code: function DisplayOTron(model) {
      if (!(this instanceof DisplayOTron)) {
          return new DisplayOTron(model);
      }
      
      this.model = model;
      
      this.pythonProcess = null;
      
      this.reset();
      
      events.EventEmitter.call(this);
  }
docs: Creates a new `DisplayOTron` object.
  Note: this class is used internally only. You should not instantiate or call it directly.
  @constructor
  @param {String} model The Display-O-Tron model (should be either '3k' or 'HAT').