ADXL335 Triple-Axis Accelerometer

Overview

The ADXL335 is a compact analog accelerometer that measures acceleration along three axes (X, Y, Z).

It is widely used for:

• Motion detection

• Tilt sensing

• Vibration monitoring

• Gesture-based controls

Working Principle

The sensor is based on MEMS (Micro-Electro-Mechanical Systems) technology:

• Inside tiny movable structures (capacitive plates)

• When acceleration occurs structure shifts

• This changes capacitance converted to voltage

Output is analog voltage proportional to acceleration

Infographic Summary

Measures: Acceleration Axes: X, Y, Z (3-axis) Voltage: 1.8V 3.6V Output: Analog (3 pins) Range: 3g Tech: MEMS

Pin Configuration

ADXL335 Module VCC 3.3V GND Ground X X-axis output Y Y-axis output Z Z-axis output ST Self-test

Key Specifications

• Operating Voltage: 1.8V 3.6V

• Measurement Range: 3g

• Output: Analog (X, Y, Z voltages)

• Bandwidth: Up to 1600 Hz (X/Y), 550 Hz (Z)

• Low power consumption (~350 A)

• Sensitivity: ~300 mV/g

Key Features

• 3-axis acceleration sensing

• Analog output (no complex communication)

• Easy to use with microcontrollers

• Small and lightweight

• Low power usage

Applications

• Mobile orientation detection

• Robotics balance systems

• Vehicle vibration monitoring

• Motion-based gaming

• Fall detection systems

• Drone stabilization (basic)

Interfacing

Works with:

• Arduinostrong>analog input pins

  Output Behavior

  At rest (flat):

  • X 0g

  • Y 0g

  • Z +1g (gravity)

   

  Important Notes

  • Works only on 3.3V (NOT 5V directly)

  • Requires ADC for reading values

  • Analog signals can be noisy use filtering

  • Needs calibration for accurate results

   

  ADXL335 vs Digital IMU (e.g., MPU series)

  Pro Tip

  • Use moving average filter to smooth readings

  • Combine with gyroscope for better motion tracking

  • Ideal for beginner-friendly motion projects

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