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	<title>I.D.E.A. &#187; Physical Computing</title>
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	<description>Inspirations, Dreams, Explorations, Addictions</description>
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		<title>Eagle and Gerber Files (easier!)</title>
		<link>http://www.2-bit-toys.com/2006/02/06/eagle-and-gerber-files-easier/</link>
		<comments>http://www.2-bit-toys.com/2006/02/06/eagle-and-gerber-files-easier/#comments</comments>
		<pubDate>Mon, 06 Feb 2006 22:15:28 +0000</pubDate>
		<dc:creator>James</dc:creator>
				<category><![CDATA[PCBs]]></category>
		<category><![CDATA[Physical Computing]]></category>

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		<description><![CDATA[I&#8217;ve been doing a little more experimentation with EAGLE and the included .cam files.  I found that these should be more than sufficient for my needs (two-layer PCB, top and bottom soldermask, top and bottom solder stop and top silkscreen.)  I just processed the ger274x.cam and the excellon.cam job files, uploaded my design [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>Eagle and Gerber Files</title>
		<link>http://www.2-bit-toys.com/2006/01/31/generating-gerber-files-in-eagle/</link>
		<comments>http://www.2-bit-toys.com/2006/01/31/generating-gerber-files-in-eagle/#comments</comments>
		<pubDate>Tue, 31 Jan 2006 05:45:44 +0000</pubDate>
		<dc:creator>James</dc:creator>
				<category><![CDATA[PCBs]]></category>
		<category><![CDATA[Physical Computing]]></category>

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		<description><![CDATA[Addendum:
We submitted the files to pcbexpress and they said that the .drl file was not the NC drill file.  I had to run the excellon.cam job file to generate the .drd file.
Recently I had to use Eagle to adjust a colleague&#8217;s PCB layout.  To install it on a Mac, first download and install [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
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		<title>DIY USB Charger</title>
		<link>http://www.2-bit-toys.com/2006/01/20/diy-usb-charger/</link>
		<comments>http://www.2-bit-toys.com/2006/01/20/diy-usb-charger/#comments</comments>
		<pubDate>Fri, 20 Jan 2006 23:49:40 +0000</pubDate>
		<dc:creator>James</dc:creator>
				<category><![CDATA[Physical Computing]]></category>

		<guid isPermaLink="false">http://www.2-bit-toys.com/wordpress/?p=30</guid>
		<description><![CDATA[Rachel wanted an external charger to charge up her iPod nano but Apple sells iPod one for $30!  I wanted to see if I can cook something with the stuff in my miscellaneous electronics closet.
Disclaimer: This info is provided with no guarantees.  If you don&#8217;t know what you&#8217;re doing, do not try to [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>PIC Timer Interrupts</title>
		<link>http://www.2-bit-toys.com/2005/10/14/pic-timer-interrupts/</link>
		<comments>http://www.2-bit-toys.com/2005/10/14/pic-timer-interrupts/#comments</comments>
		<pubDate>Fri, 14 Oct 2005 19:00:42 +0000</pubDate>
		<dc:creator>James</dc:creator>
				<category><![CDATA[PIC]]></category>
		<category><![CDATA[Physical Computing]]></category>

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		<description><![CDATA[Here&#8217;s a very basic program to use TMR0 and an interrupt for TMR0 to do something every second.
I&#8217;m using a 4Mhz clock.
We are setting up the PIC so that everytime TMR0 reaches it&#8217;s max value(this is configurable), a Timer Interrupt occurs.

----------------------------------------------------------------------------------------

'Works w/ 18Fxx2 - James Tu 06/01/2004

'This program sets up a TMR0 interrupt
'The interrupt happens [...]]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>&#8220;Open-collector&#8221;, &#8220;Open-drain&#8221; demystified</title>
		<link>http://www.2-bit-toys.com/2005/10/14/open-collector-open-drain-demystified/</link>
		<comments>http://www.2-bit-toys.com/2005/10/14/open-collector-open-drain-demystified/#comments</comments>
		<pubDate>Fri, 14 Oct 2005 18:35:54 +0000</pubDate>
		<dc:creator>James</dc:creator>
				<category><![CDATA[ICs & Controller Boards]]></category>
		<category><![CDATA[PIC]]></category>

		<guid isPermaLink="false">http://2-bit-toys.com/wordpress/?p=16</guid>
		<description><![CDATA[You&#8217;ll come across the terms &#8220;open-collector&#8221; and &#8220;open-drain.&#8221; These are used sometimes to describe how a particular IC&#8217;s pins are implemented internally. 
This and also this are good explanations of what those terms actually mean and why an IC&#8217;s pin would be designed as open-collector or open-drain.
]]></description>
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