SparkFun

MyoWare 2.0 LED Shield

Name: MyoWare 2.0 LED Shield
Brand: SparkFun
SKU: SF-DEV-21869
Price: 52.51 AUD
Availability: InStock

· MPN: DEV-21869

LED Strips & Bars Wearable Tech & E-textiles

$52.51 |

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This shield gives your MyoWare 2.0 Muscle Sensor an easy visual output, using a blue 10-segment bar graph to show the magnitude of a target muscle’s signal. ...

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This shield gives your MyoWare 2.0 Muscle Sensor an easy visual output, using a blue 10-segment bar graph to show the magnitude of a target muscle’s signal. As muscle activation increases, the LEDs climb further up the board.

It snaps onto the top side of the MyoWare 2.0 Muscle Sensor using the onboard snap connectors, with a power switch to turn the sensor on from the shield. A 40mAh single-cell LiPo battery is soldered to the board, helping provide cleaner battery-powered measurements and avoiding a current path back to mains-powered equipment.

Charging is handled through the USB Type-C connector with a dedicated LiPo charge circuit, and the board includes status LEDs for CHG, FULL and VIN. It fits into the MyoWare 2.0 ecosystem for solderless stacking with compatible shields and connection to a microcontroller analogue input.

Documentation available for this ecosystem includes a hookup guide, quickstart guide, advanced guide, MCP73831 datasheet, battery datasheet and MSDS, ArduinoBLE reference material, a GitHub example repo and the MyoWare 2.0 ecosystem page.

Features:

Signal display: Blue 10-segment bar graph shows the magnitude of the measured muscle signal.
Stackable design: Snap connectors allow the shield to stack on the top side of the MyoWare 2.0 Muscle Sensor.
Battery powered: Built-in LiPo battery can power the MyoWare 2.0 Muscle Sensor.
USB charging: Recharge the battery through the USB Type C connector.
Status indicators: Includes charging and power status LEDs for CHG, FULL and VIN.
Solderless ecosystem: MyoWare 2.0 shields snap together with a compact low profile.
Analogue measurement path: The MyoWare 2.0 ecosystem can connect to a microcontroller's analog input to measure raw, filtered, and rectified electrical activity of a target muscle.

Specifications:

Input Voltage: 5V via USB Type C Connector
Output Voltage (e.g. "VIN") Nominal Voltage: 3.7V
Output Voltage (e.g. "VIN") Fully Charged: 4.2V
Power Switch: Power Switch
Built-in LiPo Battery: Built-in LiPo Battery
Built-in LiPo Battery Rated Capacity: 40mAh
Built-in LiPo Battery Nominal Voltage: 3.7V
Built-in LiPo Battery Max Charge Current: 1C (40mA)
Charge IC: MCP73831 Single Cell LiPo Charge IC
Charge Rate: Set to 40mA
Form Factor: MyoWare® 2.0 Muscle Sensor Form Factor
Snap Pins: 3x Female Snap Pins (Power and EMG Envelope Output)
LEDs: VIN
LEDs: FULL
LEDs: CHG
LEDs: 2x 5-Segment Bars
Board Dimensions: 46.15mm x 38.00mm (1.82” x 1.50”)
Revision Changes: This revision of the MyoWare 2.0 LED Shield includes a 2-pin, 1.00mm pitch JST-SH connector.

MyoWare and the LED Shield are not intended for use in diagnosis, cure, mitigation, treatment or prevention of disease. It is suited to education, prototyping, workout feedback and creative myoelectric projects.

Jargon buster

Plain-language definitions for the technical terms used above.

LED: A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
LiPo: A lithium polymer rechargeable battery commonly used in portable electronics projects. It matters because LiPo batteries need correct charging circuitry and care, and this board includes hardware intended for that battery type.
MCP73831: A lithium battery charger chip used to safely charge a single-cell LiPo battery. It matters because it lets the board recharge a battery from USB or another input without needing a separate charger module.
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.
Shield: An add-on board that plugs into a main controller board to give it extra features such as sensing, motor control or communication. Knowing a product supports shields helps you judge whether it can connect neatly into an existing maker-board setup.
USB Type-C: A reversible USB connector used for power and data on many modern devices. On this kit it indicates an alternate 5V power input, which may be useful for setup or charging without the solar panel.