<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="7.7.0">
<drawing>
<board>
<plain>
<wire x1="0" y1="17.78" x2="0" y2="0" width="0" layer="20"/>
<wire x1="0" y1="0" x2="43.18" y2="0" width="0" layer="20"/>
<wire x1="43.18" y1="0" x2="43.18" y2="17.78" width="0" layer="20"/>
<wire x1="43.18" y1="17.78" x2="0" y2="17.78" width="0" layer="20"/>
<text>TX1</text>
<text>RX0</text>
<text>RST</text>
<text>GND</text>
<text>D2</text>
<text>D3</text>
<text>D4</text>
<text>D5</text>
<text>D6</text>
<text>D7</text>
<text>D8</text>
<text>D9</text>
<text>D10</text>
<text>D11</text>
<text>D12</text>
<text>D13</text>
<text>3V3</text>
<text>REF</text>
<text>A0</text>
<text>A1</text>
<text>A2</text>
<text>A3</text>
<text>A4</text>
<text>A5</text>
<text>A6</text>
<text>A7</text>
<text>5V</text>
<text>RST</text>
<text>GND</text>
<text>VIN</text>
<text>1</text>
<text>ICSP</text>
<text>TX</text>
<text>RX</text>
<text>PWR</text>
<text>RST</text>
<text>L</text>
<text>ARDUINO.CC</text>
<text>ARDUINO</text>
<text>NANO</text>
<text>*</text>
<text>*</text>
<text>*</text>
<text>*</text>
<text>*</text>
<text>*</text>
<hole x="1.27" y="16.51" drill="1.651"/>
<hole x="1.27" y="1.27" drill="1.651"/>
<hole x="41.91" y="1.27" drill="1.651"/>
<hole x="41.91" y="16.51" drill="1.651"/>
</plain>
<libraries>
<library name="IntegratedCircuits">
<packages>
<package name="SSOP28">
</package>
<package name="LINEAR_SOT223">
<description>&lt;b&gt;Small Outline Transistor&lt;/b&gt;</description>
</package>
<package name="TQFP32-08">
<description>&lt;B&gt;Thin Plasic Quad Flat Package&lt;/B&gt; Grid 0.8 mm</description>
</package>
</packages>
</library>
<library name="Opto">
<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>
</packages>
</library>
<library name="Resistenze">
<packages>
<package name="CAY16">
<description>&lt;b&gt;BOURNS&lt;/b&gt; Chip Resistor Array&lt;p&gt;
Source: RS Component / BUORNS</description>
</package>
</packages>
</library>
<library name="Connettori">
<packages>
<package name="USB-MINI-B_2">
</package>
<package name="2X03">
<description>&lt;b&gt;PIN HEADER&lt;/b&gt;</description>
</package>
<package name="HEAD15-NOSS">
</package>
</packages>
</library>
<library name="Condensatori">
<packages>
<package name="C0603-ROUND">
<description>&lt;b&gt;CAPACITOR&lt;/b&gt;&lt;p&gt;
chip</description>
</package>
<package name="TAN-A">
</package>
</packages>
</library>
<library name="Cristalli">
<packages>
<package name="RESONATOR">
</package>
</packages>
</library>
<library name="Switches">
<packages>
<package name="SMD_157SW">
</package>
</packages>
</library>
<library name="Diodi">
<packages>
<package name="DO220AAL">
</package>
</packages>
</library>
<library name="Arduino-utility">
<description>Copyright (c) 2016-2017 Arduino LLC.  All right reserved.</description>
<packages>
<package name="FRAME">
</package>
<package name="TP-1.00MM">
</package>
<package name="FD-1-1.5">
</package>
</packages>
</library>
<library name="Arduino-rcl">
<description>Copyright (c) 2016-2017 Arduino LLC.  All right reserved.</description>
<packages>
<package name="0603-1608X90N">
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="C1" library="Condensatori" package="C0603-ROUND" value="100nF">
<attribute name="NAME"/>
<attribute name="VALUE" value="100nF"/>
<attribute name="CASE" value="0603"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Condensatori"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="cl10b104kbnc"/>
</element>
<element name="C3" library="Condensatori" package="C0603-ROUND" value="1uF">
<attribute name="NAME"/>
<attribute name="VALUE" value="1uF"/>
<attribute name="CASE" value="0603"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Condensatori"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="1uF_0603/GRM188R61E105KA12D"/>
</element>
<element name="C4" library="Condensatori" package="C0603-ROUND" value="100nF">
<attribute name="NAME"/>
<attribute name="VALUE" value="100nF"/>
<attribute name="CASE" value="0603"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Condensatori"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="cl10b104kbnc"/>
</element>
<element name="C9" library="Condensatori" package="C0603-ROUND" value="100nF">
<attribute name="NAME"/>
<attribute name="VALUE" value="100nF"/>
<attribute name="CASE" value="0603"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Condensatori"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="cl10b104kbnc"/>
</element>
<element name="SW1" library="Switches" package="SMD_157SW" value="RESET">
<attribute name="NAME"/>
<attribute name="VALUE" value="157SW"/>
<attribute name="CASE" value=""/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Switches"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="IT-1185AP1C-160G-G_T&amp;R"/>
</element>
<element name="RP1" library="Resistenze" package="CAY16" value="1K">
<attribute name="NAME"/>
<attribute name="VALUE" value="1K"/>
<attribute name="CASE" value="SMD_3,2x1,6"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Resistenze"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="064R_1K_/_CAY16-102J4LF"/>
</element>
<element name="RP2" library="Resistenze" package="CAY16" value="1K">
<attribute name="NAME"/>
<attribute name="VALUE" value="1K"/>
<attribute name="CASE" value="SMD_3,2x1,6"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Resistenze"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="064R_1K_/_CAY16-102J4LF"/>
</element>
<element name="J3" library="Connettori" package="USB-MINI-B_2" value="">
<attribute name="NAME"/>
<attribute name="VALUE" value="USB-mini-90 -SMD"/>
<attribute name="CASE" value=""/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Connettori"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="14850"/>
</element>
<element name="Y1" library="Cristalli" package="RESONATOR" value="16MHz">
<attribute name="NAME"/>
<attribute name="VALUE" value="CSTCE16M0V53-R0"/>
<attribute name="CASE" value=""/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Cristalli"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="CSTCE16M0V53-R0"/>
</element>
<element name="J1" library="Connettori" package="HEAD15-NOSS" value="XXXX_STRIPNANO">
<attribute name="NAME"/>
<attribute name="VALUE" value="Strip15pin"/>
</element>
<element name="J2" library="Connettori" package="HEAD15-NOSS" value="XXXX_STRIPNANO">
<attribute name="NAME"/>
<attribute name="VALUE" value="Strip15pin"/>
</element>
<element name="J4" library="Connettori" package="2X03" value="">
<attribute name="NAME"/>
<attribute name="VALUE" value="ICSP"/>
<attribute name="CASE" value=""/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Connettori"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="PH254-203DF118A00V"/>
</element>
<element name="U$4" library="Arduino-utility" package="FD-1-1.5" value="DNP">
<attribute name="VALUE" value="DNP"/>
<attribute name="MANUFACTURER-PN" value="DNP"/>
<attribute name="DISTRIBUTOR-LINK" value="DNP"/>
<attribute name="DATASHEET" value="DNP"/>
<attribute name="MANUFACTURER" value="DNP"/>
<attribute name="DISTRIBUTOR-PN" value="DNP"/>
</element>
<element name="U$53" library="Arduino-utility" package="FD-1-1.5" value="DNP">
<attribute name="VALUE" value="DNP"/>
<attribute name="MANUFACTURER-PN" value="DNP"/>
<attribute name="DISTRIBUTOR-LINK" value="DNP"/>
<attribute name="DATASHEET" value="DNP"/>
<attribute name="MANUFACTURER" value="DNP"/>
<attribute name="DISTRIBUTOR-PN" value="DNP"/>
</element>
<element name="U$54" library="Arduino-utility" package="FD-1-1.5" value="DNP">
<attribute name="VALUE" value="DNP"/>
<attribute name="MANUFACTURER-PN" value="DNP"/>
<attribute name="DISTRIBUTOR-LINK" value="DNP"/>
<attribute name="DATASHEET" value="DNP"/>
<attribute name="MANUFACTURER" value="DNP"/>
<attribute name="DISTRIBUTOR-PN" value="DNP"/>
</element>
<element name="RX" library="Opto" package="CHIPLED_0805" value="Red">
<attribute name="CASE" value=""/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Opto"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="KTP-2012SURCK"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="TX" library="Opto" package="CHIPLED_0805" value="Green">
<attribute name="CASE" value=""/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Opto"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="KPT-2012SGC"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="IC1" library="IntegratedCircuits" package="SSOP28" value="FT232RL">
<attribute name="CASE" value="SSOP28"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Circuito_Integrato"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="FT232RL"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="F1" library="Arduino-rcl" package="0603-1608X90N" value="MFFSMF050">
<attribute name="NAME"/>
<attribute name="VALUE" value="MFFSMF050"/>
<attribute name="MANUFACTURER-PN" value="MF-FSMF050X-2"/>
<attribute name="DISTRIBUTOR-LINK" value="http://www.digikey.com/product-detail/en/bourns-inc/MF-FSMF050X-2/MF-FSMF050X-2CT-ND/2039389"/>
<attribute name="DATASHEET" value="http://www.bourns.com/docs/Product-Datasheets/mffsmf.pdf"/>
<attribute name="MANUFACTURER" value="Bourns Inc "/>
<attribute name="DISTRIBUTOR-PN" value="MF-FSMF050X-2CT-ND"/>
</element>
<element name="C5" library="Condensatori" package="TAN-A" value="4,7uF_16V">
<attribute name="CASE" value="Case_A_(1206)"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Condensatori"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="TAJA475MO16RNJ"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="PWR" library="Opto" package="CHIPLED_0805" value="Green">
<attribute name="CASE" value=""/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Opto"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="KPT-2012SGC"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="L" library="Opto" package="CHIPLED_0805" value="Yellow">
<attribute name="CASE" value=""/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Opto"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="KPT-2012YC"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C2" library="Condensatori" package="TAN-A" value="4,7uF_16V">
<attribute name="CASE" value="Case_A_(1206)"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Condensatori"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="TAJA475MO16RNJ"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="IC2" library="IntegratedCircuits" package="LINEAR_SOT223" value="LM1117IMPX-5.0">
<attribute name="CASE" value="SOT223"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Circuito_Integrato"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="LM1117IMPX-5.0"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C6" library="Condensatori" package="C0603-ROUND" value="100nF">
<attribute name="CASE" value="0603"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Condensatori"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="cl10b104kbnc"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="IC3" library="IntegratedCircuits" package="TQFP32-08" value="ATMEGA328P-AU">
<attribute name="CASE" value="TQFP32_7x7"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Circuito_Integrato"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="ATMEGA328P-AU"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="D1" library="Diodi" package="DO220AAL" value="SS1P3L">
<attribute name="CASE" value="SMP"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Diodi"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="SS1P3L-M3/84A"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C7" library="Condensatori" package="C0603-ROUND" value="1uF">
<attribute name="CASE" value="0603"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Condensatori"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="1uF_0603/GRM188R61E105KA12D"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C8" library="Condensatori" package="C0603-ROUND" value="1uF">
<attribute name="CASE" value="0603"/>
<attribute name="PRICE" value="_____"/>
<attribute name="SUPPLIER" value="_____"/>
<attribute name="TYPE" value="Condensatori"/>
<attribute name="MONTHLY_USAGE" value="_____"/>
<attribute name="PART_NUMBER" value="1uF_0603/GRM188R61E105KA12D"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="FRAME1" library="Arduino-utility" package="FRAME" value="DNP">
<attribute name="MANUFACTURER-PN" value="DNP"/>
<attribute name="DISTRIBUTOR-LINK" value="DNP"/>
<attribute name="MANUFACTURER" value="DNP"/>
<attribute name="DATASHEET" value="DNP"/>
<attribute name="DISTRIBUTOR-PN" value="DNP"/>
</element>
<element name="D-" library="Arduino-utility" package="TP-1.00MM" value="DNP">
<attribute name="MANUFACTURER-PN" value="DNP"/>
<attribute name="DISTRIBUTOR-LINK" value="DNP"/>
<attribute name="DATASHEET" value="DNP"/>
<attribute name="MANUFACTURER" value="DNP"/>
<attribute name="DISTRIBUTOR-PN" value="DNP"/>
</element>
<element name="D+" library="Arduino-utility" package="TP-1.00MM" value="DNP">
<attribute name="MANUFACTURER-PN" value="DNP"/>
<attribute name="DISTRIBUTOR-LINK" value="DNP"/>
<attribute name="DATASHEET" value="DNP"/>
<attribute name="MANUFACTURER" value="DNP"/>
<attribute name="DISTRIBUTOR-PN" value="DNP"/>
</element>
<element name="U$5" library="Arduino-utility" package="FD-1-1.5" value="DNP">
<attribute name="VALUE" value="DNP"/>
<attribute name="MANUFACTURER-PN" value="DNP"/>
<attribute name="DISTRIBUTOR-LINK" value="DNP"/>
<attribute name="DATASHEET" value="DNP"/>
<attribute name="MANUFACTURER" value="DNP"/>
<attribute name="DISTRIBUTOR-PN" value="DNP"/>
</element>
</elements>
<signals>
<signal name="D5">
<contactref element="J1" pad="8"/>
<contactref element="IC3" pad="9"/>
</signal>
<signal name="D4">
<contactref element="J1" pad="7"/>
<contactref element="IC3" pad="2"/>
</signal>
<signal name="D3">
<contactref element="J1" pad="6"/>
<contactref element="IC3" pad="1"/>
</signal>
<signal name="D2">
<contactref element="J1" pad="5"/>
<contactref element="IC3" pad="32"/>
</signal>
<signal name="RESET">
<contactref element="C4" pad="1"/>
<contactref element="SW1" pad="2"/>
<contactref element="J2" pad="3"/>
<contactref element="J1" pad="3"/>
<contactref element="J4" pad="5"/>
<contactref element="RP1" pad="4"/>
<contactref element="IC3" pad="29"/>
</signal>
<signal name="D1/TX">
<contactref element="J1" pad="1"/>
<contactref element="IC3" pad="31"/>
<contactref element="RP1" pad="2"/>
</signal>
<signal name="D6">
<contactref element="J1" pad="9"/>
<contactref element="IC3" pad="10"/>
</signal>
<signal name="D7">
<contactref element="J1" pad="10"/>
<contactref element="IC3" pad="11"/>
</signal>
<signal name="D8">
<contactref element="J1" pad="11"/>
<contactref element="IC3" pad="12"/>
</signal>
<signal name="D9">
<contactref element="J1" pad="12"/>
<contactref element="IC3" pad="13"/>
</signal>
<signal name="D10">
<contactref element="J1" pad="13"/>
<contactref element="IC3" pad="14"/>
</signal>
<signal name="D11/MOSI">
<contactref element="J1" pad="14"/>
<contactref element="J4" pad="4"/>
<contactref element="IC3" pad="15"/>
</signal>
<signal name="D12/MISO">
<contactref element="J1" pad="15"/>
<contactref element="J4" pad="1"/>
<contactref element="IC3" pad="16"/>
</signal>
<signal name="A3">
<contactref element="J2" pad="9"/>
<contactref element="IC3" pad="26"/>
</signal>
<signal name="A2">
<contactref element="J2" pad="10"/>
<contactref element="IC3" pad="25"/>
</signal>
<signal name="A1">
<contactref element="J2" pad="11"/>
<contactref element="IC3" pad="24"/>
</signal>
<signal name="A0">
<contactref element="J2" pad="12"/>
<contactref element="IC3" pad="23"/>
</signal>
<signal name="A4">
<contactref element="J2" pad="8"/>
<contactref element="IC3" pad="27"/>
</signal>
<signal name="A5">
<contactref element="J2" pad="7"/>
<contactref element="IC3" pad="28"/>
</signal>
<signal name="A6">
<contactref element="J2" pad="6"/>
<contactref element="IC3" pad="19"/>
</signal>
<signal name="A7">
<contactref element="J2" pad="5"/>
<contactref element="IC3" pad="22"/>
</signal>
<signal name="AREF">
<contactref element="C1" pad="1"/>
<contactref element="J2" pad="13"/>
<contactref element="IC3" pad="20"/>
</signal>
<signal name="D13/SCK">
<contactref element="J2" pad="15"/>
<contactref element="J4" pad="3"/>
<contactref element="IC3" pad="17"/>
<contactref element="RP2" pad="1"/>
</signal>
<signal name="COM">
<contactref element="C1" pad="2"/>
<contactref element="C3" pad="2"/>
<contactref element="C9" pad="2"/>
<contactref element="SW1" pad="1"/>
<contactref element="J3" pad="1"/>
<contactref element="Y1" pad="2"/>
<contactref element="J2" pad="2"/>
<contactref element="J1" pad="4"/>
<contactref element="J4" pad="6"/>
<contactref element="J3" pad="7"/>
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<contactref element="J3" pad="8"/>
<contactref element="J3" pad="6"/>
<contactref element="IC1" pad="25"/>
<contactref element="IC1" pad="7"/>
<contactref element="IC1" pad="18"/>
<contactref element="IC1" pad="21"/>
<contactref element="IC1" pad="26"/>
<contactref element="C5" pad="2"/>
<contactref element="L" pad="C"/>
<contactref element="PWR" pad="C"/>
<contactref element="C2" pad="2"/>
<contactref element="IC2" pad="1"/>
<contactref element="C6" pad="1"/>
<contactref element="IC3" pad="21"/>
<contactref element="IC3" pad="3"/>
<contactref element="IC3" pad="5"/>
<contactref element="RP2" pad="3"/>
<contactref element="RP2" pad="6"/>
<contactref element="C7" pad="2"/>
<contactref element="C8" pad="2"/>
</signal>
<signal name="+5V">
<contactref element="J2" pad="4"/>
<contactref element="J4" pad="2"/>
<contactref element="RP1" pad="5"/>
<contactref element="RX" pad="A"/>
<contactref element="TX" pad="A"/>
<contactref element="IC1" pad="20"/>
<contactref element="IC1" pad="4"/>
<contactref element="IC2" pad="2"/>
<contactref element="IC2" pad="4"/>
<contactref element="RP1" pad="6"/>
<contactref element="IC3" pad="4"/>
<contactref element="IC3" pad="18"/>
<contactref element="C3" pad="1"/>
<contactref element="C5" pad="1"/>
<contactref element="IC3" pad="6"/>
<contactref element="D1" pad="P$1"/>
<contactref element="C7" pad="1"/>
<contactref element="C8" pad="1"/>
</signal>
<signal name="VIN">
<contactref element="J2" pad="1"/>
<contactref element="IC2" pad="3"/>
</signal>
<signal name="3V3">
<contactref element="J2" pad="14"/>
<contactref element="IC1" pad="17"/>
<contactref element="C6" pad="2"/>
</signal>
<signal name="D0/RX">
<contactref element="J1" pad="2"/>
<contactref element="IC3" pad="30"/>
<contactref element="RP1" pad="1"/>
</signal>
<signal name="VUSB">
<contactref element="C9" pad="1"/>
<contactref element="F1" pad="1"/>
<contactref element="C2" pad="1"/>
<contactref element="D1" pad="P$2"/>
</signal>
<signal name="N$4">
<contactref element="C4" pad="2"/>
<contactref element="IC1" pad="2"/>
</signal>
<signal name="RX">
<contactref element="IC1" pad="1"/>
<contactref element="RP1" pad="8"/>
</signal>
<signal name="TX">
<contactref element="RP1" pad="7"/>
<contactref element="IC1" pad="5"/>
</signal>
<signal name="N$5">
<contactref element="J3" pad="3"/>
<contactref element="IC1" pad="15"/>
<contactref element="D+" pad="X"/>
</signal>
<signal name="N$6">
<contactref element="J3" pad="4"/>
<contactref element="IC1" pad="16"/>
<contactref element="D-" pad="X"/>
</signal>
<signal name="N$3">
<contactref element="PWR" pad="A"/>
<contactref element="RP1" pad="3"/>
</signal>
<signal name="N$8">
<contactref element="IC1" pad="23"/>
<contactref element="RP2" pad="2"/>
</signal>
<signal name="N$9">
<contactref element="RP2" pad="4"/>
<contactref element="IC1" pad="22"/>
</signal>
<signal name="N$2">
<contactref element="Y1" pad="1"/>
<contactref element="IC3" pad="7"/>
</signal>
<signal name="N$1">
<contactref element="Y1" pad="3"/>
<contactref element="IC3" pad="8"/>
</signal>
<signal name="N$7">
<contactref element="L" pad="A"/>
<contactref element="RP2" pad="8"/>
</signal>
<signal name="N$11">
<contactref element="RP2" pad="5"/>
<contactref element="TX" pad="C"/>
</signal>
<signal name="N$26">
<contactref element="F1" pad="2"/>
<contactref element="J3" pad="5"/>
</signal>
<signal name="N$29">
<contactref element="RX" pad="C"/>
<contactref element="RP2" pad="7"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
