GY-61 ADXL335 3-Axis Analog Output Accelerometer Module User Manual

1. Introducció

This manual provides essential information for the proper setup, operation, and maintenance of the HiLetgo GY-61 ADXL335 3-Axis Analog Output Accelerometer Module. The ADXL335 is a small, thin, low power, complete 3-axis accelerometer with signal conditioned voltage outputs. It measures acceleration with a minimum full-scale range of ±3 g. It can measure the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion, shock, or vibration.

Please read this manual thoroughly before using the module to ensure safe and efficient operation.

2. Producte acabatview

The GY-61 module integrates the Analog Devices ADXL335 sensor, providing analog voltage outputs proportional to acceleration along the X, Y, and Z axes. It is designed for easy integration into various electronic projects, particularly with microcontrollers like Arduino.

2.1 Característiques clau

• 3-axis sensing (X, Y, Z)
• Vol analògictage sortides
• Baix consum d'energia
• Vol operatiu amplitagrang electrònic (3V-5V)
• Factor de forma petit

2.2 Components del mòdul

Figura 1: superior view of the GY-61 ADXL335 accelerometer module. This image displays the blue printed circuit board (PCB) with the central ADXL335 integrated circuit, surrounding passive components, and six through-hole pads for connection. A separate black male header pin strip is shown alongside the module, indicating it needs to be soldered for connectivity.

Figura 2: A baix view of the GY-61 ADXL335 accelerometer module. This image shows the underside of the blue PCB, highlighting the solder pads for the header pins and two larger mounting holes at the corners.

The module typically includes the ADXL335 sensor, voltage regulators, and filtering capacitors to provide stable and clean analog outputs. The six pins provide connections for power, ground, and the three analog output channels (X, Y, Z).

3. Informació de seguretat

When working with electronic components, always observe the following safety precautions:

• Ensure power is disconnected before making or changing connections.
• Avoid touching exposed circuit board components when power is applied.
• No supereu el volum de funcionament especificattage range (3V-5V) to prevent damage to the module.
• Handle the module by its edges to avoid electrostatic discharge (ESD) damage. Use ESD-safe practices if possible.
• Mantingueu el mòdul allunyat de líquids i temperatures extremes.

4. Configuració

This section details the steps required to prepare the GY-61 module for use.

4.1 Pinout

The GY-61 module typically has six pins. Refer to the module's silkscreen for exact pin labels, but common pin assignments are:

• VCC: Power supply input (3V to 5V DC)
• GND: Terra
• X_OUT: Analog output for X-axis acceleration
• Y_OUT: Analog output for Y-axis acceleration
• Z_OUT: Analog output for Z-axis acceleration
• ST: Self-Test pin (usually left unconnected or pulled low for normal operation)

4.2 Connecting to a Microcontroller (e.g., Arduino)

1. Solder Header Pins: If not already attached, solder the provided male header pins to the module's six through-holes.
2. Connectar l'alimentació: Connecteu el VCC pin of the GY-61 module to the 5V or 3.3V output of your microcontroller (e.g., Arduino's 5V or 3.3V pin). Ensure the voltage matches the module's operating range.
3. Connectar a terra: Connecteu el GND pin of the GY-61 module to the GND pin of your microcontroller.
4. Connect Analog Outputs: Connecteu el X_OUT, Y_OUT, i Z_OUT pins of the GY-61 module to analog input pins on your microcontroller (e.g., Arduino's A0, A1, A2).
5. Self-Test Pin (ST): For normal operation, leave the ST pin unconnected or connect it to GND. Refer to the ADXL335 datasheet for self-test functionality if needed.

Figura 3: Detallada view of the GY-61 module's pin labels. This image clearly shows the silkscreen markings for each of the six pins: X, Y, Z, ST, VCC, and GND, which are crucial for correct wiring.

5. Instruccions de funcionament

Once connected, the module outputs analog voltages that can be read by an Analog-to-Digital Converter (ADC) on your microcontroller.

5.1 Reading Analog Outputs

El voltage for each axis is proportional to the acceleration experienced along that axis. When the module is stationary and level, the Z-axis will typically read approximately 1g (due to gravity), while X and Y axes will read approximately 0g.

• Calibració: It is recommended to calibrate the sensor by taking readings when the module is stationary and level. This establishes the "zero-g" offset for X and Y axes and the "1g" offset for the Z-axis.
• Sensibilitat: The ADXL335 has a typical sensitivity of 300 mV/g at a 3.3V supply. This value can vary slightly with supply voltage. Refer to the ADXL335 datasheet for precise sensitivity values at different supply voltages.
• Converting to G-force: After reading the analog voltage (e.g., using analogRead() on Arduino), convert it to voltage, then use the sensitivity to calculate the acceleration in 'g's.

Ex. 5.2ample Application (Tilt Sensing)

By monitoring the X and Y axis outputs, the module can be used to detect tilt. When the module is tilted, the component of gravity along the X or Y axis changes, resulting in a change in their respective output voltages.

For dynamic acceleration (motion, vibration), the changes in output voltage will be more rapid and can be used for motion detection, impact sensing, or vibration analysis.

6. Manteniment

The GY-61 ADXL335 module is a robust electronic component that requires minimal maintenance. Follow these guidelines to ensure its longevity:

• Mantenir net: Periodically inspect the module for dust or debris. Clean gently with a soft, dry brush or compressed air. Avoid using liquids or solvents.
• Emmagatzematge: Store the module in a dry, cool environment, preferably in an anti-static bag, when not in use.
• Protecció física: Avoid dropping or subjecting the module to excessive physical shock, as this can damage the sensitive internal sensor.
• Integritat de la connexió: Ensure all soldered connections are secure and free from cold joints or shorts.

7. Solució De Problemes

If you encounter issues with your GY-61 ADXL335 module, consider the following troubleshooting steps:

• No Output/Incorrect Readings:
  • Verify power connections (VCC and GND) are correct and within the 3V-5V range.
  • Check all analog output connections (X_OUT, Y_OUT, Z_OUT) to the microcontroller's ADC pins.
  • Ensure the ST pin is correctly handled (left floating or connected to GND for normal operation).
  • Confirm your microcontroller's analog reference voltage is correctly set in your code.
  • Check for any short circuits or loose solder joints on the module or connecting wires.
• Lectures sorolloses:
  • Ensure a stable power supply. Add a small capacitor (e.g., 0.1uF) across VCC and GND near the module if power supply noise is suspected.
  • Implement software averaging or filtering in your microcontroller code to smooth out readings.
  • Ensure the module is securely mounted and not vibrating excessively if static readings are desired.
• El mòdul no respon:
  • Double-check all wiring against the pinout.
  • Test with a different power supply or microcontroller to rule out external component issues.
  • Inspect the module for any visible physical damage.

8. Especificacions

9. Garantia i Suport

Specific warranty information for the HiLetgo GY-61 ADXL335 module is not provided in this manual. For details regarding warranty coverage, returns, or technical support, please refer to the seller's policy or contact the manufacturer, HiLetgo, directly through their official channels or the platform where the product was purchased.

For additional technical resources and datasheets for the ADXL335 sensor, please refer to Analog Devices' official weblloc.