am 904f4810: doc change: added link to diydrones and a few small changes

      <h2>In this document</h2>

      <ol>

        <li><a href="#components">ADK Components</a></li>

        <li>

          <a href="#getting-started">Getting Started with the ADK</a>

          <ol>

        </li>

      </ol>

      <h2>Where to Buy</h2>

      <h2>See also</h2>

      <ol>

        <li><a href="http://www.youtube.com/watch?v=s7szcpXf2rE">Google I/O Session Video</a></li>

        <li><a href="{@docRoot}guide/topics/usb/accessory.html">USB Accessory Dev Guide</a></li>

      </ol>

      <h2>Where to buy</h2>

      <ol>

        <li><a href=

        "http://www.rt-shop.sakura.ne.jp/rt-shop/index.php?main_page=product_info&products_id=2731&language=en">

        "http://www.rt-net.jp/shop/index.php?main_page=product_info&cPath=3_4&products_id=1">

        RT Corp</a></li>

        <li><a href=

        "http://www.microchip.com/android">

        Microchip</a></li>

        <li><a href="https://store.diydrones.com/ProductDetails.asp?ProductCode=BR-PhoneDrone">

        DIY Drones</a></li>

      </ol>

    </div>

  </div>

  released Android-powered devices are only capable of acting as a USB device and cannot initiate

  connections with external USB devices. Android Open Accessory support overcomes this limitation

  and allows you to build accessories that can interact with an assortment of Android-powered

  devices by allowing the accessory initiate the connection.</p>

  devices by allowing the accessory to initiate the connection.</p>

  <p class="note"><strong>Note:</strong> Accessory mode is ultimately dependent on the device's

  hardware and not all devices will support accessory mode. Devices that support accessory mode can

  Android manifest. For more information, see the <a href=

  "{@docRoot}guide/topics/usb/accessory.html#manifest">USB Accessory</a> Developer Guide.</p>

  <p>The following list of distributers are currently producing Android Open Accessory compatible

  development boards:</p>

  <ul>

    <li><a href="http://www.rt-net.jp/shop/index.php?main_page=product_info&cPath=3_4&products_id=1">

    RT Corp</a> provides an Arduino-compatible board based on the Android ADK board design.</li>

    <li><a href="http://www.microchip.com/android">Microchip</a> provides a A PIC based USB

    microcontroller board.</li>

    <li><a href="https://store.diydrones.com/ProductDetails.asp?ProductCode=BR-PhoneDrone">DIY

    Drones</a> provides an Arduino-compatible board geared towards RC (radio controlled) and UAV

    (unmanned aerial vehicle) enthusiasts.</li>

  </ul>

  <p>We expect more hardware distributers to create a variety of kits, so please stay tuned for

  further developments.</p>

  <h2 id="components">ADK Components</h2>

  <p>The Android Open Accessory Development Kit (ADK) provides an implementation of an Android USB

  accessory that is based on the <a href="http://www.arduino.cc/">Arduino open source electronics

  prototyping platform</a>, the accessory's hardware design files, code that implements the

  accessory's firmware, and the Android application that interacts with the accessory. The hardware

  design files and code are contained in the <a href=

  "https://dl-ssl.google.com/android/adk/adk_release_0506.zip">ADK package download</a>. You can

  <a href=

  "http://www.rt-shop.sakura.ne.jp/rt-shop/index.php?main_page=product_info&products_id=2731&language=en">buy

  the hardware components</a> of the ADK if you do not already have them. There is also a <a href=

  "http://www.microchip.com/android">

  PIC based USB microcontroller</a> that is not based on the ADK design, but that you can still use

  to create your own Android open accessories. We expect more hardware distributers to create a

  variety of kits, so please stay tuned for further developments.</p>

  design files and firmware code are contained in the <a href=

  "https://dl-ssl.google.com/android/adk/adk_release_0512.zip">ADK package download</a>.</p>

  <p>The main hardware and software components of the ADK include:</p>

  <ul>

    how to setup communication with the device.</li>

    <li>Other third party libraries to support the ADK board's functionality:

      <ul>

        <li><a href="http://www.arduino.cc/playground/Main/CapSense">CapSense library</a></li>

        <li><a href="http://www.arduino.cc/playground/Code/Spi">Spi library</a></li>

        <li><a href="http://www.arduino.cc/en/Reference/Wire">Wire library</a></li>

      </ul>

    </li>

        <li>An Android application, DemoKit, that communicates with the ADK board and shield. The

        source for this project is in the <code>app/</code> directory.</li>

      </ul>

    </li>

  </ul>

  <h2 id="getting-started">Getting Started with the ADK</h2>

    libraries to sense human capacitance. This is needed for the capacative button that is located

    on the ADK shield.</li>

    <li><a href="">The ADK package</a>: contains the firmware for the ADK board and hardware design

    <li><a href="https://dl-ssl.google.com/android/adk/adk_release_0512.zip">The ADK package</a>: contains the firmware for the ADK board and hardware design

    files for the ADK board and shield.</li>

  </ul>

      otherwise.</p>

    </li>

    <li><a href="https://dl-ssl.google.com/android/adk/adk_release_0506.zip">Download</a> and

    <li><a href="https://dl-ssl.google.com/android/adk/adk_release_0512.zip">Download</a> and

    extract the ADK package to a directory of your choice. You should have an <code>app</code>,

    <code>firmware</code>, and <code>hardware</code> directories.</li>

  mode, the accessory cannot discern whether the device supports accessory mode and is not in that

  state, or if the device does not support accessory mode at all. This is because devices that

  support accessory mode but aren't in it initially report the device's manufacturer vendor ID and

  product ID, and not the special Google ones. In either case, the accessory should try to start

  product ID, and not the special Android Open Accessory ones. In either case, the accessory should try to start

  the device into accessory mode to figure out if the device supports it. The following steps

  explain how to do this:</p>