<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="7.4.0">
<drawing>
<board>
<plain>
<wire x1="0" y1="0" x2="91.42" y2="0" width="0" layer="20"/>
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<libraries>
<library name="SparkFun-Connectors">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find connectors and sockets- basically anything that can be plugged into or onto.&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="BC9VPC">
</package>
<package name="AUDIO-JACK">
</package>
<package name="AUDIO-JACK-.25-INCH-HORIZ-PTH">
</package>
</packages>
</library>
<library name="SparkFun-Capacitors">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find resistors, capacitors, inductors, test points, jumper pads, 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="0805">
</package>
<package name="CPOL-RADIAL-100UF-25V">
</package>
</packages>
</library>
<library name="SparkFun-DiscreteSemi">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find discrete semiconductors- transistors, diodes, TRIACs, optoisolators, 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="SOD-123">
<description>100V/150mA 1N4148 - Super Cheap</description>
</package>
</packages>
</library>
<library name="SparkFun-LED">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find discrete LEDs for illumination or indication, but no displays.&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="LED3MM">
<description>&lt;B&gt;LED&lt;/B&gt;&lt;p&gt;
3 mm, round</description>
</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="DIL08">
<description>&lt;b&gt;Dual In Line&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="linear">
<description>&lt;b&gt;Linear Devices&lt;/b&gt;&lt;p&gt;
Operational amplifiers,  comparators, voltage regulators, ADCs, DACs, etc.&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="SO14">
<description>&lt;b&gt;Small Outline Package 14&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="con-neutrik_ag">
<description>&lt;b&gt;NEUTRIK Connectors &lt;/b&gt;&lt;p&gt;
http://www.neutrik.com/</description>
<packages>
<package name="NCJ10FI-H-0">
<description>&lt;b&gt;Neutrik Audio Connector&lt;/b&gt;&lt;p&gt;
combo, 3-pole, female, XLR/switching ground stereo 1/4" jack&lt;br&gt;
Source: www.neutrik.com/...210_263081.pdf</description>
</package>
</packages>
</library>
<library name="SparkFun-Resistors">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find resistors, capacitors, inductors, test points, jumper pads, 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="0603-RES">
</package>
</packages>
</library>
<library name="SparkFun-Electromechanical">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find anything that moves- switches, relays, buttons, potentiometers. Also, anything that goes on a board but isn't electrical in nature- screws, standoffs, 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="SWITCH-SPDT">
</package>
<package name="STAND-OFF">
<description>&lt;b&gt;Stand Off&lt;/b&gt;&lt;p&gt;
This is the mechanical footprint for a #4 phillips button head screw. Use the keepout ring to avoid running the screw head into surrounding components. SKU : PRT-00447</description>
</package>
</packages>
</library>
<library name="tle2426">
<packages>
<package name="TO226AA">
<description>TO-226AA</description>
</package>
</packages>
</library>
<library name="monowave-pot">
<description>Potentiometers</description>
<packages>
<package name="POT-SIDE-16MM-BITECH-P160KN">
<description>Potentiometer, 1.3mm drill, 5mm lead spacing, BI Technologies P160KN</description>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="BAT1" library="SparkFun-Connectors" package="BC9VPC" value="">
<attribute name="PROD_ID" value="BATT-10855"/>
</element>
<element name="C1" library="SparkFun-Capacitors" package="0805" value="1u"/>
<element name="C2" library="SparkFun-Capacitors" package="0805" value="1u"/>
<element name="C3" library="SparkFun-Capacitors" package="0805" value=""/>
<element name="C4" library="SparkFun-Capacitors" package="0805" value=""/>
<element name="C5" library="SparkFun-Capacitors" package="CPOL-RADIAL-100UF-25V" value=""/>
<element name="D1" library="SparkFun-DiscreteSemi" package="SOD-123" value=""/>
<element name="D2" library="SparkFun-LED" package="LED3MM" value=""/>
<element name="IC1" library="burr-brown" package="DIL08" value="INA217P">
<attribute name="MPN" value="INA217AIP"/>
<attribute name="MF" value="TEXAS INSTRUMENTS"/>
<attribute name="OC_FARNELL" value="1212423"/>
<attribute name="OC_NEWARK" value="74C9859"/>
</element>
<element name="IC2" library="linear" package="SO14" value="OPA4227D"/>
<element name="IN" library="con-neutrik_ag" package="NCJ10FI-H-0" value="">
<attribute name="MPN" value="NCJ10FI-H-0"/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
<attribute name="OC_NEWARK" value="99B1398"/>
</element>
<element name="OUT1" library="SparkFun-Connectors" package="AUDIO-JACK" value=""/>
<element name="OUT2" library="SparkFun-Connectors" package="AUDIO-JACK-.25-INCH-HORIZ-PTH" value="">
<attribute name="PROD_ID" value="COM-11144"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R2" library="SparkFun-Resistors" package="0603-RES" value="10"/>
<element name="R3" library="SparkFun-Resistors" package="0603-RES" value="2.2K"/>
<element name="R4" library="SparkFun-Resistors" package="0603-RES" value="2.2K"/>
<element name="R5" library="SparkFun-Resistors" package="0603-RES" value="1.5K"/>
<element name="S1" library="SparkFun-Electromechanical" package="SWITCH-SPDT" value="">
<attribute name="PROD_ID" value="SWCH-08261"/>
</element>
<element name="TLV" library="tle2426" package="TO226AA" value=""/>
<element name="STANDOFF1" library="SparkFun-Electromechanical" package="STAND-OFF" value="STAND-OFF"/>
<element name="STANDOFF2" library="SparkFun-Electromechanical" package="STAND-OFF" value="STAND-OFF"/>
<element name="STANDOFF3" library="SparkFun-Electromechanical" package="STAND-OFF" value="STAND-OFF"/>
<element name="R6" library="monowave-pot" package="POT-SIDE-16MM-BITECH-P160KN" value="">
<attribute name="PERCENT" value="50"/>
<attribute name="SPICE" value="R{NAME}CW {3.NET} {2.NET} {{{VALUE} - {{{ATTR.PERCENT} / 100} * {VALUE}}} + 0.001}\nR{NAME}CCW {2.NET} {1.NET} {{{{ATTR.PERCENT} / 100} * {VALUE}} + 0.001}"/>
</element>
</elements>
<signals>
<signal name="N$4">
<contactref element="R2" pad="2"/>
<contactref element="IC1" pad="1"/>
</signal>
<signal name="GND">
<contactref element="C2" pad="2"/>
<contactref element="C1" pad="1"/>
<contactref element="IN" pad="1"/>
<contactref element="IC1" pad="5"/>
<contactref element="C3" pad="1"/>
<contactref element="C4" pad="2"/>
<contactref element="OUT1" pad="SLEEVE"/>
<contactref element="OUT2" pad="SLEEVE"/>
<contactref element="R3" pad="1"/>
<contactref element="R4" pad="1"/>
<contactref element="TLV" pad="1"/>
</signal>
<signal name="N$8">
<contactref element="IN" pad="2"/>
<contactref element="IC1" pad="2"/>
<contactref element="R3" pad="2"/>
</signal>
<signal name="N$9">
<contactref element="IN" pad="3"/>
<contactref element="IC1" pad="3"/>
<contactref element="R4" pad="2"/>
</signal>
<signal name="VDD">
<contactref element="IC1" pad="4"/>
<contactref element="C2" pad="1"/>
<contactref element="IC2" pad="11"/>
<contactref element="C4" pad="1"/>
<contactref element="BAT1" pad="V-"/>
<contactref element="C5" pad="2"/>
<contactref element="TLV" pad="2"/>
<contactref element="D2" pad="K"/>
</signal>
<signal name="VCC">
<contactref element="IC1" pad="7"/>
<contactref element="C1" pad="2"/>
<contactref element="IC2" pad="4"/>
<contactref element="C3" pad="2"/>
<contactref element="D1" pad="C"/>
<contactref element="C5" pad="1"/>
<contactref element="TLV" pad="3"/>
<contactref element="R5" pad="2"/>
</signal>
<signal name="N$12">
<contactref element="IC2" pad="1"/>
<contactref element="OUT1" pad="TIP"/>
<contactref element="IC2" pad="2"/>
</signal>
<signal name="N$13">
<contactref element="IC2" pad="8"/>
<contactref element="OUT1" pad="RING"/>
<contactref element="IC2" pad="9"/>
</signal>
<signal name="N$14">
<contactref element="IC2" pad="7"/>
<contactref element="OUT2" pad="RING"/>
<contactref element="IC2" pad="6"/>
</signal>
<signal name="N$15">
<contactref element="IC2" pad="14"/>
<contactref element="OUT2" pad="TIP"/>
<contactref element="IC2" pad="13"/>
</signal>
<signal name="N$16">
<contactref element="IC1" pad="6"/>
<contactref element="IC2" pad="3"/>
<contactref element="IC2" pad="10"/>
<contactref element="IC2" pad="5"/>
<contactref element="IC2" pad="12"/>
</signal>
<signal name="N$17">
<contactref element="S1" pad="2"/>
<contactref element="BAT1" pad="V+"/>
</signal>
<signal name="N$18">
<contactref element="S1" pad="1"/>
<contactref element="D1" pad="A"/>
</signal>
<signal name="N$6">
<contactref element="D2" pad="A"/>
<contactref element="R5" pad="1"/>
</signal>
<signal name="N$1">
<contactref element="R2" pad="1"/>
<contactref element="R6" pad="P$3"/>
</signal>
<signal name="N$2">
<contactref element="R6" pad="P$2"/>
<contactref element="IC1" pad="8"/>
</signal>
</signals>
</board>
</drawing>
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