<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="8.6.1">
<drawing>
<board>
<plain>
<wire x1="50.546" y1="25.4" x2="25.654" y2="25.4" width="0" layer="20"/>
<wire x1="25.654" y1="25.4" x2="25.4" y2="25.654" width="0" layer="20" curve="-90"/>
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<text>MJD122</text>
<text>MIC5205</text>
<text>11V MAX</text>
<text>GND</text>
<text>RX</text>
<text>TX</text>
<text>5V</text>
<text>SCLK</text>
<text>MOSI</text>
<text>MISO</text>
<text>RST</text>
<text>GND</text>
<text>5V</text>
<text>Design: Walker Arce</text>
<text>Return of the Square Inch Project</text>
</plain>
<libraries>
<library name="adafruit">
<packages>
<package name="C0402">
<description>&lt;b&gt;CAPACITOR&lt;/b&gt;&lt;p&gt;
chip</description>
</package>
<package name="C1206">
<description>&lt;b&gt;CAPACITOR&lt;/b&gt;&lt;p&gt;
chip</description>
</package>
<package name="R0402">
<description>&lt;b&gt;RESISTOR&lt;/b&gt;&lt;p&gt;
chip</description>
</package>
</packages>
</library>
<library name="SparkFun-Coils">
<description>&lt;h3&gt;SparkFun Coils&lt;/h3&gt;
In this library you'll find magnetics.

&lt;p&gt;&lt;b&gt;SparkFun Products:&lt;/b&gt;
&lt;ul&gt;&lt;li&gt;Inductors&lt;/li&gt;
&lt;li&gt;Ferrite Beads&lt;/li&gt;
&lt;li&gt;Transformers&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;

&lt;br&gt;
&lt;p&gt;We've spent an enormous amount of time creating and checking these footprints and parts, but it is &lt;b&gt; the end user's responsibility&lt;/b&gt; to ensure correctness and suitablity for a given componet or application. 
&lt;br&gt;
&lt;br&gt;If you enjoy using this library, please buy one of our products at &lt;a href=" www.sparkfun.com"&gt;SparkFun.com&lt;/a&gt;.
&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.&lt;/p&gt;</description>
<packages>
<package name="0603">
<description>&lt;p&gt;&lt;b&gt;Generic 1608 (0603) package&lt;/b&gt;&lt;/p&gt;
&lt;p&gt;0.2mm courtyard excess rounded to nearest 0.05mm.&lt;/p&gt;</description>
</package>
</packages>
</library>
<library name="SparkFun-Connectors">
<description>&lt;h3&gt;SparkFun Connectors&lt;/h3&gt;
This library contains electrically-functional connectors. 
&lt;br&gt;
&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is &lt;b&gt; the end user's responsibility&lt;/b&gt; to ensure correctness and suitablity for a given componet or application. 
&lt;br&gt;
&lt;br&gt;If you enjoy using this library, please buy one of our products at &lt;a href=" www.sparkfun.com"&gt;SparkFun.com&lt;/a&gt;.
&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="POWER_JACK_SMD">
<description>&lt;h3&gt;DC Barrel Power Jack/Connector -SMD&lt;/h3&gt;
5.5mm jack, 2.1mm center pole diameter. 
&lt;p&gt;Specifications:
&lt;ul&gt;&lt;li&gt;Pin count:4&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href=”http://cdn.sparkfun.com/datasheets/Prototyping/ADC-H-028-1.pdf”&gt;Datasheet referenced for footprint&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Example device(s):
&lt;ul&gt;&lt;li&gt;POWER_JACK&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;</description>
</package>
<package name="PAD.03X.05">
<description>&lt;h3&gt;Electrically Conductive Pad 0.05" Circle&lt;/h3&gt;
Used as a test point connection for pogo pins or other debugging tools. 
&lt;p&gt;Specifications:
&lt;li&gt;Area: 0.05" x 0.05"&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;
&lt;p&gt;Example device(s):
&lt;ul&gt;&lt;li&gt;TEST_POINT&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;</description>
</package>
<package name="1X04_1MM_RA">
<description>&lt;h3&gt;SMD- 4 Pin Right Angle &lt;/h3&gt;
&lt;p&gt;Specifications:
&lt;ul&gt;&lt;li&gt;Pin count:4&lt;/li&gt;
&lt;li&gt;Pin pitch:0.1"&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;
&lt;p&gt;Example device(s):
&lt;ul&gt;&lt;li&gt;CONN_04&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;</description>
</package>
<package name="BM08B-SRSS-TB">
<description>&lt;h3&gt;JST Vertical Crimp Connect&lt;/h3&gt;
&lt;p&gt;Specifications:
&lt;ul&gt;&lt;li&gt;Pin count: 8&lt;/li&gt;
&lt;li&gt;Pin pitch:1mm&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href=”http://www.jst-mfg.com/product/pdf/eng/eSR.pdf”&gt;Datasheet referenced for footprint&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Example device(s):
&lt;ul&gt;&lt;li&gt;CONN_08&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;</description>
</package>
<package name="1X06-1MM">
<description>&lt;h3&gt;JST SH Vertical  6-Pin Connector -SMD&lt;/h3&gt;
&lt;p&gt;Specifications:
&lt;ul&gt;&lt;li&gt;Pin count:6&lt;/li&gt;
&lt;li&gt;Pin pitch:1mm&lt;/li&gt;
&lt;p&gt;&lt;b&gt;&lt;a href="https://www.sparkfun.com/datasheets/GPS/EM406-SMDConnector-eSH.pdf"&gt;Datasheet referenced for footprint&lt;/a&gt;&lt;/b&gt;&lt;/p&gt;
&lt;/ul&gt;&lt;/p&gt;
&lt;p&gt;Example device(s):
&lt;ul&gt;&lt;li&gt;CONN_06&lt;/li&gt;
&lt;li&gt;EM-406&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;</description>
</package>
</packages>
</library>
<library name="SparkFun-Switches">
<description>&lt;h3&gt;SparkFun Switches, Buttons, Encoders&lt;/h3&gt;
In this library you'll find switches, buttons, joysticks, and anything that moves to create or disrupt an electrical connection.
&lt;br&gt;
&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is &lt;b&gt; the end user's responsibility&lt;/b&gt; to ensure correctness and suitablity for a given componet or application. 
&lt;br&gt;
&lt;br&gt;If you enjoy using this library, please buy one of our products at &lt;a href=" www.sparkfun.com"&gt;SparkFun.com&lt;/a&gt;.
&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="TACTILE_SWITCH_SMD_4.6X2.8MM">
<description>&lt;h3&gt;Momentary Switch (Pushbutton) - SPST - SMD, 4.6 x 2.8mm&lt;/h3&gt;
&lt;p&gt;Normally-open (NO) SPST momentary switches (buttons, pushbuttons).&lt;/p&gt;
&lt;p&gt;&lt;a href="http://www.ck-components.com/media/1479/kmr2.pdf"&gt;Datasheet&lt;/a&gt;&lt;/p&gt;</description>
</package>
</packages>
</library>
<library name="QFN50P300X300X100-17N">
<packages>
<package name="QFN50P300X300X100-17N">
</package>
</packages>
</library>
<library name="SparkFun-IC-Microcontroller">
<description>&lt;h3&gt;SparkFun Microcontrollers&lt;/h3&gt;
This library contains microcontrollers.
&lt;br&gt;
&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is &lt;b&gt; the end user's responsibility&lt;/b&gt; to ensure correctness and suitablity for a given componet or application. 
&lt;br&gt;
&lt;br&gt;If you enjoy using this library, please buy one of our products at &lt;a href=" www.sparkfun.com"&gt;SparkFun.com&lt;/a&gt;.
&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="VQFN-28">
</package>
</packages>
</library>
<library name="SparkFun-IC-Power">
<description>&lt;h3&gt;SparkFun Power Driver and Management ICs&lt;/h3&gt;
In this library you'll find anything that has to do with power delivery, or making power supplies.
&lt;p&gt;Contents:
&lt;ul&gt;&lt;li&gt;LDOs&lt;/li&gt;
&lt;li&gt;Boost/Buck controllers&lt;/li&gt;
&lt;li&gt;Charge pump controllers&lt;/li&gt;
&lt;li&gt;Power sequencers&lt;/li&gt;
&lt;li&gt;Power switches&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;
&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is &lt;b&gt; the end user's responsibility&lt;/b&gt; to ensure correctness and suitablity for a given componet or application. 
&lt;br&gt;
&lt;br&gt;If you enjoy using this library, please buy one of our products at &lt;a href=" www.sparkfun.com"&gt;SparkFun.com&lt;/a&gt;.
&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="SOT23-5">
<description>&lt;b&gt;Small Outline Transistor&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="Susumu KRL2012E-M-R330-F-T5">
<packages>
<package name="RES_2012-L">
</package>
</packages>
</library>
<library name="SparkFun-Resistors">
<description>&lt;h3&gt;SparkFun Resistors&lt;/h3&gt;
This library contains resistors. Reference designator:R. 
&lt;br&gt;
&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is &lt;b&gt; the end user's responsibility&lt;/b&gt; to ensure correctness and suitablity for a given componet or application. 
&lt;br&gt;
&lt;br&gt;If you enjoy using this library, please buy one of our products at &lt;a href=" www.sparkfun.com"&gt;SparkFun.com&lt;/a&gt;.
&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="TRIMPOT-SMD-TC33X">
<description>&lt;h3&gt;Bourns TC33X Trimpot - SMD, 3mm Square, Open-Frame&lt;/h3&gt;
&lt;p&gt;Used on e.g. &lt;a href="https://www.sparkfun.com/products/13899"&gt;Shapeoko&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;a href="http://www.bourns.com/docs/Product-Datasheets/TC33.pdf"&gt;Datasheet&lt;/a&gt; (TS53YL502MR10)&lt;/p&gt;</description>
</package>
</packages>
</library>
<library name="MJD122">
<packages>
<package name="DPAK">
</package>
</packages>
</library>
<library name="SparkFun-Clocks">
<description>&lt;h3&gt;SparkFun Clocks, Oscillators and Resonators&lt;/h3&gt;
This library contains the real-time clocks, oscillators, resonators, and crystals we use. 
&lt;br&gt;
&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is &lt;b&gt; the end user's responsibility&lt;/b&gt; to ensure correctness and suitablity for a given componet or application. 
&lt;br&gt;
&lt;br&gt;If you enjoy using this library, please buy one of our products at &lt;a href=" www.sparkfun.com"&gt;SparkFun.com&lt;/a&gt;.
&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="RESONATOR-SMD-3.2X1.3">
<description>&lt;h3&gt;3.2x1.3mm 3-Pin SMD Resonator&lt;/h3&gt;
&lt;p&gt;&lt;a href="http://www.murata.com/~/media/webrenewal/support/library/catalog/products/timingdevice/ceralock/p16e.ashx"&gt;Example datasheet&lt;/a&gt; (CSTCE_VH3L)&lt;/p&gt;</description>
</package>
</packages>
</library>
</libraries>
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<element name="C8" library="adafruit" package="C0402" value="2.2u">
<attribute name="NAME"/>
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<element name="FB1" library="SparkFun-Coils" package="0603" value="30Ω/1.8A">
<attribute name="NAME"/>
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<attribute name="NAME"/>
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<attribute name="SF_ID" value="PRT-12748"/>
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<element name="U$1" library="QFN50P300X300X100-17N" package="QFN50P300X300X100-17N" value="STSPIN220"/>
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<attribute name="VALUE"/>
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<element name="U3" library="SparkFun-IC-Microcontroller" package="VQFN-28" value="ATMEGA328P_VQFNVQFN"/>
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<element name="TP3" library="SparkFun-Connectors" package="PAD.03X.05" value="TEST-POINT3X5"/>
<element name="TP4" library="SparkFun-Connectors" package="PAD.03X.05" value="TEST-POINT3X5"/>
<element name="TP5" library="SparkFun-Connectors" package="PAD.03X.05" value="TEST-POINT3X5"/>
<element name="TP6" library="SparkFun-Connectors" package="PAD.03X.05" value="TEST-POINT3X5"/>
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<attribute name="VENDOR" value="Susumu"/>
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<attribute name="VENDOR" value="Susumu"/>
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<attribute name="VENDOR" value="Susumu"/>
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<attribute name="NAME"/>
<attribute name="VENDOR" value="Susumu"/>
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<element name="U1" library="SparkFun-IC-Power" package="SOT23-5" value="5V">
<attribute name="PROD_ID" value="VREG-00823"/>
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<attribute name="VALUE"/>
</element>
<element name="C9" library="adafruit" package="C0402" value="0.1u">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R16" library="adafruit" package="R0402" value="10k">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R17" library="adafruit" package="R0402" value="10k">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C10" library="adafruit" package="C0402" value="0.1u">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R18" library="adafruit" package="R0402" value="10k">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="VR1" library="SparkFun-Resistors" package="TRIMPOT-SMD-TC33X" value="10k">
<attribute name="PROD_ID" value="RES-12428, RES-08048"/>
<attribute name="VALUE"/>
</element>
<element name="VR2" library="SparkFun-Resistors" package="TRIMPOT-SMD-TC33X" value="10k">
<attribute name="PROD_ID" value="RES-12428, RES-08048"/>
<attribute name="VALUE"/>
</element>
<element name="VR3" library="SparkFun-Resistors" package="TRIMPOT-SMD-TC33X" value="10k">
<attribute name="PROD_ID" value="RES-12428, RES-08048"/>
<attribute name="VALUE"/>
</element>
<element name="VR4" library="SparkFun-Resistors" package="TRIMPOT-SMD-TC33X" value="10k">
<attribute name="PROD_ID" value="RES-12428, RES-08048"/>
<attribute name="VALUE"/>
</element>
<element name="R19" library="adafruit" package="R0402" value="10k">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R20" library="adafruit" package="R0402" value="10k">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R21" library="adafruit" package="R0402" value="10k">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R22" library="adafruit" package="R0402" value="10k">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R23" library="adafruit" package="R0402" value="10k">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="J6" library="SparkFun-Connectors" package="BM08B-SRSS-TB" value="">
<attribute name="NAME"/>
<attribute name="PROD_ID" value="CONN-10556"/>
<attribute name="VALUE"/>
</element>
<element name="U2" library="MJD122" package="DPAK" value="MJD122T4">
<attribute name="MANUFACTURER_PART_NUMBER" value="MJD122T4"/>
<attribute name="VENDOR" value="STMicroelectronics"/>
</element>
<element name="R24" library="adafruit" package="R0402" value="10k">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="J7" library="SparkFun-Connectors" package="1X06-1MM" value="">
<attribute name="NAME"/>
<attribute name="PROD_ID" value="CONN-08249"/>
<attribute name="SF_ID" value="GPS-00579"/>
<attribute name="VALUE"/>
</element>
<element name="Y1" library="SparkFun-Clocks" package="RESONATOR-SMD-3.2X1.3" value="16MHz">
<attribute name="NAME"/>
<attribute name="PROD_ID" value="XTAL-08900"/>
</element>
<element name="TP7" library="SparkFun-Connectors" package="PAD.03X.05" value="TEST-POINT3X5"/>
<element name="TP8" library="SparkFun-Connectors" package="PAD.03X.05" value="TEST-POINT3X5"/>
<element name="TP9" library="SparkFun-Connectors" package="PAD.03X.05" value="TEST-POINT3X5"/>
<element name="TP10" library="SparkFun-Connectors" package="PAD.03X.05" value="TEST-POINT3X5"/>
</elements>
<signals>
<signal name="GND">
<contactref element="C2" pad="2"/>
<contactref element="C1" pad="2"/>
<contactref element="S1" pad="1"/>
<contactref element="S1" pad="2"/>
<contactref element="C8" pad="2"/>
<contactref element="J1" pad="GND"/>
<contactref element="J1" pad="P$4"/>
<contactref element="C4" pad="2"/>
<contactref element="U3" pad="18"/>
<contactref element="U3" pad="4"/>
<contactref element="U3" pad="PAD"/>
<contactref element="TP6" pad="P$1"/>
<contactref element="R10" pad="1"/>
<contactref element="R9" pad="1"/>
<contactref element="R7" pad="1"/>
<contactref element="R8" pad="1"/>
<contactref element="R5" pad="1"/>
<contactref element="R3" pad="1"/>
<contactref element="R4" pad="1"/>
<contactref element="R6" pad="1"/>
<contactref element="U$4" pad="17"/>
<contactref element="U$4" pad="7"/>
<contactref element="U$3" pad="17"/>
<contactref element="U$3" pad="7"/>
<contactref element="U$2" pad="17"/>
<contactref element="U$2" pad="7"/>
<contactref element="U$1" pad="17"/>
<contactref element="U$1" pad="7"/>
<contactref element="U1" pad="2"/>
<contactref element="C5" pad="2"/>
<contactref element="C6" pad="2"/>
<contactref element="R12" pad="1"/>
<contactref element="C7" pad="2"/>
<contactref element="R14" pad="1"/>
<contactref element="C9" pad="2"/>
<contactref element="R16" pad="1"/>
<contactref element="C10" pad="2"/>
<contactref element="R18" pad="1"/>
<contactref element="VR4" pad="1"/>
<contactref element="VR3" pad="1"/>
<contactref element="VR2" pad="1"/>
<contactref element="VR1" pad="1"/>
<contactref element="J6" pad="7"/>
<contactref element="J6" pad="3"/>
<contactref element="J6" pad="1"/>
<contactref element="J6" pad="5"/>
<contactref element="J7" pad="5"/>
<contactref element="J7" pad="3"/>
<contactref element="J7" pad="1"/>
<contactref element="Y1" pad="2"/>
<contactref element="TP7" pad="P$1"/>
<contactref element="U$2" pad="16"/>
<contactref element="U$1" pad="16"/>
<contactref element="U$3" pad="16"/>
<contactref element="U$4" pad="16"/>
</signal>
<signal name="AVCC">
<contactref element="FB1" pad="2"/>
<contactref element="C2" pad="1"/>
<contactref element="U3" pad="17"/>
<contactref element="U3" pad="16"/>
</signal>
<signal name="N$1">
<contactref element="R2" pad="2"/>
<contactref element="S1" pad="3"/>
<contactref element="S1" pad="4"/>
</signal>
<signal name="RST">
<contactref element="R1" pad="1"/>
<contactref element="C1" pad="1"/>
<contactref element="R2" pad="1"/>
<contactref element="U3" pad="25"/>
<contactref element="TP3" pad="P$1"/>
</signal>
<signal name="SCLK">
<contactref element="U3" pad="15"/>
<contactref element="TP2" pad="P$1"/>
</signal>
<signal name="N$2">
<contactref element="U3" pad="5"/>
<contactref element="Y1" pad="1"/>
</signal>
<signal name="N$3">
<contactref element="U3" pad="6"/>
<contactref element="Y1" pad="3"/>
</signal>
<signal name="VCC">
<contactref element="J1" pad="VIN0"/>
<contactref element="C4" pad="1"/>
<contactref element="U$4" pad="6"/>
<contactref element="U$3" pad="6"/>
<contactref element="U$2" pad="6"/>
<contactref element="U$1" pad="6"/>
<contactref element="U2" pad="3"/>
<contactref element="J6" pad="2"/>
<contactref element="J6" pad="6"/>
<contactref element="U1" pad="1"/>
<contactref element="U1" pad="3"/>
</signal>
<signal name="N$4">
<contactref element="U$4" pad="10"/>
<contactref element="J4" pad="4"/>
</signal>
<signal name="N$5">
<contactref element="U$4" pad="8"/>
<contactref element="J4" pad="3"/>
</signal>
<signal name="N$6">
<contactref element="U$4" pad="5"/>
<contactref element="J4" pad="2"/>
</signal>
<signal name="N$7">
<contactref element="U$4" pad="3"/>
<contactref element="J4" pad="1"/>
</signal>
<signal name="N$8">
<contactref element="U$3" pad="5"/>
<contactref element="J5" pad="2"/>
</signal>
<signal name="N$9">
<contactref element="U$3" pad="3"/>
<contactref element="J5" pad="1"/>
</signal>
<signal name="N$10">
<contactref element="U$3" pad="10"/>
<contactref element="J5" pad="4"/>
</signal>
<signal name="N$11">
<contactref element="U$3" pad="8"/>
<contactref element="J5" pad="3"/>
</signal>
<signal name="N$12">
<contactref element="U$2" pad="10"/>
<contactref element="J2" pad="4"/>
</signal>
<signal name="N$13">
<contactref element="U$2" pad="8"/>
<contactref element="J2" pad="3"/>
</signal>
<signal name="N$14">
<contactref element="U$2" pad="5"/>
<contactref element="J2" pad="2"/>
</signal>
<signal name="N$15">
<contactref element="U$2" pad="3"/>
<contactref element="J2" pad="1"/>
</signal>
<signal name="N$16">
<contactref element="U$1" pad="10"/>
<contactref element="J3" pad="4"/>
</signal>
<signal name="N$17">
<contactref element="U$1" pad="8"/>
<contactref element="J3" pad="3"/>
</signal>
<signal name="N$18">
<contactref element="U$1" pad="3"/>
<contactref element="J3" pad="1"/>
</signal>
<signal name="N$19">
<contactref element="U$1" pad="5"/>
<contactref element="J3" pad="2"/>
</signal>
<signal name="N$20">
<contactref element="U$4" pad="4"/>
<contactref element="R9" pad="2"/>
</signal>
<signal name="N$21">
<contactref element="U$4" pad="9"/>
<contactref element="R10" pad="2"/>
</signal>
<signal name="N$22">
<contactref element="U$3" pad="4"/>
<contactref element="R7" pad="2"/>
</signal>
<signal name="N$23">
<contactref element="U$3" pad="9"/>
<contactref element="R8" pad="2"/>
</signal>
<signal name="N$24">
<contactref element="U$2" pad="4"/>
<contactref element="R4" pad="2"/>
</signal>
<signal name="N$25">
<contactref element="U$2" pad="9"/>
<contactref element="R6" pad="2"/>
</signal>
<signal name="N$26">
<contactref element="U$1" pad="4"/>
<contactref element="R5" pad="2"/>
</signal>
<signal name="N$27">
<contactref element="U$1" pad="9"/>
<contactref element="R3" pad="2"/>
</signal>
<signal name="N$28">
<contactref element="U1" pad="4"/>
<contactref element="C5" pad="1"/>
</signal>
<signal name="XDIR">
<contactref element="U$1" pad="1"/>
<contactref element="U3" pad="22"/>
</signal>
<signal name="XSTEP">
<contactref element="U$1" pad="2"/>
<contactref element="U3" pad="23"/>
</signal>
<signal name="YDIR">
<contactref element="U$2" pad="1"/>
<contactref element="U3" pad="28"/>
</signal>
<signal name="YSTEP">
<contactref element="U$2" pad="2"/>
<contactref element="U3" pad="1"/>
</signal>
<signal name="ZDIR">
<contactref element="U$3" pad="1"/>
<contactref element="U3" pad="11"/>
</signal>
<signal name="ZSTEP">
<contactref element="U$3" pad="2"/>
<contactref element="U3" pad="12"/>
</signal>
<signal name="EDIR">
<contactref element="U$4" pad="1"/>
<contactref element="U3" pad="7"/>
</signal>
<signal name="ESTEP">
<contactref element="U$4" pad="2"/>
<contactref element="U3" pad="8"/>
</signal>
<signal name="N$46">
<contactref element="U$1" pad="12"/>
<contactref element="R12" pad="2"/>
<contactref element="R11" pad="2"/>
</signal>
<signal name="N$47">
<contactref element="R11" pad="1"/>
<contactref element="C6" pad="1"/>
</signal>
<signal name="N$49">
<contactref element="U$2" pad="12"/>
<contactref element="R14" pad="2"/>
<contactref element="R13" pad="2"/>
</signal>
<signal name="N$50">
<contactref element="R13" pad="1"/>
<contactref element="C7" pad="1"/>
</signal>
<signal name="N$52">
<contactref element="U$3" pad="12"/>
<contactref element="R16" pad="2"/>
<contactref element="R15" pad="2"/>
</signal>
<signal name="N$53">
<contactref element="R15" pad="1"/>
<contactref element="C9" pad="1"/>
</signal>
<signal name="N$55">
<contactref element="U$4" pad="12"/>
<contactref element="R18" pad="2"/>
<contactref element="R17" pad="2"/>
</signal>
<signal name="N$56">
<contactref element="C10" pad="1"/>
<contactref element="R17" pad="1"/>
</signal>
<signal name="N$59">
<contactref element="R20" pad="1"/>
<contactref element="VR2" pad="3"/>
</signal>
<signal name="N$60">
<contactref element="U$4" pad="11"/>
<contactref element="VR4" pad="2"/>
</signal>
<signal name="N$61">
<contactref element="U$3" pad="11"/>
<contactref element="VR3" pad="2"/>
</signal>
<signal name="N$62">
<contactref element="U$2" pad="11"/>
<contactref element="VR2" pad="2"/>
</signal>
<signal name="N$63">
<contactref element="U$1" pad="11"/>
<contactref element="VR1" pad="2"/>
</signal>
<signal name="N$64">
<contactref element="R19" pad="1"/>
<contactref element="VR1" pad="3"/>
</signal>
<signal name="N$65">
<contactref element="R21" pad="1"/>
<contactref element="VR3" pad="3"/>
</signal>
<signal name="N$66">
<contactref element="R22" pad="1"/>
<contactref element="VR4" pad="3"/>
</signal>
<signal name="THERMIN">
<contactref element="R23" pad="1"/>
<contactref element="J6" pad="8"/>
<contactref element="U3" pad="19"/>
</signal>
<signal name="5V">
<contactref element="R23" pad="2"/>
<contactref element="C8" pad="1"/>
<contactref element="U1" pad="5"/>
<contactref element="FB1" pad="1"/>
<contactref element="U3" pad="3"/>
<contactref element="R1" pad="2"/>
<contactref element="R22" pad="2"/>
<contactref element="R21" pad="2"/>
<contactref element="R20" pad="2"/>
<contactref element="R19" pad="2"/>
<contactref element="TP4" pad="P$1"/>
<contactref element="TP10" pad="P$1"/>
<contactref element="U$2" pad="15"/>
<contactref element="U$1" pad="15"/>
<contactref element="U$3" pad="15"/>
<contactref element="U$4" pad="15"/>
</signal>
<signal name="N$51">
<contactref element="U2" pad="1"/>
<contactref element="R24" pad="2"/>
</signal>
<signal name="EXON">
<contactref element="R24" pad="1"/>
<contactref element="U3" pad="9"/>
</signal>
<signal name="N$54">
<contactref element="U2" pad="2"/>
<contactref element="J6" pad="4"/>
</signal>
<signal name="EENABLE">
<contactref element="U$4" pad="13"/>
<contactref element="U3" pad="2"/>
</signal>
<signal name="DSTBY">
<contactref element="U$4" pad="14"/>
</signal>
<signal name="ZENABLE">
<contactref element="U$3" pad="13"/>
<contactref element="U3" pad="10"/>
</signal>
<signal name="CSTBY">
<contactref element="U$3" pad="14"/>
</signal>
<signal name="YENABLE">
<contactref element="U$2" pad="13"/>
<contactref element="U3" pad="24"/>
</signal>
<signal name="BSTBY">
<contactref element="U$2" pad="14"/>
</signal>
<signal name="XENABLE">
<contactref element="U$1" pad="13"/>
<contactref element="U3" pad="21"/>
</signal>
<signal name="ASTBY">
<contactref element="U$1" pad="14"/>
</signal>
<signal name="XEND">
<contactref element="U3" pad="20"/>
<contactref element="J7" pad="6"/>
</signal>
<signal name="YEND">
<contactref element="U3" pad="13"/>
<contactref element="TP5" pad="P$1"/>
<contactref element="J7" pad="4"/>
</signal>
<signal name="ZEND">
<contactref element="U3" pad="14"/>
<contactref element="TP1" pad="P$1"/>
<contactref element="J7" pad="2"/>
</signal>
<signal name="RXD">
<contactref element="U3" pad="26"/>
<contactref element="TP8" pad="P$1"/>
</signal>
<signal name="TXD">
<contactref element="U3" pad="27"/>
<contactref element="TP9" pad="P$1"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
