New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  controllerValue: 'Initial value from controller'
});

templates.application.hbs

controllerValue: {{controllerValue}}
<br>

{{ddau-form-field value=controllerValue onchange=(action (mut controllerValue))}}

templates.components.ddau-form-field.hbs

<input type='text' value={{value}} oninput={{action onchange value='target.value'}}>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}