Muscle Sensor MASK version

For my final project in Circuit Design and Prototyping, I plan to make a customized muscle sensor (EMG) for my thesis MASK, and the idea is to use the data as a measurement of mask wearer’s nervousness, and try to cope with it with MASK (virtually and hopefully also physically).

Research

Breadboarding

This is the first attempt to breadboard the muscle sensor, based on the design of the one on Sparkfun and also the tutorials on instructables. Because I don’t have the component, e.g. instrumentation amp, specific resistors, there are a lot of hacky moves, and I need sticker patch electrodes, 9v batteries*2, and components to know if it’s working or not :/

muscleSensorBB

 <– originally thinking to hook up two power supplies, but because it requires one’s positive connecting to another’s negative, I think I should ask Eric first to see if it’s safe to do that instead of using two batteries

 

Next steps

  1. Order components (Should I order both surface mount(for final) and through hole(for testing)?)
  2. Combine and adjust SpikeShield 2-Channel SpikerBox’ schematics, so having two inputs for microcontroller (using ATTINY)
  3. Design the shape and arrangement of the circuit to fit on the mask
  4. Qs to answer
    • What’s the power supply strategy to integrate microcontroller on the same board, with 9V for sensors and 3~5V for microcontroller?

 

Getting excited :DDD Lots of work and to be continued!

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