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	<title>The Mind of Bill Porter</title>
	<link>http://www.billporter.info</link>
	<description>Blog of Projects and Thoughts</description>
	<lastBuildDate>Sun, 29 Aug 2010 18:46:30 +0000</lastBuildDate>
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		<title>Ready, Set, Oscillate! The Fastest Way to Change Arduino Pins</title>
		<description><![CDATA[
There are many ways to change an output pin. The way we know and love is the famous digitalWrite() function.
But even the Arduino Reference claims that it is not the most efficient. The Arduino functions do a lot of error checking to make sure the pin is configured right and has to map Arduino numbering [...]]]></description>
		<link>http://www.billporter.info/?p=308</link>
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		<title>SAGAR Update, New Motor Controller and Motors</title>
		<description><![CDATA[ Hey Guys,
It&#8217;s been a while since I posted an update on SAGAR, but here&#8217;s the latest.
I wanted her to go faster. My original motors would only do about 1.2 m/s tops. Well, with a little help from a friend, I found new motors that would bring up the top speed to well over 3 [...]]]></description>
		<link>http://www.billporter.info/?p=286</link>
			</item>
	<item>
		<title>Getting Data BACK From Google Earth and Into LabView</title>
		<description><![CDATA[I wanted to be able to get information back from Google Earth. It&#8217;s already easy to plot information on Google Earth, but getting information back, like the GPS coordinates under the mouse pointer, was another story. Well, I slaved myself to my desk for a few days and figured it out. I created a sample [...]]]></description>
		<link>http://www.billporter.info/?p=268</link>
			</item>
	<item>
		<title>PlayStation 2 Controller Arduino Library v1.0</title>
		<description><![CDATA[The first fully working version (v1.0) is now available. I split this into a new blog post, as many things have changed.
The big change is you can now define what pins of the Arduino are used, no longer are you tied to pins 10-13.
Also, vibration (Rumble) and analog button pressure readings (how hard is a [...]]]></description>
		<link>http://www.billporter.info/?p=240</link>
			</item>
	<item>
		<title>OLD PlayStation 2 Controller Arduino Library</title>
		<description><![CDATA[
Outdated. Go to new library HERE
A while ago, I spent countless days trying to interface an Arduino and a Play Station 2 controller. I wanted to build a controller for my SAGAR robot, and figured PS2 + Arduino would be perfect. However, no matter what I did, no existing library would work for me. I [...]]]></description>
		<link>http://www.billporter.info/?p=219</link>
			</item>
	<item>
		<title>The Trouble With Communications.</title>
		<description><![CDATA[A person has already come to me asking how to interface an Axon Microcontroller to LabView. Instead of a bland answer to the effect of “It’s nothing special”, I decided to write a quick write-up about communications between computer systems; and I will use the communication between my SAGAR robot and LabView operator panel as [...]]]></description>
		<link>http://www.billporter.info/?p=214</link>
			</item>
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		<title>SAGAR System Overview, Part 1</title>
		<description><![CDATA[My SAGAR project has gotten to a point where I would like to document the system design through a series of detailed posts.
First I&#8217;ll show the new interface, and talk about how it  communicates with SAGAR.
Here  is a video of the new interface, with an inset of SAGAR as it runs the  [...]]]></description>
		<link>http://www.billporter.info/?p=202</link>
			</item>
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		<title>SAGAR Update!! Mission Mode with LabView Panel</title>
		<description><![CDATA[In a joint effort between my girlfriend and I, SAGAR now has a super fancy LabView based graphical user interface. The video below is a screen capture of the interface as SAGAR runs a mission taking it around a parking lot. All communications are in the form of NMEA sentences. The DIYdrones ground station gave [...]]]></description>
		<link>http://www.billporter.info/?p=195</link>
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		<title>S.A.G.A.R. update &#8211; IT&#8217;S ALIVE!!!!</title>
		<description><![CDATA[Ok, so I&#8217;m a little overexcited. I just got back from watching SAGAR complete it&#8217;s first autonomous mission. I just finished coding the navigation functions and couldn&#8217;t wait till the next day to test. Attached is an image of the mission it ran.
I used a Ardupilot program to generate the mission file with waypoints, convert [...]]]></description>
		<link>http://www.billporter.info/?p=192</link>
			</item>
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		<title>S.A.G.A.R. Update, Compass Woes</title>
		<description><![CDATA[I have been asked by a few people how SAGAR is going, so I guess I need to do some updates more often. Anyway, SAGAR was shelved for a while. The last tests of the closed loop heading controller showed I had something messing with the compass readings. Further tests concluded that my batteries were [...]]]></description>
		<link>http://www.billporter.info/?p=174</link>
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