At some point, you may wish to re-program your ClockTHREE or ClockTHREEjr or maybe you are building a clock from scratch.  This post will walk you through the steps.

Outline:
<ol>
	<li>Download and install Arduino for your target platform.  (More details can be found <a href="http://arduino.cc/en/Guide/HomePage">here</a>.)
<ul>
	<li>Navigate to the Arduino download site: http://arduino.cc/en/Main/Software</li>
	<li>Download Arduino for your platform.</li>
	<li> Unzip the file to the directory of your choice.  (We will refer to whatever directory you choose as &lt;arduino_dir&gt;).  I use c:\arduino\ on Windows or /home/justin/arduino/ on Linux so that (for arduino 22 for instance) the path extracted executable is c:\arduino\arduino-0022\arduino.exe on Windows or /home/justin/arduino/arduino-0022/arduino on Linux.</li>
</ul>
</li>
	<li>Download and install ClockTHREE source code
<ul>
	<li>Download the latest ClockTHREE library source code file from here: http://code.google.com/p/clockthree/downloads/list</li>
	<li>Unzip the library source code file in your home directory. I use "My Documents\sketechbook\" on windows and /home/justin/sketchbook/ on linux.  We will refer to the directory you choose as &lt;sketchbook&gt;.</li>
</ul>
</li>
	<li>Point Arduino to your newly extracted library files.
<ul>
	<li>Start arduino (look <a href="http://arduino.cc/en/Guide/HomePage">here</a> if you have trouble with this step)</li>
	<li>Click File-&gt;Preferences to pull up the preferences menu.</li>
	<li><a rel="attachment wp-att-329" href="http://wyolum.com/blog/?attachment_id=329"><img class="aligncenter size-large wp-image-329" title="arduino_prefs" src="http://wyolum.com/blog/wp-content/uploads/2011/07/arduino_prefs-650x578.png" alt="" width="450" height="400" /></a>Leave "Use external editor" unchecked if you plan on using Arduino as your editor.</li>
	<li>Click the "Browse" button and navigate to your &lt;sketchbook&gt; directory from step 2.</li>
	<li>Click "OK".</li>
	<li>Close and restart Arduino</li>
	<li>Click "File-&gt;Sketchbook-&gt;libraries".  If "ClockTHREE" is listed you've done well.<a rel="attachment wp-att-330" href="http://wyolum.com/blog/?attachment_id=330"></a><a rel="attachment wp-att-331" href="http://wyolum.com/blog/?attachment_id=331"><img class="aligncenter size-full wp-image-331" title="Arduino_menus" src="http://wyolum.com/blog/wp-content/uploads/2011/07/Arduino_menus1.png" alt="" width="386" height="449" /></a></li>
</ul>
</li>
	<li>Using a text editor, edit source code: set compile options and language
<ul>
	<li>On or about line 55 in the file &lt;sketchbook&gt;/libraries/ClockTHREE/ClockTHREE.h, uncomment (for ClockTHREEJr) or comment out (for ClockTHREE) the following line.</li>
</ul>
<pre>#define CLOCKTHREEJR // uncomment this line for ClockTHREEjr
</pre>
<ul>
	<li>On or about line 32 of &lt;sketchbook&gt;/libraries/ClockTHREE/examples/ClockTHREE_02.pde, comment out all but one of the following lines depending on language and hardware.</li>
</ul>
<pre>// #include "english.h" // only need one language at a time
// #include "german.h"
#include "english_jr.h"
// #include "german_jr.h"</pre>
<ul>
	<li>On or about line 292 of &lt;sketchbook&gt;/libraries/ClockTHREE/examples/ClockTHREE_02.pde, comment out all but one of the following lines depending on language and hardware.</li>
</ul>
<pre>
// English faceplate = English();      // Only need one at a time
// German faceplate = German();      
EnglishJr faceplate = EnglishJr();
// GermanJr faceplate = GermanJr();      
</pre>
</li>
	<li>Compile and upload &lt;sketchbook&gt;/libraries/ClockTHREE/examples/ClockTHREE_02.pde.<a rel="attachment wp-att-336" href="http://wyolum.com/blog/?attachment_id=336"><img class="aligncenter size-full wp-image-336" title="Screenshot-ClockTHREE_02 | Arduino 0022" src="http://wyolum.com/blog/wp-content/uploads/2011/07/Screenshot-ClockTHREE_02-Arduino-00221.png" alt="" width="300" height="342" /></a> Click the arrow button, second from the right.  Right when the black message area at the bottom of the Arduino window displays the message "Binary sketch size:..." click the reset button on ClockTHREE.  The timing can be tricky so you may have to experiment. <a rel="attachment wp-att-337" href="http://wyolum.com/blog/?attachment_id=337"><img class="aligncenter size-medium wp-image-337" title="Screenshot-ClockTHREE_02 | Arduino 0022-1" src="http://wyolum.com/blog/wp-content/uploads/2011/07/Screenshot-ClockTHREE_02-Arduino-0022-1-263x300.png" alt="" width="263" height="300" /></a></li>
	<li>Congratulations!  That is it.  Now you can customize the code to your hearts content!</li>
</ol>