<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="6.3">
<drawing>
<board>
<plain>
<wire x1="0" y1="0" x2="160" y2="0" width="0" layer="20"/>
<wire x1="160" y1="0" x2="160" y2="100" width="0" layer="20"/>
<wire x1="160" y1="100" x2="0" y2="100" width="0" layer="20"/>
<wire x1="0" y1="100" x2="0" y2="0" width="0" layer="20"/>
</plain>
<libraries>
<library name="rcl">
<packages>
<package name="C0805K">
<description>&lt;b&gt;Ceramic Chip Capacitor KEMET 0805 reflow solder&lt;/b&gt;&lt;p&gt;
Metric Code Size 2012</description>
</package>
<package name="R0805">
<description>&lt;b&gt;RESISTOR&lt;/b&gt;&lt;p&gt;</description>
</package>
<package name="E5-10,5">
<description>&lt;b&gt;ELECTROLYTIC CAPACITOR&lt;/b&gt;&lt;p&gt;
grid 5.08 mm, diameter 10.5 mm</description>
</package>
<package name="E7,5-18">
<description>&lt;b&gt;ELECTROLYTIC CAPACITOR&lt;/b&gt;&lt;p&gt;
grid 7.62 mm, diameter 18 mm</description>
</package>
<package name="SMC_A">
<description>&lt;b&gt;Chip Capacitor &lt;/b&gt; Polar tantalum capacitors with solid electrolyte&lt;p&gt;
Siemens Matsushita Components B 45 194, B 45 197, B 45 198&lt;br&gt;
Source: www.farnell.com/datasheets/247.pdf</description>
</package>
</packages>
</library>
<library name="SparkFun">
<packages>
<package name="HC49UP">
<description>&lt;b&gt;CRYSTAL&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="con-usb-3_shielded">
<description>&lt;b&gt;USB Connectors&lt;/b&gt;&lt;p&gt;
Based on the datasheets for the following products.&lt;br&gt;
&lt;table&gt;
&lt;tr&gt;&lt;td&gt;Amp&lt;/td&gt;&lt;td&gt;292303-7&lt;/td&gt;&lt;td&gt;Series A Sourface Mounted&lt;/td&gt;
&lt;tr&gt;&lt;td&gt;Amp&lt;/td&gt;&lt;td&gt;1734346-1&lt;/td&gt;&lt;td&gt;Series B Sourface Mounted&lt;/td&gt;&lt;tr&gt;
&lt;/table&gt;</description>
<packages>
<package name="USB-B-SMT">
<description>USB Series B Surface Mounted with shield connection</description>
</package>
</packages>
</library>
<library name="adafruit">
<packages>
<package name="CHIPLED_0805">
<description>&lt;b&gt;CHIPLED&lt;/b&gt;&lt;p&gt;
Source: http://www.osram.convergy.de/ ... LG_R971.pdf</description>
</package>
<package name="EVQ-Q2">
</package>
</packages>
</library>
<library name="tidyeagle">
<description>&lt;h4&gt;A neat and tidy Eagle Library.&lt;/h4&gt;

&lt;p&gt;This is my personal Eagle library where I add parts that I need as and when I need them with the aim of keeping the look and feel consistent across the schematic and the board.&lt;/p&gt;

&lt;p&gt;&lt;a href="https://github.com/adnbr/TidyEagle"&gt;Pick up the latest version at GitHub.&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;This library draws inspiration from the libraries included with Eagle, as well as those from companies such as &lt;a href="http://www.opencircuits.com/SFE_Footprint_Library_Eagle"&gt;SparkFun&lt;/a&gt; and &lt;a href="https://github.com/adafruit/Adafruit-Eagle-Library"&gt;Adafruit&lt;/a&gt;. Check out their libraries, they contain an eclectic mix of, well almost anything you could need.&lt;/p&gt;

&lt;p&gt;Take care to look in the description under the details for each part as to whether the package has been tested. This is very important, as I don't take any responsibility for any errors in production this library causes!&lt;/p&gt;</description>
<packages>
<package name="DIL28-3">
<description>&lt;B&gt;Dual In Line&lt;/B&gt; 0.3 inch</description>
</package>
</packages>
</library>
<library name="ftdichip">
<description>&lt;b&gt;FTDI (TM) CHIP&lt;/b&gt; Future Technology Devices International Ltd.&lt;p&gt;
http://www.ftdichip.com</description>
<packages>
<package name="SSOP28">
<description>&lt;b&gt;Shrink Small Outline Package&lt;/b&gt; SSOP-28&lt;p&gt;
http://www.ftdichip.com/Documents/DataSheets/DS_FT232R_v104.pdf</description>
</package>
</packages>
</library>
<library name="con-harting-ml">
<description>&lt;b&gt;Harting  &amp; 3M Connectors&lt;/b&gt;&lt;p&gt;
Low profile connectors, straight&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="ML6">
<description>&lt;b&gt;HARTING&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="con-wago-500">
<description>&lt;b&gt;Wago Screw Clamps&lt;/b&gt;&lt;p&gt;
Grid 5.00 mm&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="W237-4">
<description>&lt;b&gt;WAGO SCREW CLAMP&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="transistor-npn">
<description>&lt;b&gt;NPN Transistors&lt;/b&gt;&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="SOT23-BEC">
<description>TO-236 ITT Intermetall</description>
</package>
</packages>
</library>
<library name="relay">
<description>&lt;b&gt;Relays&lt;/b&gt;&lt;p&gt;
&lt;ul&gt;
&lt;li&gt;Eichhoff
&lt;li&gt;Finder
&lt;li&gt;Fujitsu
&lt;li&gt;HAMLIN
&lt;li&gt;OMRON
&lt;li&gt;Matsushita
&lt;li&gt;NAiS
&lt;li&gt;Siemens
&lt;li&gt;Schrack
&lt;/ul&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="E3206S">
<description>&lt;b&gt;RELAY&lt;/b&gt;&lt;p&gt;
1 x switch, Eichhoff/distributor Schukat</description>
</package>
</packages>
</library>
<library name="diode">
<description>&lt;b&gt;Diodes&lt;/b&gt;&lt;p&gt;
Based on the following sources:
&lt;ul&gt;
&lt;li&gt;Motorola : www.onsemi.com
&lt;li&gt;Fairchild : www.fairchildsemi.com
&lt;li&gt;Philips : www.semiconductors.com
&lt;li&gt;Vishay : www.vishay.de
&lt;/ul&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="DO35-10">
<description>&lt;B&gt;DIODE&lt;/B&gt;&lt;p&gt;
diameter 2 mm, horizontal, grid 10.16 mm</description>
</package>
<package name="MINIMELF">
<description>&lt;b&gt;Mini Melf Diode&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="con-wago-508">
<description>&lt;b&gt;Wago Screw Clamps&lt;/b&gt;&lt;p&gt;
Grid 5.08 mm&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="W237-132">
<description>&lt;b&gt;WAGO SREW CLAMP&lt;/b&gt;</description>
</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="3,2">
<description>&lt;b&gt;MOUNTING HOLE&lt;/b&gt; 3.2 mm with drill center</description>
</package>
</packages>
</library>
<library name="special">
<description>&lt;b&gt;Special Devices&lt;/b&gt;&lt;p&gt;
7-segment displays, switches, heatsinks, crystals, transformers, etc.&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="EDG-03">
<description>&lt;b&gt;DIP SWITCH&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="reprap_amk">
<description>RepRap electronics library.  This library contains miscellaneous components required by the RepRap project.

see:  http://www.reprap.org</description>
<packages>
<package name="DIL16">
</package>
</packages>
</library>
<library name="74ttl-din">
<description>&lt;b&gt;TTL Devices with DIN Symbols&lt;/b&gt;&lt;p&gt;
CadSoft and the author do not warrant that this library is free from error
or will meet your specific requirements.&lt;p&gt;
&lt;author&gt;Created by Holger Bettenbühl, hol.bet.@rhein-main.net&lt;/author&gt;</description>
<packages>
<package name="DIL14">
<description>&lt;b&gt;Dual In Line Package&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="wirepad">
<description>&lt;b&gt;Single Pads&lt;/b&gt;&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="SMD1,27-2,54">
<description>&lt;b&gt;SMD PAD&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="7805">
<packages>
<package name="TO254P1524X460-3N">
</package>
</packages>
</library>
<library name="con-jack">
<description>&lt;b&gt;Jacks&lt;/b&gt;&lt;p&gt;
Power Connectors&lt;br&gt;
Phone Connectors&lt;br&gt;
Cinch Connectors&lt;br&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="DCJ0303">
<description>&lt;b&gt;DC POWER JACK&lt;/b&gt; Pad shape changed to LONG 2007.07.26&lt;p&gt;
Source: DCJ0303.pdf</description>
</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="1X02">
<description>&lt;b&gt;PIN HEADER&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="marks">
<description>&lt;b&gt;Markers for Layout Outline Definition&lt;/b&gt;&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="PASS-ROUND">
<description>&lt;b&gt;MARKER&lt;/b&gt;&lt;p&gt;
round, layers 1 + 16 + 21 + 39 + 49</description>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="X2" library="con-usb-3_shielded" package="USB-B-SMT" value=""/>
<element name="IC1" library="tidyeagle" package="DIL28-3" value="ATMEGA328P-DIP28"/>
<element name="Q2" library="SparkFun" package="HC49UP" value="16MHz"/>
<element name="C7" library="rcl" package="C0805K" value="22pF"/>
<element name="C8" library="rcl" package="C0805K" value="22PF"/>
<element name="IC2" library="ftdichip" package="SSOP28" value="FT232RL">
<attribute name="OC_NEWARK" value="91K9918"/>
<attribute name="MPN" value="FT232RL"/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="1146032"/>
</element>
<element name="C2" library="rcl" package="C0805K" value="100nF"/>
<element name="C3" library="rcl" package="C0805K" value="2.2uF"/>
<element name="LED3" library="adafruit" package="CHIPLED_0805" value=""/>
<element name="LED4" library="adafruit" package="CHIPLED_0805" value=""/>
<element name="R1" library="rcl" package="R0805" value="470"/>
<element name="R2" library="rcl" package="R0805" value="470"/>
<element name="R3" library="rcl" package="R0805" value="4k7"/>
<element name="C4" library="rcl" package="C0805K" value="100nF"/>
<element name="C1" library="rcl" package="C0805K" value="100nF"/>
<element name="C5" library="rcl" package="C0805K" value="2.2uF"/>
<element name="C6" library="rcl" package="C0805K" value="100nF"/>
<element name="R4" library="rcl" package="R0805" value="10k"/>
<element name="C9" library="rcl" package="C0805K" value="100nF"/>
<element name="U$1" library="adafruit" package="EVQ-Q2" value="EVQQ2"/>
<element name="SV1" library="con-harting-ml" package="ML6" value="">
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="MPN" value=""/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
</element>
<element name="X1" library="con-wago-500" package="W237-4" value="">
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="MPN" value=""/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
</element>
<element name="R5" library="rcl" package="R0805" value="470"/>
<element name="R6" library="rcl" package="R0805" value="470"/>
<element name="R7" library="rcl" package="R0805" value="470"/>
<element name="LED1" library="adafruit" package="CHIPLED_0805" value=""/>
<element name="LED2" library="adafruit" package="CHIPLED_0805" value=""/>
<element name="LED5" library="adafruit" package="CHIPLED_0805" value=""/>
<element name="C10" library="rcl" package="C0805K" value="100nF"/>
<element name="C11" library="rcl" package="C0805K" value="100nF"/>
<element name="C12" library="rcl" package="C0805K" value="100nF"/>
<element name="R8" library="rcl" package="R0805" value="1k"/>
<element name="Q1" library="transistor-npn" package="SOT23-BEC" value="BC817"/>
<element name="R9" library="rcl" package="R0805" value="470"/>
<element name="LED6" library="adafruit" package="CHIPLED_0805" value=""/>
<element name="K1" library="relay" package="E3206S" value="E3206S">
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="MPN" value=""/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
</element>
<element name="D1" library="diode" package="DO35-10" value="1N4148DO35-10"/>
<element name="X3" library="con-wago-508" package="W237-132" value="">
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="MPN" value=""/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
</element>
<element name="H1" library="holes" package="3,2" value="MOUNT-HOLE3.2"/>
<element name="H2" library="holes" package="3,2" value="MOUNT-HOLE3.2"/>
<element name="H3" library="holes" package="3,2" value="MOUNT-HOLE3.2"/>
<element name="H4" library="holes" package="3,2" value="MOUNT-HOLE3.2"/>
<element name="DRV8825" library="reprap_amk" package="DIL16" value="POLOLUESTEPPERDRIVER"/>
<element name="X4" library="con-wago-500" package="W237-4" value="">
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="MPN" value=""/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
</element>
<element name="R11" library="rcl" package="R0805" value="10k"/>
<element name="C13" library="rcl" package="E5-10,5" value="100uF/35V"/>
<element name="X5" library="con-wago-508" package="W237-132" value="">
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="MPN" value=""/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
</element>
<element name="C14" library="rcl" package="E7,5-18" value="1000uF"/>
<element name="SW1" library="special" package="EDG-03" value=""/>
<element name="R15" library="rcl" package="R0805" value="10k"/>
<element name="R14" library="rcl" package="R0805" value="10k"/>
<element name="V1" library="74ttl-din" package="DIL14" value="74HC00N"/>
<element name="C15" library="rcl" package="C0805K" value="100nF"/>
<element name="C16" library="rcl" package="C0805K" value="100nF"/>
<element name="R16" library="rcl" package="R0805" value="10k"/>
<element name="PAD1" library="wirepad" package="SMD1,27-2,54" value=""/>
<element name="PAD2" library="wirepad" package="SMD1,27-2,54" value=""/>
<element name="IC3" library="7805" package="TO254P1524X460-3N" value="L7805ABD2T-TR">
<attribute name="PACKAGE" value="D2PAK"/>
<attribute name="OC_NEWARK" value="89K0779"/>
<attribute name="MPN" value="L7805ABD2T-TR"/>
<attribute name="SUPPLIER" value="STMicroelectronics"/>
<attribute name="OC_FARNELL" value="2253443"/>
</element>
<element name="J1" library="con-jack" package="DCJ0303" value="">
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="MPN" value=""/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
</element>
<element name="C17" library="rcl" package="C0805K" value="100nF"/>
<element name="C18" library="rcl" package="C0805K" value="100nF"/>
<element name="C20" library="rcl" package="SMC_A" value="22uF"/>
<element name="C19" library="rcl" package="C0805K" value="100nF"/>
<element name="U$3" library="reprap_amk" package="DIL16" value="DRV8825 Polulu"/>
<element name="X6" library="con-wago-500" package="W237-4" value="">
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="MPN" value=""/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
</element>
<element name="R17" library="rcl" package="R0805" value="10k"/>
<element name="C21" library="rcl" package="E5-10,5" value="100uF/35V"/>
<element name="SW2" library="special" package="EDG-03" value=""/>
<element name="R18" library="rcl" package="R0805" value="10k"/>
<element name="R19" library="rcl" package="R0805" value="10k"/>
<element name="R22" library="rcl" package="R0805" value="10k"/>
<element name="U$4" library="reprap_amk" package="DIL16" value="DRV8825 Polulu"/>
<element name="X7" library="con-wago-500" package="W237-4" value="">
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="MPN" value=""/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
</element>
<element name="R23" library="rcl" package="R0805" value="10k"/>
<element name="C22" library="rcl" package="E5-10,5" value="100uF/35V"/>
<element name="SW3" library="special" package="EDG-03" value=""/>
<element name="R24" library="rcl" package="R0805" value="10k"/>
<element name="R25" library="rcl" package="R0805" value="10k"/>
<element name="R28" library="rcl" package="R0805" value="10k"/>
<element name="R10" library="rcl" package="R0805" value="10k"/>
<element name="C23" library="rcl" package="C0805K" value="100nF"/>
<element name="X8" library="con-wago-508" package="W237-132" value="">
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="MPN" value=""/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
</element>
<element name="X9" library="con-wago-500" package="W237-4" value="">
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="MPN" value=""/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
</element>
<element name="R13" library="rcl" package="R0805" value="470"/>
<element name="R20" library="rcl" package="R0805" value="470"/>
<element name="R21" library="rcl" package="R0805" value="470"/>
<element name="C24" library="rcl" package="C0805K" value="100nF"/>
<element name="C25" library="rcl" package="C0805K" value="100nF"/>
<element name="C26" library="rcl" package="C0805K" value="100nF"/>
<element name="JP1" library="pinhead" package="1X02" value=""/>
<element name="LED7" library="adafruit" package="CHIPLED_0805" value=""/>
<element name="R26" library="rcl" package="R0805" value="470"/>
<element name="LED8" library="adafruit" package="CHIPLED_0805" value=""/>
<element name="LED9" library="adafruit" package="CHIPLED_0805" value=""/>
<element name="LED10" library="adafruit" package="CHIPLED_0805" value=""/>
<element name="PROBE" library="con-wago-508" package="W237-132" value="">
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="MPN" value=""/>
<attribute name="MF" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
</element>
<element name="R12" library="rcl" package="R0805" value="470"/>
<element name="LED11" library="adafruit" package="CHIPLED_0805" value=""/>
<element name="C27" library="rcl" package="C0805K" value="100nF"/>
<element name="R27" library="rcl" package="R0805" value="18k"/>
<element name="R29" library="rcl" package="R0805" value="2k"/>
<element name="C28" library="rcl" package="C0805K" value="100nF"/>
<element name="U$5" library="marks" package="PASS-ROUND" value=""/>
<element name="U$6" library="marks" package="PASS-ROUND" value=""/>
<element name="U$7" library="marks" package="PASS-ROUND" value=""/>
<element name="U$8" library="marks" package="PASS-ROUND" value=""/>
<element name="U$9" library="marks" package="PASS-ROUND" value=""/>
<element name="U$10" library="marks" package="PASS-ROUND" value=""/>
<element name="D2" library="diode" package="DO35-10" value="1N4148DO35-10"/>
<element name="D3" library="diode" package="MINIMELF" value="1N4148"/>
<element name="FAN" library="pinhead" package="1X02" value=""/>
</elements>
<signals>
<signal name="GND">
<contactref element="IC1" pad="8"/>
<contactref element="C8" pad="1"/>
<contactref element="C7" pad="1"/>
<contactref element="IC2" pad="7"/>
<contactref element="IC2" pad="25"/>
<contactref element="IC2" pad="18"/>
<contactref element="IC2" pad="21"/>
<contactref element="C3" pad="2"/>
<contactref element="C2" pad="2"/>
<contactref element="IC2" pad="21"/>
<contactref element="IC2" pad="18"/>
<contactref element="IC2" pad="7"/>
<contactref element="IC2" pad="26"/>
<contactref element="X2" pad="GND"/>
<contactref element="C4" pad="1"/>
<contactref element="IC2" pad="25"/>
<contactref element="C1" pad="2"/>
<contactref element="C5" pad="2"/>
<contactref element="IC1" pad="8"/>
<contactref element="IC1" pad="22"/>
<contactref element="C6" pad="2"/>
<contactref element="C9" pad="1"/>
<contactref element="U$1" pad="B'"/>
<contactref element="U$1" pad="B"/>
<contactref element="SV1" pad="6"/>
<contactref element="X1" pad="1"/>
<contactref element="C12" pad="1"/>
<contactref element="C11" pad="1"/>
<contactref element="C10" pad="1"/>
<contactref element="Q1" pad="E"/>
<contactref element="LED6" pad="C"/>
<contactref element="DRV8825" pad="8"/>
<contactref element="DRV8825" pad="2"/>
<contactref element="C13" pad="-"/>
<contactref element="C14" pad="-"/>
<contactref element="X5" pad="2"/>
<contactref element="C15" pad="2"/>
<contactref element="V1" pad="7"/>
<contactref element="C16" pad="2"/>
<contactref element="R16" pad="2"/>
<contactref element="J1" pad="3"/>
<contactref element="J1" pad="2"/>
<contactref element="IC3" pad="2"/>
<contactref element="C18" pad="2"/>
<contactref element="C17" pad="2"/>
<contactref element="C20" pad="-"/>
<contactref element="C19" pad="2"/>
<contactref element="U$3" pad="8"/>
<contactref element="U$3" pad="2"/>
<contactref element="C21" pad="-"/>
<contactref element="U$4" pad="8"/>
<contactref element="U$4" pad="2"/>
<contactref element="C22" pad="-"/>
<contactref element="C23" pad="1"/>
<contactref element="X8" pad="2"/>
<contactref element="C26" pad="1"/>
<contactref element="C25" pad="1"/>
<contactref element="C24" pad="1"/>
<contactref element="X9" pad="4"/>
<contactref element="C27" pad="2"/>
<contactref element="PROBE" pad="2"/>
<contactref element="C28" pad="1"/>
<contactref element="R29" pad="1"/>
<contactref element="FAN" pad="1"/>
</signal>
<signal name="VCC">
<contactref element="R1" pad="2"/>
<contactref element="R2" pad="2"/>
<contactref element="IC1" pad="20"/>
<contactref element="C1" pad="1"/>
<contactref element="C5" pad="1"/>
<contactref element="IC1" pad="7"/>
<contactref element="R4" pad="2"/>
<contactref element="SV1" pad="2"/>
<contactref element="LED1" pad="A"/>
<contactref element="LED2" pad="A"/>
<contactref element="LED5" pad="A"/>
<contactref element="R11" pad="2"/>
<contactref element="R15" pad="2"/>
<contactref element="R14" pad="2"/>
<contactref element="C15" pad="1"/>
<contactref element="V1" pad="14"/>
<contactref element="IC2" pad="20"/>
<contactref element="IC2" pad="20"/>
<contactref element="IC2" pad="4"/>
<contactref element="C3" pad="1"/>
<contactref element="C2" pad="1"/>
<contactref element="R3" pad="2"/>
<contactref element="C16" pad="1"/>
<contactref element="PAD1" pad="1"/>
<contactref element="C19" pad="1"/>
<contactref element="R17" pad="2"/>
<contactref element="R18" pad="2"/>
<contactref element="R22" pad="2"/>
<contactref element="R23" pad="2"/>
<contactref element="R24" pad="2"/>
<contactref element="R28" pad="2"/>
<contactref element="R10" pad="2"/>
<contactref element="R19" pad="2"/>
<contactref element="R25" pad="2"/>
<contactref element="LED7" pad="A"/>
<contactref element="LED9" pad="A"/>
<contactref element="LED10" pad="A"/>
<contactref element="LED8" pad="A"/>
<contactref element="LED11" pad="A"/>
<contactref element="IC3" pad="3"/>
<contactref element="C17" pad="1"/>
</signal>
<signal name="RX">
<contactref element="IC2" pad="5"/>
<contactref element="IC1" pad="3"/>
</signal>
<signal name="TX">
<contactref element="IC2" pad="1"/>
<contactref element="IC1" pad="2"/>
</signal>
<signal name="N$4">
<contactref element="IC1" pad="9"/>
<contactref element="Q2" pad="2"/>
<contactref element="C7" pad="2"/>
</signal>
<signal name="N$5">
<contactref element="IC1" pad="10"/>
<contactref element="Q2" pad="1"/>
<contactref element="C8" pad="2"/>
</signal>
<signal name="N$1">
<contactref element="X2" pad="D-"/>
<contactref element="IC2" pad="16"/>
</signal>
<signal name="N$2">
<contactref element="X2" pad="D+"/>
<contactref element="IC2" pad="15"/>
</signal>
<signal name="N$7">
<contactref element="IC2" pad="23"/>
<contactref element="LED3" pad="C"/>
</signal>
<signal name="N$8">
<contactref element="IC2" pad="22"/>
<contactref element="LED4" pad="C"/>
</signal>
<signal name="N$9">
<contactref element="LED3" pad="A"/>
<contactref element="R1" pad="1"/>
</signal>
<signal name="N$10">
<contactref element="R2" pad="1"/>
<contactref element="LED4" pad="A"/>
</signal>
<signal name="N$11">
<contactref element="IC2" pad="19"/>
<contactref element="R3" pad="1"/>
<contactref element="R16" pad="1"/>
</signal>
<signal name="N$14">
<contactref element="IC2" pad="17"/>
<contactref element="C4" pad="2"/>
</signal>
<signal name="N$13">
<contactref element="IC1" pad="21"/>
<contactref element="C6" pad="1"/>
</signal>
<signal name="MOSI">
<contactref element="SV1" pad="4"/>
<contactref element="IC1" pad="17"/>
</signal>
<signal name="RESET">
<contactref element="SV1" pad="5"/>
<contactref element="IC1" pad="1"/>
<contactref element="R4" pad="1"/>
<contactref element="C9" pad="2"/>
<contactref element="U$1" pad="A"/>
<contactref element="U$1" pad="A'"/>
</signal>
<signal name="X-LIMIT">
<contactref element="IC1" pad="15"/>
<contactref element="X1" pad="4"/>
<contactref element="R7" pad="1"/>
<contactref element="C10" pad="2"/>
</signal>
<signal name="Y-LIMIT">
<contactref element="IC1" pad="16"/>
<contactref element="X1" pad="3"/>
<contactref element="R6" pad="1"/>
<contactref element="C11" pad="2"/>
</signal>
<signal name="MISO,Z-LIMIT">
<contactref element="IC1" pad="18"/>
<contactref element="SV1" pad="1"/>
<contactref element="X1" pad="2"/>
<contactref element="R5" pad="1"/>
<contactref element="C12" pad="2"/>
</signal>
<signal name="N$3">
<contactref element="LED1" pad="C"/>
<contactref element="R7" pad="2"/>
</signal>
<signal name="N$6">
<contactref element="LED2" pad="C"/>
<contactref element="R6" pad="2"/>
</signal>
<signal name="N$12">
<contactref element="LED5" pad="C"/>
<contactref element="R5" pad="2"/>
</signal>
<signal name="N$16">
<contactref element="Q1" pad="B"/>
<contactref element="R8" pad="2"/>
</signal>
<signal name="N$17">
<contactref element="R9" pad="1"/>
<contactref element="LED6" pad="A"/>
</signal>
<signal name="N$19">
<contactref element="K1" pad="1"/>
<contactref element="Q1" pad="C"/>
<contactref element="D1" pad="A"/>
</signal>
<signal name="+24V">
<contactref element="K1" pad="2"/>
<contactref element="D1" pad="C"/>
<contactref element="DRV8825" pad="1"/>
<contactref element="C13" pad="+"/>
<contactref element="C14" pad="+"/>
<contactref element="U$3" pad="1"/>
<contactref element="C21" pad="+"/>
<contactref element="U$4" pad="1"/>
<contactref element="C22" pad="+"/>
<contactref element="R27" pad="2"/>
<contactref element="D2" pad="C"/>
</signal>
<signal name="N$20">
<contactref element="K1" pad="P"/>
<contactref element="X3" pad="1"/>
</signal>
<signal name="N$21">
<contactref element="K1" pad="S"/>
<contactref element="X3" pad="2"/>
</signal>
<signal name="N$15">
<contactref element="DRV8825" pad="15"/>
<contactref element="SW1" pad="3"/>
</signal>
<signal name="EN">
<contactref element="DRV8825" pad="16"/>
<contactref element="R11" pad="1"/>
<contactref element="V1" pad="3"/>
<contactref element="U$3" pad="16"/>
<contactref element="R17" pad="1"/>
<contactref element="U$4" pad="16"/>
<contactref element="R23" pad="1"/>
</signal>
<signal name="N$23">
<contactref element="DRV8825" pad="12"/>
<contactref element="DRV8825" pad="11"/>
<contactref element="R15" pad="1"/>
</signal>
<signal name="XSTEP">
<contactref element="DRV8825" pad="10"/>
<contactref element="IC1" pad="4"/>
</signal>
<signal name="XDIR">
<contactref element="DRV8825" pad="9"/>
<contactref element="IC1" pad="11"/>
</signal>
<signal name="N$24">
<contactref element="DRV8825" pad="3"/>
<contactref element="X4" pad="4"/>
</signal>
<signal name="N$25">
<contactref element="DRV8825" pad="4"/>
<contactref element="X4" pad="3"/>
</signal>
<signal name="N$26">
<contactref element="DRV8825" pad="5"/>
<contactref element="X4" pad="2"/>
</signal>
<signal name="N$27">
<contactref element="DRV8825" pad="6"/>
<contactref element="X4" pad="1"/>
</signal>
<signal name="N$18">
<contactref element="DRV8825" pad="14"/>
<contactref element="SW1" pad="2"/>
</signal>
<signal name="N$22">
<contactref element="DRV8825" pad="13"/>
<contactref element="SW1" pad="1"/>
</signal>
<signal name="YSTEP">
<contactref element="IC1" pad="5"/>
<contactref element="U$3" pad="10"/>
</signal>
<signal name="YDIR">
<contactref element="IC1" pad="12"/>
<contactref element="U$3" pad="9"/>
</signal>
<signal name="ZSTEP">
<contactref element="IC1" pad="6"/>
<contactref element="U$4" pad="10"/>
</signal>
<signal name="ZDIR">
<contactref element="IC1" pad="13"/>
<contactref element="U$4" pad="9"/>
</signal>
<signal name="N$28">
<contactref element="R14" pad="1"/>
<contactref element="DRV8825" pad="7"/>
</signal>
<signal name="N$30">
<contactref element="X2" pad="VBUS"/>
<contactref element="PAD2" pad="1"/>
</signal>
<signal name="N$29">
<contactref element="IC3" pad="1"/>
<contactref element="C18" pad="1"/>
<contactref element="C20" pad="+"/>
<contactref element="FAN" pad="2"/>
<contactref element="D3" pad="C"/>
</signal>
<signal name="N$31">
<contactref element="U$3" pad="15"/>
<contactref element="SW2" pad="3"/>
</signal>
<signal name="N$32">
<contactref element="U$3" pad="12"/>
<contactref element="U$3" pad="11"/>
<contactref element="R18" pad="1"/>
</signal>
<signal name="N$33">
<contactref element="U$3" pad="3"/>
<contactref element="X6" pad="4"/>
</signal>
<signal name="N$34">
<contactref element="U$3" pad="4"/>
<contactref element="X6" pad="3"/>
</signal>
<signal name="N$35">
<contactref element="U$3" pad="5"/>
<contactref element="X6" pad="2"/>
</signal>
<signal name="N$36">
<contactref element="U$3" pad="6"/>
<contactref element="X6" pad="1"/>
</signal>
<signal name="N$37">
<contactref element="U$3" pad="14"/>
<contactref element="SW2" pad="2"/>
</signal>
<signal name="N$38">
<contactref element="U$3" pad="13"/>
<contactref element="SW2" pad="1"/>
</signal>
<signal name="N$39">
<contactref element="R22" pad="1"/>
<contactref element="U$3" pad="7"/>
</signal>
<signal name="N$40">
<contactref element="U$4" pad="15"/>
<contactref element="SW3" pad="3"/>
</signal>
<signal name="N$41">
<contactref element="U$4" pad="12"/>
<contactref element="U$4" pad="11"/>
<contactref element="R24" pad="1"/>
</signal>
<signal name="N$42">
<contactref element="U$4" pad="3"/>
<contactref element="X7" pad="4"/>
</signal>
<signal name="N$43">
<contactref element="U$4" pad="4"/>
<contactref element="X7" pad="3"/>
</signal>
<signal name="N$44">
<contactref element="U$4" pad="5"/>
<contactref element="X7" pad="2"/>
</signal>
<signal name="N$45">
<contactref element="U$4" pad="6"/>
<contactref element="X7" pad="1"/>
</signal>
<signal name="N$46">
<contactref element="U$4" pad="14"/>
<contactref element="SW3" pad="2"/>
</signal>
<signal name="N$47">
<contactref element="U$4" pad="13"/>
<contactref element="SW3" pad="1"/>
</signal>
<signal name="N$48">
<contactref element="R28" pad="1"/>
<contactref element="U$4" pad="7"/>
</signal>
<signal name="N$49">
<contactref element="SW1" pad="6"/>
<contactref element="SW1" pad="5"/>
<contactref element="SW1" pad="4"/>
<contactref element="R10" pad="1"/>
</signal>
<signal name="N$50">
<contactref element="SW2" pad="6"/>
<contactref element="SW2" pad="5"/>
<contactref element="SW2" pad="4"/>
<contactref element="R19" pad="1"/>
</signal>
<signal name="N$51">
<contactref element="SW3" pad="6"/>
<contactref element="SW3" pad="5"/>
<contactref element="SW3" pad="4"/>
<contactref element="R25" pad="1"/>
</signal>
<signal name="ENABLE">
<contactref element="IC1" pad="14"/>
<contactref element="V1" pad="2"/>
</signal>
<signal name="NOTAUS">
<contactref element="V1" pad="1"/>
<contactref element="X8" pad="1"/>
<contactref element="C23" pad="2"/>
<contactref element="R26" pad="1"/>
</signal>
<signal name="N$52">
<contactref element="IC1" pad="23"/>
<contactref element="R13" pad="1"/>
<contactref element="C24" pad="2"/>
<contactref element="X9" pad="1"/>
</signal>
<signal name="N$53">
<contactref element="IC1" pad="24"/>
<contactref element="R20" pad="1"/>
<contactref element="C25" pad="2"/>
<contactref element="X9" pad="2"/>
</signal>
<signal name="N$54">
<contactref element="IC1" pad="25"/>
<contactref element="R21" pad="1"/>
<contactref element="C26" pad="2"/>
<contactref element="X9" pad="3"/>
</signal>
<signal name="SCK">
<contactref element="IC1" pad="19"/>
<contactref element="JP1" pad="1"/>
<contactref element="SV1" pad="3"/>
</signal>
<signal name="SPINDLE-ENABLE">
<contactref element="R8" pad="1"/>
<contactref element="R9" pad="2"/>
<contactref element="JP1" pad="2"/>
</signal>
<signal name="N$56">
<contactref element="LED7" pad="C"/>
<contactref element="R26" pad="2"/>
</signal>
<signal name="N$55">
<contactref element="LED10" pad="C"/>
<contactref element="R21" pad="2"/>
</signal>
<signal name="N$57">
<contactref element="LED9" pad="C"/>
<contactref element="R20" pad="2"/>
</signal>
<signal name="N$58">
<contactref element="LED8" pad="C"/>
<contactref element="R13" pad="2"/>
</signal>
<signal name="PROBE">
<contactref element="IC1" pad="28"/>
<contactref element="R12" pad="1"/>
<contactref element="C27" pad="1"/>
<contactref element="PROBE" pad="1"/>
</signal>
<signal name="N$59">
<contactref element="R12" pad="2"/>
<contactref element="LED11" pad="C"/>
</signal>
<signal name="ADC3">
<contactref element="IC1" pad="26"/>
<contactref element="R27" pad="1"/>
<contactref element="C28" pad="2"/>
<contactref element="R29" pad="2"/>
</signal>
<signal name="ADC4">
<contactref element="IC1" pad="27"/>
</signal>
<signal name="N$60">
<contactref element="X5" pad="1"/>
<contactref element="D2" pad="A"/>
</signal>
<signal name="N$61">
<contactref element="D3" pad="A"/>
<contactref element="J1" pad="1"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
