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	<title>Comments on: Viewing PCB Gerber Files Before Manufacturing</title>
	<atom:link href="http://www.neufeld.newton.ks.us/electronics/?feed=rss2&#038;p=983" rel="self" type="application/rss+xml" />
	<link>http://www.neufeld.newton.ks.us/electronics/?p=983</link>
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		<title>By: Jon</title>
		<link>http://www.neufeld.newton.ks.us/electronics/?p=983&#038;cpage=1#comment-25059</link>
		<dc:creator>Jon</dc:creator>
		<pubDate>Mon, 10 May 2010 18:52:32 +0000</pubDate>
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		<description>I&#039;ve had some grief with the Sparkfun &quot;lock-in&quot; headers.  First, the center of the part is not in the center but is on one end.  If you rotate the part, the position moves wildly.

A potentially bigger problem is with the keyed single row headers.  Sparkfun&#039;s pin numbers are opposite of those by Molex (and presumably most other people).  I almost put my PIC ICSP connectors in backwards before I discovered this &quot;difference.&quot;

Jon</description>
		<content:encoded><![CDATA[<p>I&#8217;ve had some grief with the Sparkfun &#8220;lock-in&#8221; headers.  First, the center of the part is not in the center but is on one end.  If you rotate the part, the position moves wildly.</p>
<p>A potentially bigger problem is with the keyed single row headers.  Sparkfun&#8217;s pin numbers are opposite of those by Molex (and presumably most other people).  I almost put my PIC ICSP connectors in backwards before I discovered this &#8220;difference.&#8221;</p>
<p>Jon</p>
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		<title>By: Keith Neufeld</title>
		<link>http://www.neufeld.newton.ks.us/electronics/?p=983&#038;cpage=1#comment-25047</link>
		<dc:creator>Keith Neufeld</dc:creator>
		<pubDate>Sat, 08 May 2010 12:41:55 +0000</pubDate>
		<guid isPermaLink="false">http://www.neufeld.newton.ks.us/electronics/?p=983#comment-25047</guid>
		<description>Jeff, gerbv looks like a good option; thanks!  I&#039;d much rather go back and forth between my MacBook and my Linux workstation (which &lt;a href=&quot;?p=600&quot; rel=&quot;nofollow&quot;&gt;Unison-syncs with the MacBook&lt;/a&gt;) than my MacBook and a Windows machine (at the office).</description>
		<content:encoded><![CDATA[<p>Jeff, gerbv looks like a good option; thanks!  I&#8217;d much rather go back and forth between my MacBook and my Linux workstation (which <a href="?p=600" rel="nofollow">Unison-syncs with the MacBook</a>) than my MacBook and a Windows machine (at the office).</p>
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		<title>By: Jeff</title>
		<link>http://www.neufeld.newton.ks.us/electronics/?p=983&#038;cpage=1#comment-25044</link>
		<dc:creator>Jeff</dc:creator>
		<pubDate>Sat, 08 May 2010 05:21:45 +0000</pubDate>
		<guid isPermaLink="false">http://www.neufeld.newton.ks.us/electronics/?p=983#comment-25044</guid>
		<description>I use gerbv to review my gerbers - it always pays to double (and triple) check everything!

Regarding Sparkfun&#039;s libraries, I have found that while their libraries are helpful, they are rarely exactly what I want.  So I stopped using them.  Not only was I worried about their license terms, but it is faster and easier for me to draft my own footprints and symbols in Eagle than try to modify their existing ones.

I think if you do a survey of Eagle users, most serious users are creating their own footprints for all but the most common components.  That way you get to set up all of the layers just the way you want!  Most of the component libraries (especially surface mount parts) that ship with Eagle are pretty terrible anyway!</description>
		<content:encoded><![CDATA[<p>I use gerbv to review my gerbers &#8211; it always pays to double (and triple) check everything!</p>
<p>Regarding Sparkfun&#8217;s libraries, I have found that while their libraries are helpful, they are rarely exactly what I want.  So I stopped using them.  Not only was I worried about their license terms, but it is faster and easier for me to draft my own footprints and symbols in Eagle than try to modify their existing ones.</p>
<p>I think if you do a survey of Eagle users, most serious users are creating their own footprints for all but the most common components.  That way you get to set up all of the layers just the way you want!  Most of the component libraries (especially surface mount parts) that ship with Eagle are pretty terrible anyway!</p>
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		<title>By: Keith Neufeld</title>
		<link>http://www.neufeld.newton.ks.us/electronics/?p=983&#038;cpage=1#comment-25038</link>
		<dc:creator>Keith Neufeld</dc:creator>
		<pubDate>Fri, 07 May 2010 11:37:25 +0000</pubDate>
		<guid isPermaLink="false">http://www.neufeld.newton.ks.us/electronics/?p=983#comment-25038</guid>
		<description>AAARGH.

And the bug exists on my schematic as well, which I know it didn&#039;t used to.  Probably introduced it when I was rotating the SMT resistors to make their values read in the &quot;right&quot; orientation in eagle3d.  That&#039;ll teach me!

I &lt;em&gt;have&lt;/em&gt; submitted the boards already and I&#039;ve now emailed them to ask whether I&#039;m too late to change.  Thank you!

Thanks for the catch!</description>
		<content:encoded><![CDATA[<p>AAARGH.</p>
<p>And the bug exists on my schematic as well, which I know it didn&#8217;t used to.  Probably introduced it when I was rotating the SMT resistors to make their values read in the &#8220;right&#8221; orientation in eagle3d.  That&#8217;ll teach me!</p>
<p>I <em>have</em> submitted the boards already and I&#8217;ve now emailed them to ask whether I&#8217;m too late to change.  Thank you!</p>
<p>Thanks for the catch!</p>
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		<title>By: Asm</title>
		<link>http://www.neufeld.newton.ks.us/electronics/?p=983&#038;cpage=1#comment-25036</link>
		<dc:creator>Asm</dc:creator>
		<pubDate>Fri, 07 May 2010 08:45:11 +0000</pubDate>
		<guid isPermaLink="false">http://www.neufeld.newton.ks.us/electronics/?p=983#comment-25036</guid>
		<description>Ah.

You do have a bit of a bug on your boards; I hope you didn&#039;t submit them to manufacturing yet. 

The third SMD current sense resistor is not properly connected to its TH version - one of the legs is floating.</description>
		<content:encoded><![CDATA[<p>Ah.</p>
<p>You do have a bit of a bug on your boards; I hope you didn&#8217;t submit them to manufacturing yet. </p>
<p>The third SMD current sense resistor is not properly connected to its TH version &#8211; one of the legs is floating.</p>
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