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MyoWare 2.0 LED Shield

by Sparkfun

The MyoWare® 2.0 LED Shield is designed to display the magnitude of a target muscle's signal and power the MyoWare 2.0 Muscle Sensor with its built-in battery.

The blue 10-segment bar graph shows the magnitude of the measured signal. The more muscle activation measured, the higher up the board LEDs will go! With this shield, you will be provided with a visual representation of the signals provided by the MyoWare 2.0 Muscle Sensor. The LED shield is equipped with snap connectors on the board so you can easily stack it on the top side of the MyoWare 2.0 Muscle Sensor and flip the switch to the ON position to give the sensor all the power it needs to work its myoelectric magic.

Each board comes with a 40mAh single cell, lithium polymer (LiPo) battery soldered to the board. Recharge the battery through the USB Type C connector and its dedicated LiPo charging circuit set to a charge rate of 40mA. This board also includes status LEDs for charging (CHG, FULL, and power (VIN)). Connecting the MyoWare 2.0 Muscle Sensor to battery power allows for a cleaner signal while also eliminating the possibility of creating a dangerous current path to the power grid. Use it to gauge how hard you’re working a muscle during a workout, as a teaching tool, or add some myoelectric flair to your Halloween costume!

Note: MyoWare and the LED Shield are not intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation treatment, or prevention of disease, in a man or other animals.

The MyoWare® 2.0 ecosystem consists of shields that easily interface with the MyoWare® 2.0 Muscle Sensor, which is a low-cost, Arduino-compatible, all-in-one electromyography (EMG) sensor from Advancer Technologies. The innovative connector system allows users to easily snap shields together with a compact low profile and connect to a microcontroller's analog input to measure raw, filtered, and rectified electrical activity of a target muscle. This eliminates the need to solder connections between boards.

This product is a collaboration with Brian Kaminski from Advancer Technologies. A portion of each sales goes back to them for product support and continued development.

Get started with the MyoWare 2.0 Cable Shield Guide

Features

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

Documents

[1] Note: This product is patent protected. To prevent counterfeit boards, the Eagle design files and GitHub hardware repository are not shared for boards in the MyoWare 2.0 ecosystem.