http://www.instructables.com/id/The-...urce=slideshow
i don't know if this is a repost, but this is so cool.


watch the embedded video, for 50 bucks build a retina control open source device .


<object width="425" height="425" align="middle"> <param name="movie" value="http://www.instructables.com/static/flash/viewer.swf" /> <param name="quality" value="high" /> <param name="wmode" value="transparent" /> <param name="FlashVars" value="title=The-EyeWriter"> <embed src="http://www.instructables.com/static/flash/viewer.swf" quality="high" bgcolor="#ffffff" width="425" height="425" align="middle" allowScriptAccess="always" wmode="transparent" FlashVars="title=The-EyeWriter" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" /></object><br /><font size="1"><a href="http://www.instructables.com/id/The-EyeWriter/">The EyeWriter</a> - <a href="http://www.instructables.com/">More cool how to projects</a></font>