or 5V)
• GND: Ground
• XOUT: X-axis analog output
• YOUT: Y-axis analog output
• ZOUT: Z-axis analog output

Wiring:

• VCC to 5V on Arduino (or 3.3V if using a 3.3V module)
• GND to GND on Arduino
• XOUT to Analog Pin A0 on Arduino
• YOUT to Analog Pin A1 on Arduino
• ZOUT to Analog Pin A2 on Arduino

2. Code Example

Here’s a basic code example to read the accelerometer values and print them to the Serial Monitor:

// Define analog pins connected to the accelerometer
const int xPin = A0;
const int yPin = A1;
const int zPin = A2;

void setup() {
  Serial.begin(9600); // Initialize serial communication
}

void loop() {
  int xValue = analogRead(xPin); // Read X-axis value
  int yValue = analogRead(yPin); // Read Y-axis value
  int zValue = analogRead(zPin); // Read Z-axis value

  // Print the values to the Serial Monitor
  Serial.print("X: ");
  Serial.print(xValue);
  Serial.print(" Y: ");
  Serial.print(yValue);
  Serial.print(" Z: ");
  Serial.println(zValue);

  delay(500); // Wait for 500 milliseconds before the next read
}

3. Important Notes

• Power Supply: The ADXL335 can operate at both 3.3V and 5V, but check your specific module’s voltage requirements. Ensure the power supply matches the module specifications.
• Output Range: The analog output from the ADXL335 typically ranges from 0V to 3.3V (or 5V, depending on the module’s power supply), which corresponds to 0 to 1023 in the Arduino’s analog readings.
• Calibration: For accurate measurements, you may need to calibrate the sensor. The raw analog values represent the sensor's output voltage, and you may need to convert them to actual acceleration values based on the sensor's sensitivity and range.

4. Example Output

The Serial Monitor will display the X, Y, and Z axis values as follows:

X: 512 Y: 512 Z: 512

These values represent the sensor's output for each axis. The values will change based on the orientation and movement of the accelerometer.

By following these steps, you can successfully interface the GY-61 ADXL335 3-Axis Accelerometer Module with your Arduino UNO and start reading accelerometer data.