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Gravity: Analog EMG Sensor

SKU: SEN0240

Gravity: Analog EMG Sensor(by DFRobot and OYMotion) offers a noninvasive method to detect muscle and neural activities through sEMG, featuring integrated filtering and amplification circuits. Its output is analog, based on a 1.5V reference voltage, and ranges from 0 to 3.0V. The sensor is compatible with Arduino, allowing users to analyze muscle tension and strength. Easy to use with dry electrodes, it is ideal for both static and dynamic applications, offering a longer lifespan compared to traditional medical electrodes. The sensor is suitable for various human-computer interaction applications, expanding beyond traditional medical uses.

Overhead shot of analog EMG sensor modules showing components and connectors-DFRobot product sku:SEN0240 image.

Downloadable Resources

  • Docs
  • Tech Specs
  • Blog
    • 1. Example Code for Arduino-Calibration and Print Waveform

    This article guides you through using an Arduino to calibrate and print waveforms with EMG sensors, providing detailed instructions on hardware preparation, software setup, and calibration steps for effective EMG signal processing.
    2. Example Code for Arduino-Fist Count

    The article provides a comprehensive guide on using Arduino and EMG sensor to accurately count fist movements. It includes hardware and software preparation, wiring instructions, sample code, calibration tips, and troubleshooting advice to ensure precise counting results.
    Reference

    This article explains the correct placement of dry electrodes for EMG sensors, highlighting the importance of aligning with muscle direction and offering practical insights through an image and application video.

    Specification

    • Signal Conditioner Board
    Parameter Specification
    Supply Voltage 3.3V～5.5V
    Operating Voltage 3.0V
    Detection Range +/-1.5mV
    Electrode Connector PJ-342
    Module Connector PH2.0-3P
    Output Voltage 0～3.0V
    Operating Temperature 0～50℃
    Size 22mm*35mm (0.87inch*1.38inch)
    • Dry Electrode Board
    Parameter Specification
    Electrode Connector PJ-342
    Wire Length 50cm(19.69inch)
    Plate Size 22 * 35 mm(0.87inch*1.38inch )
    weight 36g

    Pinout

    Analog_EMG_Sensor_Pinout

    Num Label Description
    1 A Analog Signal Output(0~3.0V)
    2 + Power Supply Anode(3.3~5.5V)
    3 - Power Supply Cathode(0V)
    4 PJ-342 Probe Wiring Connector
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    author
    DFRobot Dec 21, 2018
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    Head-mounted Myoelectric Mouse

    Discover how advanced technologies like motion sensing, myoelectric sensing, and speech recognition can transform accessibility. Enable hands-free mouse control, detect tooth muscle movements for mouse clicks, and utilize voice commands for fast control and input.

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    FAQ

    • The sensor reading is abnormally large or unchanged.

      1. Check whether the power supply of your sensor is stable;
      2. Please check whether the direction of the electrode patch is consistent with the direction of the muscle (as shown below), and the electrode patch should be tied to a large area of exposed skin.
      3. Try pulling out the connector of the sensor electrode to see if the reading is normal.
      You can also check out this quiz video:

      https://drive.google.com/file/d/1ANKqwHs0pEY-TzOjP-e0kYbKdSF-vMTM/view?usp=sharing

    • Where should I put the dry electrode? Is there any special requirement?
      In general, the corresponding 3 metal dry electrode plate needs not pay attention to the reference voltage. It only need to consistent with the direction of muscle.

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