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<title>Jeff Epler's blog</title>
<modified>2009-11-10T16:00:26Z</modified>
<tagline>Photos, electronics, cnc, and more</tagline>
<author><name>Jeff Epler</name><email>jepler@unpythonic.net</email></author>
<entry>
<title>Arduino Random Number Generator</title>
<issued>2009-11-10T16:00:26Z</issued>
<modified>2009-11-10T16:00:26Z</modified>
<id>https://gamma.unpythonic.net/01257868826</id>
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<content type="text/html" mode="escaped">&lt;div style=&quot;float:right;clear:right&quot;&gt;&lt;!-- schematic.png--&gt;&lt;div class=albumouter style=width:306px id=&gt;&lt;div class=albumimage style=&quot;width:253px;margin-left:26.5px;&quot;&gt;&lt;a href=&quot;https://media.unpythonic.net/emergent-files/01257868826/schematic.png&quot; class=&quot;thickbox&quot; rel=&quot;album&quot; title=&quot;Random Number Generator Schematic&quot;&gt;&lt;img src=&quot;https://media.unpythonic.net/emergent-files/01257868826/schematic-small.jpg&quot; width=247 height=300&gt;&lt;/a&gt;&lt;div &gt;&lt;div style=&quot;float: right&quot; &gt;&lt;a href=&quot;https://media.unpythonic.net/emergent-files/01257868826/schematic.png&quot;&gt;&lt;img class=zoom src=&quot;https://media.unpythonic.net/emergent-files/default/zoom.png&quot;&gt;&lt;/a&gt;&lt;/div&gt;&lt;a href=&quot;https://media.unpythonic.net/emergent-files/01257868826/schematic.png&quot;&gt;Random Number Generator Schematic&lt;/a&gt;&lt;/div&gt;&lt;/div&gt;&lt;/div&gt;
&lt;/div&gt;
Inspired by other designs I've seen online, most directly &lt;a href=&quot;http://robseward.com/misc/RNG2/&quot;&gt;Rob Seward's design&lt;/a&gt;, I decided
to build my own random number generator based Will Ware's &amp;quot;avalanche noise in a
reverse-biased PN junction&amp;quot; (try &lt;a href=&quot;http://web.archive.org/web/20061117145903/http://willware.net:8080/hw-rng.html&quot;&gt;this mirror&lt;/a&gt; of &lt;a href=&quot;http://willware.net:8080/hw-rng.html&quot;&gt;Will Ware's page&lt;/a&gt;).  Also important is &lt;a href=&quot;http://www.av8n.com/turbid/paper/turbid.htm&quot;&gt;turbid&lt;/a&gt; which introduced me to the
concept of hash saturation and the math behind it.

&lt;p&gt;</content>
</entry>
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