<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="7.4.0">
<drawing>
<board>
<plain>
<wire x1="57.93125" y1="52.21875" x2="32.22625" y2="52.21875" width="0" layer="20"/>
<wire x1="32.22625" y1="52.21875" x2="32.22625" y2="36.67125" width="0" layer="20"/>
<wire x1="39.0525" y1="22.86" x2="51.1175" y2="22.86" width="0" layer="20"/>
<wire x1="51.1175" y1="22.86" x2="51.1175" y2="31.59125" width="0" layer="20"/>
<text>Kühne</text>
<text>Kühne</text>
<text>M.K.</text>
<text>M.K.</text>
<wire x1="32.22625" y1="36.67125" x2="33.49625" y2="36.67125" width="0" layer="20"/>
<wire x1="33.49625" y1="36.67125" x2="33.49625" y2="31.59125" width="0" layer="20"/>
<wire x1="33.49625" y1="31.59125" x2="39.0525" y2="31.59125" width="0" layer="20"/>
<wire x1="39.0525" y1="31.59125" x2="39.0525" y2="22.86" width="0" layer="20"/>
<wire x1="51.1175" y1="31.59125" x2="56.67375" y2="31.59125" width="0" layer="20"/>
<wire x1="56.67375" y1="31.59125" x2="56.67375" y2="36.67125" width="0" layer="20"/>
<wire x1="56.67375" y1="36.67125" x2="57.94375" y2="36.67125" width="0" layer="20"/>
<wire x1="57.94375" y1="36.67125" x2="57.94375" y2="52.22875" width="0" layer="20"/>
<wire x1="57.94375" y1="52.22875" x2="57.785" y2="52.22875" width="0" layer="20"/>
<text>GND</text>
<text>5V</text>
<text>D+</text>
<text>D-</text>
<text>GND</text>
<text>D+</text>
<text>D-</text>
<text>5V</text>
</plain>
<libraries>
<library name="capacitor-wima">
<description>&lt;b&gt;WIMA Capacitors&lt;/b&gt;&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="C2.5-3">
<description>&lt;B&gt;MKS2&lt;/B&gt;, 5 x 3 mm, grid 2.54 mm</description>
</package>
</packages>
</library>
<library name="bt">
<description>&lt;b&gt;Miscellaneous parts&lt;/b&gt;

&lt;p&gt;Created by Michael Shimniok &lt;a href="http://www.bot-thoughts.com/"&gt;www.bot-thoughts.com&lt;/a&gt;&lt;/b&gt;</description>
<packages>
<package name="R2512">
</package>
</packages>
</library>
<library name="bt_avr">
<description>&lt;b&gt;AVR Microcontrollers&lt;/b&gt;
&lt;p&gt;Created by Michael Shimniok &lt;a href="http://www.bot-thoughts.com/"&gt;www.bot-thoughts.com&lt;/a&gt;&lt;/b&gt;</description>
<packages>
<package name="QFN32">
</package>
</packages>
</library>
<library name="bt_opto">
<description>Opitcal components</description>
<packages>
<package name="CHIPLED_0603">
<description>&lt;b&gt;CHIPLED&lt;/b&gt;&lt;p&gt;
Source: http://www.osram.convergy.de/ ... LG_LY Q971.pdf</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="USB-A-PCB">
<description>Card-edge USB A connector.

For boards designed to be plugged directly into a USB slot. If possible, ensure that your PCB is about 2.4mm thick to fit snugly.</description>
</package>
<package name="1X08_ROUND">
</package>
<package name="1X02">
</package>
<package name="1X06">
</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="QS">
<description>&lt;B&gt;CRYSTAL&lt;/B&gt;</description>
</package>
</packages>
</library>
<library name="jumper">
<description>&lt;b&gt;Jumpers&lt;/b&gt;&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="SJ">
<description>&lt;b&gt;Solder jumper&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="Switches_rev15d">
<description>&lt;BR&gt;Wurth Elektronik - Switches&lt;br&gt;&lt;Hr&gt;
&lt;BR&gt;&lt;BR&gt; 
&lt;TABLE BORDER=0 CELLSPACING=0 CELLPADDING=0&gt;
&lt;TR&gt;   
&lt;TD BGCOLOR="#cccccc" ALIGN=CENTER&gt;&lt;FONT FACE=ARIAL SIZE=3&gt;&lt;BR&gt;&lt;br&gt;
      &amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;nbsp;&lt;BR&gt;
       &lt;BR&gt;
       &lt;BR&gt;
       &lt;BR&gt;&lt;BR&gt;&lt;/FONT&gt;
    &lt;/TD&gt;
&lt;TD BGCOLOR="#cccccc" ALIGN=CENTER&gt;&lt;FONT FACE=ARIAL SIZE=3&gt;&lt;br&gt;
      -----&lt;BR&gt;
      -----&lt;BR&gt;
      -----&lt;BR&gt;
      -----&lt;BR&gt;
      -----&lt;BR&gt;&lt;BR&gt;&lt;/FONT&gt;
    &lt;/TD&gt;
    &lt;TD BGCOLOR="#cccccc" ALIGN=CENTER&gt; &lt;FONT FACE=ARIAL SIZE=3&gt;&lt;br&gt;
      ---------------------------&lt;BR&gt;
&lt;B&gt;&lt;I&gt;&lt;span style='font-size:26pt;
  color:#FF6600;'&gt;WE &lt;/span&gt;&lt;/i&gt;&lt;/b&gt;
&lt;BR&gt;
      ---------------------------&lt;BR&gt;&lt;b&gt;Würth Elektronik&lt;/b&gt;&lt;/FONT&gt;
    &lt;/TD&gt;
    &lt;TD BGCOLOR="#cccccc" ALIGN=CENTER&gt;&lt;FONT FACE=ARIAL SIZE=3&gt;&lt;br&gt;
      ---------O---&lt;BR&gt;
      ----O--------&lt;BR&gt;
      ---------O---&lt;BR&gt;
      ----O--------&lt;BR&gt;
      ---------O---&lt;BR&gt;&lt;BR&gt;&lt;/FONT&gt;
    &lt;/TD&gt;
   
&lt;TD BGCOLOR="#cccccc" ALIGN=CENTER&gt;&lt;FONT FACE=ARIAL SIZE=3&gt;&lt;BR&gt;
      &amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;nbsp;&lt;BR&gt;
       &lt;BR&gt;
       &lt;BR&gt;
       &lt;BR&gt;
       &lt;BR&gt;&lt;BR&gt;&lt;/FONT&gt;
    &lt;/TD&gt;
  &lt;/TR&gt;

  &lt;TR&gt;
    &lt;TD COLSPAN=7&gt;&amp;nbsp;
    &lt;/TD&gt;
  &lt;/TR&gt;
  
&lt;/TABLE&gt;
&lt;B&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;More than you expect&lt;BR&gt;&lt;BR&gt;&lt;BR&gt;&lt;/B&gt;

&lt;HR&gt;&lt;BR&gt;
&lt;b&gt;Würth Elektronik eiSos GmbH &amp; Co. KG&lt;/b&gt;&lt;br&gt;
EMC &amp; Inductive Solutions&lt;br&gt;

Max-Eyth-Str.1&lt;br&gt;
D-74638 Waldenburg&lt;br&gt;
&lt;br&gt;
Tel: +49 (0)7942-945-0&lt;br&gt;
Fax:+49 (0)7942-945-405&lt;br&gt;
&lt;br&gt;
&lt;a href="http://www.we-online.com/eagle"&gt;http://www.we-online.com/eagle&lt;/a&gt;&lt;br&gt;
&lt;a href="mailto:libraries@we-online.com"&gt;libraries@we-online.com&lt;/a&gt; &lt;BR&gt;&lt;BR&gt;
&lt;br&gt;&lt;HR&gt;&lt;BR&gt;
Neither CadSoft nor WE-eiSos does warrant that this library is error-free or &lt;br&gt;
that it meets your specific requirements.&lt;br&gt;&lt;BR&gt;
Please contact us for more information.&lt;br&gt;&lt;BR&gt;&lt;br&gt;
&lt;hr&gt;
Eagle Version 6, Library Revision 2015b, 08.04.2015&lt;br&gt;
&lt;HR&gt;
Copyright: Würth Elektronik</description>
<packages>
<package name="434111025826">
<description>WS-TRS-6x3.8 mm SMD Tact Switch, 2 pins</description>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="C1" library="capacitor-wima" package="C2.5-3" value="1uF"/>
<element name="C2" library="capacitor-wima" package="C2.5-3" value="27pF"/>
<element name="C3" library="capacitor-wima" package="C2.5-3" value="27pF"/>
<element name="R1" library="bt" package="R2512" value="27R"/>
<element name="R2" library="bt" package="R2512" value="27R"/>
<element name="U$1" library="bt_avr" package="QFN32" value="ATMEGA8U2QFN32"/>
<element name="R3" library="bt" package="R2512" value="200R"/>
<element name="JP1" library="SparkFun-Connectors" package="USB-A-PCB" value="USBPCB"/>
<element name="JP3" library="SparkFun-Connectors" package="1X08_ROUND" value="PB"/>
<element name="Q2" library="special" package="QS" value="16Mhz"/>
<element name="SJ1" library="jumper" package="SJ" value="open"/>
<element name="PWR" library="bt_opto" package="CHIPLED_0603" value="RED"/>
<element name="R4" library="bt" package="R2512" value="200R"/>
<element name="SJ2" library="jumper" package="SJ" value="open"/>
<element name="R5" library="bt" package="R2512" value="200R"/>
<element name="PB6" library="bt_opto" package="CHIPLED_0603" value="RED"/>
<element name="PB5" library="bt_opto" package="CHIPLED_0603" value="GREEN"/>
<element name="JP4" library="SparkFun-Connectors" package="1X02" value=""/>
<element name="JP7" library="SparkFun-Connectors" package="1X06" value="">
<attribute name="PROD_ID" value="CONN-08437"/>
</element>
<element name="JP2" library="SparkFun-Connectors" package="1X02" value=""/>
<element name="JP5" library="SparkFun-Connectors" package="1X06" value="">
<attribute name="PROD_ID" value="CONN-08437"/>
</element>
<element name="SW1" library="Switches_rev15d" package="434111025826" value="434111025826"/>
<element name="SW2" library="Switches_rev15d" package="434111025826" value="434111025826"/>
<element name="SW3" library="Switches_rev15d" package="434111025826" value="434111025826"/>
</elements>
<signals>
<signal name="N$2">
<contactref element="R1" pad="P$2"/>
<contactref element="JP1" pad="USB_M"/>
</signal>
<signal name="N$3">
<contactref element="R2" pad="P$2"/>
<contactref element="JP1" pad="USB_P"/>
</signal>
<signal name="GND">
<contactref element="U$1" pad="P$5"/>
<contactref element="U$1" pad="P$30"/>
<contactref element="C1" pad="2"/>
<contactref element="C2" pad="1"/>
<contactref element="C3" pad="1"/>
<contactref element="JP1" pad="GND"/>
<contactref element="PWR" pad="C"/>
<contactref element="JP7" pad="3"/>
<contactref element="SW1" pad="1"/>
<contactref element="SW2" pad="1"/>
<contactref element="SW3" pad="1"/>
</signal>
<signal name="N$5">
<contactref element="U$1" pad="P$6"/>
<contactref element="C1" pad="1"/>
</signal>
<signal name="N$7">
<contactref element="C2" pad="2"/>
<contactref element="U$1" pad="P$31"/>
<contactref element="Q2" pad="1"/>
</signal>
<signal name="N$6">
<contactref element="U$1" pad="P$32"/>
<contactref element="C3" pad="2"/>
<contactref element="Q2" pad="2"/>
</signal>
<signal name="N$8">
<contactref element="U$1" pad="P$3"/>
<contactref element="R1" pad="P$1"/>
</signal>
<signal name="N$9">
<contactref element="U$1" pad="P$4"/>
<contactref element="R2" pad="P$1"/>
</signal>
<signal name="N$10">
<contactref element="U$1" pad="P$27"/>
<contactref element="JP2" pad="2"/>
</signal>
<signal name="N$11">
<contactref element="U$1" pad="P$26"/>
<contactref element="JP2" pad="1"/>
</signal>
<signal name="N$12">
<contactref element="U$1" pad="P$25"/>
<contactref element="JP5" pad="6"/>
</signal>
<signal name="N$13">
<contactref element="U$1" pad="P$24"/>
<contactref element="JP5" pad="5"/>
</signal>
<signal name="N$14">
<contactref element="U$1" pad="P$23"/>
<contactref element="JP5" pad="4"/>
</signal>
<signal name="N$15">
<contactref element="U$1" pad="P$22"/>
<contactref element="JP5" pad="3"/>
</signal>
<signal name="N$16">
<contactref element="U$1" pad="P$21"/>
<contactref element="JP5" pad="2"/>
</signal>
<signal name="N$17">
<contactref element="U$1" pad="P$20"/>
<contactref element="JP5" pad="1"/>
<contactref element="SW2" pad="2"/>
</signal>
<signal name="N$19">
<contactref element="U$1" pad="P$18"/>
<contactref element="JP3" pad="7"/>
</signal>
<signal name="N$20">
<contactref element="U$1" pad="P$19"/>
<contactref element="JP3" pad="8"/>
</signal>
<signal name="N$21">
<contactref element="U$1" pad="P$16"/>
<contactref element="JP3" pad="5"/>
</signal>
<signal name="N$22">
<contactref element="U$1" pad="P$15"/>
<contactref element="JP3" pad="4"/>
<contactref element="SW3" pad="2"/>
</signal>
<signal name="N$23">
<contactref element="U$1" pad="P$14"/>
<contactref element="JP3" pad="3"/>
<contactref element="SJ2" pad="1"/>
</signal>
<signal name="N$24">
<contactref element="U$1" pad="P$13"/>
<contactref element="JP3" pad="2"/>
<contactref element="SJ1" pad="1"/>
</signal>
<signal name="N$25">
<contactref element="U$1" pad="P$12"/>
<contactref element="JP3" pad="1"/>
</signal>
<signal name="N$26">
<contactref element="U$1" pad="P$28"/>
<contactref element="JP4" pad="2"/>
</signal>
<signal name="N$27">
<contactref element="JP7" pad="4"/>
<contactref element="U$1" pad="P$11"/>
</signal>
<signal name="N$28">
<contactref element="U$1" pad="P$10"/>
<contactref element="JP7" pad="5"/>
</signal>
<signal name="N$29">
<contactref element="U$1" pad="P$8"/>
<contactref element="JP7" pad="6"/>
</signal>
<signal name="N$30">
<contactref element="U$1" pad="P$7"/>
<contactref element="JP4" pad="1"/>
</signal>
<signal name="N$31">
<contactref element="U$1" pad="P$9"/>
<contactref element="JP7" pad="1"/>
<contactref element="SW1" pad="2"/>
</signal>
<signal name="N$32">
<contactref element="R3" pad="P$2"/>
<contactref element="PB6" pad="A"/>
</signal>
<signal name="N$34">
<contactref element="SJ1" pad="2"/>
<contactref element="PB6" pad="C"/>
</signal>
<signal name="N$33">
<contactref element="PWR" pad="A"/>
<contactref element="R4" pad="P$1"/>
</signal>
<signal name="5V">
<contactref element="U$1" pad="P$1"/>
<contactref element="R4" pad="P$2"/>
<contactref element="U$1" pad="P$2"/>
<contactref element="U$1" pad="P$29"/>
<contactref element="JP1" pad="5V"/>
<contactref element="R3" pad="P$1"/>
<contactref element="R5" pad="P$2"/>
<contactref element="JP7" pad="2"/>
</signal>
<signal name="N$1">
<contactref element="SJ2" pad="2"/>
<contactref element="PB5" pad="C"/>
</signal>
<signal name="N$4">
<contactref element="R5" pad="P$1"/>
<contactref element="PB5" pad="A"/>
</signal>
<signal name="N$35">
</signal>
<signal name="N$37">
<contactref element="U$1" pad="P$17"/>
<contactref element="JP3" pad="6"/>
</signal>
<signal name="N$38">
</signal>
</signals>
</board>
</drawing>
</eagle>
