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<?xml-stylesheet type="text/xsl" href="https://community.arm.com/utility/feedstylesheets/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/"><channel><title>microphone test source</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/40152/microphone-test-source</link><description> 
i am need source for microphone whit lpc1768- 
can help me? 
 </description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: microphone test source</title><link>https://community.arm.com/thread/81120?ContentTypeID=1</link><pubDate>Sat, 06 Apr 2013 04:41:24 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:d8c11b35-2cbf-494c-85d6-681f24aa981b</guid><dc:creator>usef khodaparast</dc:creator><description>&lt;p&gt;&lt;p&gt;
tank&lt;br /&gt;
but i am not do it.&lt;br /&gt;
i am novice.&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: microphone test source</title><link>https://community.arm.com/thread/68199?ContentTypeID=1</link><pubDate>Sat, 06 Apr 2013 04:29:06 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:18d1c1ef-1fdf-434e-9da0-bceb6684fc5d</guid><dc:creator>ImPer Westermark</dc:creator><description>&lt;p&gt;&lt;p&gt;
Do you think there must be a special brand/model of microphone for
a LPC1768?&lt;/p&gt;

&lt;p&gt;
All you need is to get a signal level of suitable amplitude for
the LPC1768 ADC. And you need to DC-shift the signal to somewhere in
the middle of the ADC measurement range, since the ADC of the
microcontroller only samples positive voltages.&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>