<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="7.0.0">
<drawing>
<board>
<plain>
<wire x1="4.445" y1="0" x2="36.195" y2="0" width="0" layer="20"/>
<wire x1="40.64" y1="4.445" x2="40.64" y2="36.195" width="0" layer="20"/>
<wire x1="36.195" y1="40.64" x2="4.445" y2="40.64" width="0" layer="20"/>
<wire x1="0" y1="36.195" x2="0" y2="4.445" width="0" layer="20"/>
<wire x1="4.445" y1="0" x2="0" y2="4.445" width="0" layer="20" curve="-90"/>
<wire x1="40.64" y1="4.445" x2="36.195" y2="0" width="0" layer="20" curve="-90"/>
<wire x1="36.195" y1="40.64" x2="40.64" y2="36.195" width="0" layer="20" curve="-90"/>
<wire x1="0" y1="36.195" x2="4.445" y2="40.64" width="0" layer="20" curve="-90"/>
</plain>
<libraries>
<library name="dp_devices">
<description>Dangerous Prototypes Standard PCB sizes
http://dangerousprototypes.com</description>
<packages>
<package name="BATT2032">
</package>
<package name="C603">
</package>
<package name="SOT-23-5">
</package>
<package name="LED-603">
</package>
<package name="R603">
</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="SOT23">
<description>&lt;b&gt;SMALL OUTLINE TRANSISTOR&lt;/b&gt;&lt;p&gt;
reflow soldering</description>
</package>
</packages>
</library>
<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="SMA-EDGE">
<description>&lt;b&gt;SMA Antenna Connector&lt;/b&gt;&lt;p&gt;
This is a footprint for an edge mount RF antenna. Works pretty well with SMA type connectors but may also work with other edge mount RF connectors. Keep in mind, these edge mount connectors assume you are using a 0.062" PCB thickness.</description>
</package>
</packages>
</library>
<library name="MEMS_Lib">
<packages>
<package name="SOIC-8">
</package>
</packages>
</library>
<library name="holes">
<description>&lt;b&gt;Mounting Holes and Pads&lt;/b&gt;&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="3,3">
<description>&lt;b&gt;MOUNTING HOLE&lt;/b&gt; 3.3 mm with drill center</description>
</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>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="BATT1" library="dp_devices" package="BATT2032" value="BATTERY_2032"/>
<element name="C1" library="dp_devices" package="C603" value="100n"/>
<element name="C2" library="dp_devices" package="C603" value="100n"/>
<element name="C3" library="dp_devices" package="C603" value="100n"/>
<element name="C4" library="dp_devices" package="C603" value="10p"/>
<element name="C5" library="dp_devices" package="C603" value="10p"/>
<element name="IC1" library="linear" package="SOT23" value="LM50"/>
<element name="IC2" library="dp_devices" package="SOT-23-5" value="IC_OP-AMP_LMV321-SOT-23-5"/>
<element name="J$1" library="SparkFun-Connectors" package="SMA-EDGE" value="SMA_EDGE"/>
<element name="J$2" library="SparkFun-Connectors" package="SMA-EDGE" value="SMA_EDGE"/>
<element name="LED1" library="dp_devices" package="LED-603" value="">
<attribute name="VALUE"/>
</element>
<element name="R1" library="dp_devices" package="R603" value="10k"/>
<element name="R10" library="dp_devices" package="R603" value="6.8k"/>
<element name="R11" library="dp_devices" package="R603" value="2.2k"/>
<element name="R12" library="dp_devices" package="R603" value="1k"/>
<element name="R13" library="dp_devices" package="R603" value="270"/>
<element name="R2" library="dp_devices" package="R603" value="270"/>
<element name="R3" library="dp_devices" package="R603" value="270"/>
<element name="R4" library="dp_devices" package="R603" value="270"/>
<element name="R5" library="dp_devices" package="R603" value="100k"/>
<element name="R6" library="dp_devices" package="R603" value="100k"/>
<element name="R7" library="dp_devices" package="R603" value="6.8k"/>
<element name="R8" library="dp_devices" package="R603" value="2.2k"/>
<element name="R9" library="dp_devices" package="R603" value="1k"/>
<element name="U$1" library="MEMS_Lib" package="SOIC-8" value="MAX42239ASA+"/>
<element name="U$2" library="MEMS_Lib" package="SOIC-8" value="MAX42239ASA+"/>
<element name="U$3" library="holes" package="3,3" value=""/>
<element name="U$4" library="holes" package="3,3" value=""/>
<element name="S1" library="SparkFun-Electromechanical" package="SWITCH-SPDT" value="">
<attribute name="VALUE"/>
</element>
<element name="U$5" library="holes" package="3,3" value=""/>
<element name="U$6" library="holes" package="3,3" value=""/>
</elements>
<signals>
<signal name="VSS">
<contactref element="IC1" pad="1"/>
<contactref element="BATT1" pad="V-"/>
<contactref element="R3" pad="1"/>
<contactref element="IC2" pad="2"/>
<contactref element="R6" pad="1"/>
<contactref element="C1" pad="2"/>
<contactref element="C2" pad="2"/>
<contactref element="U$1" pad="P$4"/>
<contactref element="C3" pad="2"/>
<contactref element="U$2" pad="P$4"/>
</signal>
<signal name="VDD">
<contactref element="IC1" pad="3"/>
<contactref element="IC2" pad="5"/>
<contactref element="R5" pad="2"/>
<contactref element="C1" pad="1"/>
<contactref element="C2" pad="1"/>
<contactref element="U$1" pad="P$7"/>
<contactref element="U$1" pad="P$1"/>
<contactref element="C3" pad="1"/>
<contactref element="U$2" pad="P$7"/>
<contactref element="U$2" pad="P$1"/>
<contactref element="S1" pad="3"/>
</signal>
<signal name="N$1">
<contactref element="IC1" pad="2"/>
<contactref element="LED1" pad="A"/>
</signal>
<signal name="GND">
<contactref element="J$1" pad="GND@3"/>
<contactref element="J$1" pad="GND@2"/>
<contactref element="J$1" pad="GND@1"/>
<contactref element="J$1" pad="GND@0"/>
<contactref element="R1" pad="1"/>
<contactref element="R4" pad="2"/>
<contactref element="R9" pad="1"/>
<contactref element="R12" pad="1"/>
<contactref element="J$2" pad="GND@0"/>
<contactref element="J$2" pad="GND@3"/>
<contactref element="J$2" pad="GND@2"/>
<contactref element="J$2" pad="GND@1"/>
</signal>
<signal name="N$2">
<contactref element="J$1" pad="SIG"/>
<contactref element="R1" pad="2"/>
<contactref element="R2" pad="1"/>
</signal>
<signal name="N$3">
<contactref element="LED1" pad="C"/>
<contactref element="R3" pad="2"/>
</signal>
<signal name="N$4">
<contactref element="IC2" pad="3"/>
<contactref element="IC2" pad="4"/>
<contactref element="R4" pad="1"/>
</signal>
<signal name="N$5">
<contactref element="R5" pad="1"/>
<contactref element="R6" pad="2"/>
<contactref element="IC2" pad="1"/>
</signal>
<signal name="N$7">
<contactref element="R2" pad="2"/>
<contactref element="U$1" pad="P$3"/>
</signal>
<signal name="N$8">
<contactref element="U$1" pad="P$2"/>
<contactref element="C4" pad="1"/>
<contactref element="R9" pad="2"/>
<contactref element="R7" pad="1"/>
</signal>
<signal name="N$6">
<contactref element="C4" pad="2"/>
<contactref element="U$1" pad="P$6"/>
<contactref element="R8" pad="2"/>
<contactref element="U$2" pad="P$3"/>
</signal>
<signal name="N$9">
<contactref element="R7" pad="2"/>
<contactref element="R8" pad="1"/>
</signal>
<signal name="N$11">
<contactref element="U$2" pad="P$6"/>
<contactref element="R13" pad="1"/>
</signal>
<signal name="N$10">
<contactref element="R10" pad="1"/>
<contactref element="R12" pad="2"/>
<contactref element="C5" pad="1"/>
<contactref element="U$2" pad="P$2"/>
</signal>
<signal name="N$12">
<contactref element="R10" pad="2"/>
<contactref element="R11" pad="1"/>
</signal>
<signal name="N$13">
<contactref element="R11" pad="2"/>
<contactref element="R13" pad="2"/>
<contactref element="C5" pad="2"/>
<contactref element="J$2" pad="SIG"/>
</signal>
<signal name="N$14">
<contactref element="BATT1" pad="V1"/>
<contactref element="S1" pad="2"/>
<contactref element="BATT1" pad="V2"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
