EMG Sensor Module – Muscle Signal Sensor for Biofeedback & Arduino

Description

The EMG Sensor Module is a surface electromyography (sEMG) sensor designed to detect the electrical activity generated by muscle contractions. When a muscle flexes, motor units recruit and generate small electrical potentials that can be measured at the skin surface. The sensor amplifies and filters these microvolt-level signals, outputting an analog voltage proportional to muscle activity intensity .

The MyoWare 2.0 variant features a wearable, solderless snap-connector system that eliminates wiring between the sensor and electrodes, reducing noise and simplifying setup. It offers three output modes: raw EMG, rectified EMG, and envelope (processed) output. The onboard gain is adjustable via potentiometer, and indicator LEDs show power and signal activity . The sensor operates from a single supply of +3.3V to +5V, making it directly compatible with Arduino, ESP32, and most microcontroller platforms .

Typical applications include biofeedback systems, prosthetic control, robotics, and interactive projects where muscle signals replace traditional inputs .

Critical limitations: This is not a medical device. The manufacturer explicitly states it is not intended for diagnosing, treating, or preventing disease . Signal quality depends heavily on electrode placement, skin preparation, and motion artifacts. EMG signals are in the microvolt range and are easily corrupted by power-line noise, muscle crosstalk, and movement. For reliable readings, the skin must be clean (alcohol wipe), electrodes placed on the muscle belly, and the subject should remain still during measurement .

Features

• Surface EMG Detection: Measures muscle electrical activity for biofeedback and control applications .

• Solderless Snap Connectors: Direct attachment of biomedical electrodes eliminates wiring noise (MyoWare 2.0) .

• Three Output Modes: Raw EMG, rectified, and envelope (processed) outputs for different use cases .

• Adjustable Gain: Onboard potentiometer allows sensitivity tuning for different muscle groups .

• Wide Supply Compatibility (3.3V–5V): Works directly with Arduino, ESP32, and other microcontrollers .

• Reverse Polarity Protection: Protects the board during prototyping .

• Indicator LEDs: Power and signal activity LEDs for visual feedback .

• Compact Wearable Design: Small form factor suitable for wearable and portable projects .

Technical Specifications