About

The armchair project introduces a wireless interface to control a motorized wheelchair. Custom computer software interprets hand gestures from a Myo Gesture Control Armband, sends the wireless commands to a Raspberry Pi mounted on the wheelchair, which in turn sends commands to an Arduino to operate one of two servos mounted next to the wheelchair's controller.

Our inspiration for this project came from a desire to do a hack that would have a humanitarian element. One of our members had a contact at The Delrey School who was able to lend us an electric wheelchair. Josh Z. and Luke met on the Hack-A-Thon’s “Find a group” channel. Josh S. joined to offer his experience with hardware hacking and electronics.

Armchair removes the requirement that the driver of an electric wheelchair be able to manipulate the control stick (or even be sitting in the chair at all). Using Armchair, a disabled person who has limited limb movement, shortened arms, or even one who is missing a hand entirely can still control their wheelchair with simple arm motions and muscle contractions.

People

Shoutouts

Dependencies

  • NodeJS, a JavaScript runtime built on Chrome's V8 JavaScript engine.
  • MyoJS, Thalmic Labs Myo JavaScript Framework.
  • WebSocket-Node, A WebSocket Implementation for NodeJS.
  • Q, A tool for creating and composing asynchronous promises in JavaScript.
  • johnny-five, JavaScript Robotics and IoT programming framework.

Work Performed Prior to Contest

-Planning discussions only

Installation

Myo Server

  • npm install -g q
  • npm install -g websocket
  • ./install_server_dependencies.sh

Raspberry Pi Client

  • npm install -g websocket
  • npm install -g johnny-five

Usage

Myo Server

  • node myojs/examples/armchair.js

Raspberry Pi Client

  • node armchair_client.js

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