// 01

Description

The GY-61 ADXL335 3-Axis Accelerometer Module is an easy-to-use motion sensor board that measures acceleration on three axes (X, Y, Z) using the well-known ADXL335 analog MEMS accelerometer. It outputs three analog voltages proportional to acceleration, allowing you to detect tilt, movement, vibration, and orientation changes in real time.

Because it’s an analog-output accelerometer, the GY-61 is great for beginners and projects where you want straightforward ADC readings without I2C/SPI configuration. It’s commonly used in DIY robotics, self-balancing experiments (basic), gesture/tilt control, vibration monitoring, and educational physics demonstrations.

How It Works

The ADXL335 senses acceleration along each axis and outputs a corresponding analog voltage:

XOUT → acceleration on X axis
YOUT → acceleration on Y axis
ZOUT → acceleration on Z axis

At rest, you can use the readings to estimate tilt relative to gravity. During motion, the outputs change based on acceleration and vibration.

Key Features & Benefits

3-Axis Sensing: Detect motion and tilt in X/Y/Z directions
Analog Output: Simple interface—just read voltages using ADC inputs
±3g Measurement Range: Suitable for general motion, tilt, and vibration projects
Compact Module: Easy to mount on robots and prototypes
Wide Compatibility: Works well with Arduino and many MCU boards with ADC pins
Great for Learning: Useful for STEM experiments and sensor calibration practice

Pinout (Typical GY-61 Module)

Pin	Function
VCC	Power input
GND	Ground
X	X-axis analog output
Y	Y-axis analog output
Z	Z-axis analog output
ST	Self-test (if provided on the board)

Note: Many ADXL335 modules are best operated at 3.3V. Some breakouts include regulation allowing 5V input, but the sensor itself is a low-voltage device. If unsure, power at 3.3V and keep outputs within ADC limits.

Typical Specifications

Item	Typical Value
Sensor	ADXL335
Axes	3 (X, Y, Z)
Output	Analog voltages (X/Y/Z)
Measurement Range	±3g
Operating Voltage (Sensor IC)	~1.8V–3.6V (3.3V typical)
Common Use	Tilt, acceleration, vibration sensing

Common Applications

Tilt-controlled robotics and RC projects
Motion/vibration monitoring and alarms
Balance detection and orientation experiments
Educational physics projects (acceleration/gravity)
DIY input devices (gesture/tilt controllers)

// 02

Specifications

Sensor ADXL335 (GY-61)

Axes 3 analog outputs

Range ±3 g

Supply Voltage 3-5 V

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// From Sensors