DFRobot
Gravity: Analog EMG Sensor by OYMotion
The Gravity Analog EMG Sensor by OYMotion detects surface electromyography (sEMG) signals to measure muscle and neural activity. The sensor amplifies the tin...
The Gravity Analog EMG Sensor by OYMotion detects surface electromyography (sEMG) signals to measure muscle and neural activity. The sensor amplifies the tiny sEMG signal (±1.5 mV) by 1000× and filters noise through differential input and analogue filtering, outputting a clean 0–3.0V analogue signal with 1.5V reference voltage.
The module uses reusable metal dry electrodes — no conductive gel required — making it convenient for repeated use in both static and dynamic applications. Connect to an Arduino or other microcontroller to detect muscle tension, measure contraction strength, and analyse sEMG waveforms.
Key Features
- 1000× Signal Amplification – Amplifies ±1.5 mV sEMG signals to a 0–3.0V analogue output
- Differential Input – High common-mode rejection ratio for noise suppression
- Metal Dry Electrodes – Reusable, no conductive gel needed
- Analogue Output – 0–3.0V with 1.5V reference, Gravity interface compatible
- Low Power – Single supply, minimal current draw
- Effective Bandwidth – 20–500 Hz
Specifications
Signal Transmitter Board
- Supply Voltage – 3.3–5.5V
- Output Voltage – 0–3.0V
- Detection Range – ±1.5 mV
- Electrode Connector – PJ-342
- Module Connector – PH2.0-3P
- Operating Temperature – 0–50°C
- Board Size – 22 × 35 mm
Dry Electrode Board
- Connector – PJ-342
- Wire Length – 50 cm
- Board Size – 22 × 35 mm
- Weight – 36 g
Ideal For
- Human-computer interaction prototyping
- Muscle activity detection and analysis
- Prosthetic and rehabilitation research
- Biometric Arduino projects
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- Differential input
- A measurement method where the board reads the voltage difference between two input wires instead of measuring one wire compared with ground. This is useful for small sensor signals and noise reduction, but both input voltages still need to stay within the board’s allowed range.
- Gravity
- Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
Find this product in
Brands
Sensors & Input
Related Tutorials
Free guides on learn.littlebird.com.au
