<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="7.1.0">
<drawing>
<board>
<plain>
<text>FTDI</text>
<text>BLK</text>
<text>REG</text>
<text>GRN</text>
<hole x="3.175" y="3.175" drill="3.2"/>
<hole x="46.355" y="3.175" drill="3.2"/>
<hole x="3.175" y="46.355" drill="3.2"/>
<wire x1="0" y1="3.175" x2="0" y2="46.355" width="0.0254" layer="20"/>
<wire x1="3.175" y1="49.53" x2="46.355" y2="49.53" width="0.0254" layer="20"/>
<wire x1="49.53" y1="46.355" x2="49.53" y2="3.175" width="0.0254" layer="20"/>
<text>SoundMeter1.1
July 2015</text>
<text>SoundMeter
Richard Hawthorn
Cambridge Hackspace
cambridgehackspace.com</text>
<hole x="46.355" y="46.355" drill="3.2"/>
<wire x1="46.355" y1="0" x2="3.175" y2="0" width="0.0254" layer="20"/>
<wire x1="0" y1="46.355" x2="3.175" y2="49.53" width="0.0254" layer="20" curve="-90"/>
<wire x1="46.355" y1="49.53" x2="49.53" y2="46.355" width="0.0254" layer="20" curve="-90"/>
<wire x1="49.53" y1="3.175" x2="46.355" y2="0" width="0.0254" layer="20" curve="-90"/>
<wire x1="3.175" y1="0" x2="0" y2="3.175" width="0.0254" layer="20" curve="-90"/>
</plain>
<libraries>
<library name="LowPowerLab">
<packages>
<package name="CAP-PTH-SMALL2">
</package>
</packages>
</library>
<library name="SparkFun-Aesthetics">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find non-functional items- supply symbols, logos, notations, frame blocks, etc.&lt;br&gt;&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com.
&lt;br&gt;&lt;br&gt;
&lt;b&gt;Licensing:&lt;/b&gt; CC v3.0 Share-Alike You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage.</description>
<packages>
<package name="OSHW-LOGO-S">
</package>
</packages>
</library>
<library name="pinhead">
<description>&lt;b&gt;Pin Header Connectors&lt;/b&gt;&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="1X06">
<description>&lt;b&gt;PIN HEADER&lt;/b&gt;</description>
</package>
<package name="2X03">
<description>&lt;b&gt;PIN HEADER&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="adafruit">
<packages>
<package name="0204/7">
<description>&lt;b&gt;RESISTOR&lt;/b&gt;&lt;p&gt;
type 0204, grid 7.5 mm</description>
</package>
<package name="C025-025X050">
<description>&lt;b&gt;CAPACITOR&lt;/b&gt;&lt;p&gt;
grid 2.5 mm, outline 2.5 x 5 mm</description>
</package>
<package name="DIL28-3-ROUND">
</package>
</packages>
</library>
<library name="crystal">
<description>&lt;b&gt;Crystals and Crystal Resonators&lt;/b&gt;&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="HC49U">
<description>&lt;b&gt;Crystal Filter&lt;/b&gt;&lt;p&gt;
Source: www.ilsiamerica.com .. C1 IXF Series.pdf</description>
</package>
</packages>
</library>
<library name="microbuilder">
<packages>
<package name="SEGMENT_BICOL_BL-M12A883XX">
<description>&lt;b&gt;Source: &lt;/b&gt;http://www.betlux.com/product/led_dot_matrix/BL-M12A883xx.PDF</description>
</package>
<package name="SOP28_300MIL">
</package>
</packages>
</library>
<library name="con-cypressindustries">
<description>&lt;b&gt;Connectors from Cypress Industries&lt;/b&gt;&lt;p&gt;
www.cypressindustries.com&lt;br&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="32005-601">
<description>&lt;b&gt;MINI USB-B R/A DIP&lt;/b&gt;&lt;p&gt;
Source: http://www.cypressindustries.com/pdf/32005-601.pdf</description>
</package>
</packages>
</library>
<library name="Richards">
<description>My Library</description>
<packages>
<package name="DIL08">
<description>&lt;b&gt;Dual In Line Package&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="SparkFun-Sensors">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find sensors- accelerometers, gyros, compasses, magnetometers, light sensors, imagers, temp sensors, etc.&lt;br&gt;&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is the end user's responsibility to ensure correctness and suitablity for a given componet or application. If you enjoy using this library, please buy one of our products at www.sparkfun.com.
&lt;br&gt;&lt;br&gt;
&lt;b&gt;Licensing:&lt;/b&gt; Creative Commons ShareAlike 4.0 International - https://creativecommons.org/licenses/by-sa/4.0/ 
&lt;br&gt;&lt;br&gt;
You are welcome to use this library for commercial purposes. For attribution, we ask that when you begin to sell your device using our footprint, you email us with a link to the product being sold. We want bragging rights that we helped (in a very small part) to create your 8th world wonder. We would like the opportunity to feature your device on our homepage.</description>
<packages>
<package name="MIC-9.7MM">
</package>
</packages>
</library>
<library name="burr-brown">
<description>&lt;b&gt;Burr-Brown Components&lt;/b&gt;&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="SOT223">
<description>&lt;b&gt;Smal Outline Transistor&lt;/b&gt;</description>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
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<element name="C1" library="LowPowerLab" package="CAP-PTH-SMALL2" value="0.1">
<attribute name="NAME"/>
</element>
<element name="U$3" library="SparkFun-Aesthetics" package="OSHW-LOGO-S" value=""/>
<element name="CN4" library="pinhead" package="1X06" value="FTDI"/>
<element name="ICSP1" library="pinhead" package="2X03" value="ICSP">
<attribute name="VALUE"/>
</element>
<element name="R2" library="adafruit" package="0204/7" value="10K">
<attribute name="NAME"/>
</element>
<element name="R3" library="adafruit" package="0204/7" value="10K">
<attribute name="NAME"/>
</element>
<element name="C2" library="adafruit" package="C025-025X050" value="0.1uF">
<attribute name="NAME"/>
</element>
<element name="IC1" library="adafruit" package="DIL28-3-ROUND" value="ATMEGA">
<attribute name="NAME"/>
</element>
<element name="R1" library="adafruit" package="0204/7" value="10K">
<attribute name="NAME"/>
</element>
<element name="C4" library="LowPowerLab" package="CAP-PTH-SMALL2" value="0.1">
<attribute name="NAME"/>
</element>
<element name="QF1" library="crystal" package="HC49U" value="8M10AHC49T">
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="MPN" value=""/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
<attribute name="NAME"/>
</element>
<element name="LED1" library="microbuilder" package="SEGMENT_BICOL_BL-M12A883XX" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="IC3" library="microbuilder" package="SOP28_300MIL" value="28-SOIC">
<attribute name="NAME"/>
</element>
<element name="X1" library="con-cypressindustries" package="32005-601" value="USB">
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="MPN" value=""/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
<attribute name="VALUE"/>
</element>
<element name="IC2" library="Richards" package="DIL08" value="OPA344">
<attribute name="NAME"/>
</element>
<element name="C6" library="LowPowerLab" package="CAP-PTH-SMALL2" value="4.7uf">
<attribute name="NAME"/>
</element>
<element name="R5" library="adafruit" package="0204/7" value="10k">
<attribute name="NAME"/>
</element>
<element name="U$6" library="SparkFun-Sensors" package="MIC-9.7MM" value="MIC9.7MM">
<attribute name="PROD_ID" value="COMP-08856"/>
</element>
<element name="R4" library="adafruit" package="0204/7" value="2k2">
<attribute name="NAME"/>
</element>
<element name="R7" library="adafruit" package="0204/7" value="10K">
<attribute name="NAME"/>
</element>
<element name="R8" library="adafruit" package="0204/7" value="10K">
<attribute name="NAME"/>
</element>
<element name="C7" library="LowPowerLab" package="CAP-PTH-SMALL2" value="1uf">
<attribute name="NAME"/>
</element>
<element name="R6" library="adafruit" package="0204/7" value="1M">
<attribute name="NAME"/>
</element>
<element name="C8" library="LowPowerLab" package="CAP-PTH-SMALL2" value="12pf">
<attribute name="NAME"/>
</element>
<element name="C5" library="LowPowerLab" package="CAP-PTH-SMALL2" value="0.1">
<attribute name="NAME"/>
</element>
<element name="U5" library="burr-brown" package="SOT223" value="REG1117">
<attribute name="OC_NEWARK" value="14P6981"/>
<attribute name="MPN" value="REG1117"/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="1097566"/>
<attribute name="NAME"/>
</element>
<element name="C3" library="LowPowerLab" package="CAP-PTH-SMALL2" value="10uf">
<attribute name="NAME"/>
</element>
</elements>
<signals>
<signal name="GND">
<contactref element="CN4" pad="1"/>
<contactref element="ICSP1" pad="6"/>
<contactref element="IC1" pad="8"/>
<contactref element="IC1" pad="22"/>
<contactref element="C4" pad="2"/>
<contactref element="QF1" pad="2"/>
<contactref element="IC3" pad="P$1"/>
<contactref element="C2" pad="2"/>
<contactref element="IC2" pad="4"/>
<contactref element="C5" pad="2"/>
<contactref element="U$6" pad="2"/>
<contactref element="U5" pad="1"/>
<contactref element="C3" pad="2"/>
<contactref element="X1" pad="5"/>
<contactref element="C7" pad="1"/>
<contactref element="R8" pad="2"/>
</signal>
<signal name="D10_SS">
<contactref element="IC1" pad="16"/>
</signal>
<signal name="RST">
<contactref element="C1" pad="1"/>
<contactref element="ICSP1" pad="5"/>
<contactref element="R1" pad="1"/>
<contactref element="IC1" pad="1"/>
</signal>
<signal name="N$20">
<contactref element="C1" pad="2"/>
<contactref element="CN4" pad="6"/>
</signal>
<signal name="D9">
<contactref element="IC1" pad="15"/>
</signal>
<signal name="D8">
<contactref element="IC1" pad="14"/>
</signal>
<signal name="D6">
<contactref element="IC1" pad="12"/>
</signal>
<signal name="D5">
<contactref element="IC1" pad="11"/>
</signal>
<signal name="D4">
<contactref element="IC1" pad="6"/>
</signal>
<signal name="D3">
<contactref element="IC1" pad="5"/>
</signal>
<signal name="D1_TX">
<contactref element="CN4" pad="5"/>
<contactref element="IC1" pad="3"/>
</signal>
<signal name="D0_RX">
<contactref element="CN4" pad="4"/>
<contactref element="IC1" pad="2"/>
</signal>
<signal name="A4_SDA">
<contactref element="IC1" pad="27"/>
<contactref element="R3" pad="1"/>
<contactref element="IC3" pad="P$27"/>
</signal>
<signal name="A3">
<contactref element="IC1" pad="26"/>
</signal>
<signal name="A2">
<contactref element="IC1" pad="25"/>
</signal>
<signal name="A1">
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</signal>
<signal name="A0">
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<contactref element="IC2" pad="6"/>
<contactref element="C8" pad="2"/>
<contactref element="R6" pad="2"/>
</signal>
<signal name="D2">
<contactref element="IC1" pad="4"/>
</signal>
<signal name="D11_MOSI">
<contactref element="ICSP1" pad="4"/>
<contactref element="IC1" pad="17"/>
</signal>
<signal name="D12_MISO">
<contactref element="ICSP1" pad="1"/>
<contactref element="IC1" pad="18"/>
</signal>
<signal name="D13_SCK">
<contactref element="ICSP1" pad="3"/>
<contactref element="IC1" pad="19"/>
</signal>
<signal name="A5_SCL">
<contactref element="IC1" pad="28"/>
<contactref element="R2" pad="1"/>
<contactref element="IC3" pad="P$26"/>
</signal>
<signal name="D7">
<contactref element="IC1" pad="13"/>
</signal>
<signal name="5V">
<contactref element="ICSP1" pad="2"/>
<contactref element="IC1" pad="7"/>
<contactref element="R1" pad="2"/>
<contactref element="R2" pad="2"/>
<contactref element="R3" pad="2"/>
<contactref element="IC1" pad="20"/>
<contactref element="CN4" pad="3"/>
<contactref element="C4" pad="1"/>
<contactref element="IC3" pad="P$28"/>
<contactref element="C2" pad="1"/>
<contactref element="U5" pad="3"/>
<contactref element="C3" pad="1"/>
<contactref element="X1" pad="1"/>
</signal>
<signal name="N$16">
<contactref element="IC1" pad="9"/>
<contactref element="QF1" pad="1"/>
</signal>
<signal name="N$26">
<contactref element="IC1" pad="10"/>
<contactref element="QF1" pad="3"/>
</signal>
<signal name="COM">
<contactref element="LED1" pad="22"/>
<contactref element="IC3" pad="P$2"/>
</signal>
<signal name="ADD2">
<contactref element="IC3" pad="P$25"/>
<contactref element="LED1" pad="24"/>
</signal>
<signal name="ADD1">
<contactref element="IC3" pad="P$24"/>
<contactref element="LED1" pad="21"/>
</signal>
<signal name="ADD0">
<contactref element="IC3" pad="P$23"/>
<contactref element="LED1" pad="18"/>
</signal>
<signal name="N$2">
<contactref element="LED1" pad="12"/>
<contactref element="IC3" pad="P$9"/>
</signal>
<signal name="N$4">
<contactref element="LED1" pad="9"/>
<contactref element="IC3" pad="P$8"/>
</signal>
<signal name="N$7">
<contactref element="LED1" pad="6"/>
<contactref element="IC3" pad="P$7"/>
</signal>
<signal name="N$8">
<contactref element="LED1" pad="3"/>
<contactref element="IC3" pad="P$6"/>
</signal>
<signal name="N$9">
<contactref element="LED1" pad="13"/>
<contactref element="IC3" pad="P$5"/>
</signal>
<signal name="N$10">
<contactref element="LED1" pad="16"/>
<contactref element="IC3" pad="P$4"/>
</signal>
<signal name="N$11">
<contactref element="LED1" pad="19"/>
<contactref element="IC3" pad="P$3"/>
</signal>
<signal name="N$14">
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<contactref element="LED1" pad="8"/>
</signal>
<signal name="N$15">
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<contactref element="LED1" pad="5"/>
</signal>
<signal name="N$21">
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</signal>
<signal name="N$23">
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<contactref element="LED1" pad="7"/>
</signal>
<signal name="N$27">
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<contactref element="LED1" pad="1"/>
</signal>
<signal name="N$28">
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</signal>
<signal name="N$35">
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</signal>
<signal name="N$38">
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</signal>
<signal name="N$39">
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</signal>
<signal name="N$40">
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<contactref element="LED1" pad="14"/>
</signal>
<signal name="N$41">
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</signal>
<signal name="N$42">
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<contactref element="LED1" pad="2"/>
</signal>
<signal name="N$31">
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<contactref element="LED1" pad="11"/>
</signal>
<signal name="N$1">
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<contactref element="R5" pad="2"/>
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<signal name="N$5">
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<contactref element="R4" pad="1"/>
<contactref element="U$6" pad="1"/>
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<signal name="N$6">
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<contactref element="R8" pad="1"/>
<contactref element="R7" pad="2"/>
<contactref element="IC2" pad="3"/>
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<contactref element="R6" pad="1"/>
<contactref element="R5" pad="1"/>
<contactref element="IC2" pad="2"/>
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<signal name="3.3V">
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<contactref element="R4" pad="2"/>
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<contactref element="IC1" pad="21"/>
<contactref element="IC2" pad="7"/>
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</signals>
</board>
</drawing>
</eagle>
