DFRobot Gravity: Analog EMG Sensor by OYMotion is a high-quality, non-invasive sensor designed to detect sEMG (surface electromyography) signals, reflecting human muscle and neural activity. This sensor is a perfect solution for projects requiring real-time muscle activity monitoring, such as human-computer interactions, robotic control, and biofeedback systems.
The module features a differential input and built-in analog filter circuit, which amplifies weak muscle signals (±1.5mV) by 1000 times while minimizing noise interference. The output signal range is 0 to 3.0V, with a 1.5V reference voltage. It provides easy-to-use, high-quality signal collection without the need for conductive gel, making it more convenient and durable than traditional medical electrodes.
Key Features
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Metal dry electrodes for long life and easy usage
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Differential input with high common mode rejection ratio (CMRR)
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Low power consumption with single 3.3V to 5.5V power supply
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Provides accurate readings of muscle strength and activity
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No conductive gel needed, making it more convenient and durable
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Can be easily integrated with Arduino for muscle activity detection and robotic control
Applications
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Human-computer interaction for assistive technology
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Robotic control using muscle signals
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Biofeedback systems for physical therapy
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Interactive projects such as myoelectric mouse and wearable devices
Specifications
Signal Transmitter Board:
| 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°C |
| Size | 22mm x 35mm (0.87 x 1.38 inches) |
Dry Electrode Board:
| Electrode Connector | PJ-342 |
| Wire Length | 50cm (19.69 inches) |
| Plate Size | 22mm x 35mm (0.87 x 1.38 inches) |
| Weight | 36g |
Example Projects
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Head-mounted Myoelectric Mouse
Parts needed: Arduino Leonardo, Gravity: Analog EMG Sensor, IMU shield, and more. -
A Christmas Present for Kids: A Clever Rabbit Hat
Parts needed: Gravity: Analog EMG Sensor, Beetle Arduino, 9g servos, and more.
In the Box
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1 x EMG Dry Electrode Board
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1 x Wrist Belt
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1 x Electrode Cable
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1 x EMG Signal Transmitter Board
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1 x Gravity Analog Cable 3Pin