<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="9.4.1">
<drawing>
<board>
<plain>
<wire x1="0" y1="3.5" x2="9" y2="3.5" width="0" layer="20"/>
<wire x1="9" y1="3.5" x2="9" y2="0" width="0" layer="20"/>
<wire x1="9" y1="0" x2="31.199" y2="0" width="0" layer="20"/>
<wire x1="31.199" y1="0" x2="31.199" y2="19" width="0" layer="20"/>
<wire x1="31.199" y1="19" x2="9" y2="19" width="0" layer="20"/>
<wire x1="9" y1="19" x2="9" y2="15.53" width="0" layer="20"/>
<wire x1="9" y1="15.53" x2="0" y2="15.53" width="0" layer="20"/>
<wire x1="0" y1="15.53" x2="0" y2="3.5" width="0" layer="20"/>
<text>I2CStump</text>
<text>C1</text>
<text>D2</text>
<text>D1</text>
<text>IC1</text>
<text>SCL</text>
<text>SCL</text>
<text>SDA</text>
<text>SDA</text>
<text>5V</text>
<text>GND</text>
<text>GND</text>
<text>3v3</text>
<text>ACT</text>
<text>github.com/pimvanpelt/i2cstump
I2C, 3.3V &amp; 5V
Version 4.0</text>
<text>5V</text>
<text>3V3</text>
<text>I2CStump</text>
<hole x="16.764" y="9.525" drill="2.9972"/>
<text>RN1</text>
</plain>
<libraries>
<library name="SparkFun">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
We've spent an enormous amount of time creating and checking these footprints and parts. 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; CC v3.0 Share-Alike 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">
</package>
<package name="SO08-EIAJ">
<description>Fits EIAJ packages (wide version of the SOIC-8).</description>
</package>
<package name="SOD-323">
</package>
<package name="0805">
</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="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>
</packages>
</library>
<library name="SparkFun-DiscreteSemi">
<description>&lt;h3&gt;SparkFun Discrete Semiconductors&lt;/h3&gt;
This library contains diodes, optoisolators, TRIACs, MOSFETs, transistors, etc. 
&lt;br&gt;
&lt;br&gt;
We've spent an enormous amount of time creating and checking these footprints and parts, but it is &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="SOT23-3">
<description>SOT23-3</description>
</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="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-Capacitors">
<description>&lt;h3&gt;SparkFun Capacitors&lt;/h3&gt;
This library contains capacitors. 
&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="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-LED">
<description>&lt;h3&gt;SparkFun LEDs&lt;/h3&gt;
This library contains discrete LEDs for illumination or indication, but no displays.
&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="LED-0603">
<description>&lt;B&gt;LED 0603 SMT&lt;/B&gt;&lt;p&gt;
0603, surface mount.
&lt;p&gt;Specifications:
&lt;ul&gt;&lt;li&gt;Pin count: 2&lt;/li&gt;
&lt;li&gt;Pin pitch:0.075inch &lt;/li&gt;
&lt;li&gt;Area: 0.06" x 0.03"&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;
&lt;p&gt;Example device(s):
&lt;ul&gt;&lt;li&gt;LED - BLUE&lt;/li&gt;</description>
</package>
</packages>
</library>
<library name="linear">
<description>&lt;b&gt;Linear Devices&lt;/b&gt;&lt;p&gt;
Operational amplifiers,  comparators, voltage regulators, ADCs, DACs, etc.&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="SOT23">
<description>&lt;b&gt;SMALL OUTLINE TRANSISTOR&lt;/b&gt;&lt;p&gt;
reflow soldering</description>
</package>
</packages>
</library>
<library name="resistor-net">
<description>&lt;b&gt;Generic Resistor Networks&lt;/b&gt;&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="CTS742C083">
<description>&lt;b&gt;Chip Resistor Array&lt;/b&gt;&lt;p&gt;
Source: http://www.ctscorp.com/components/Datasheets/CTSChipArrayDs.pdf</description>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="X1" library="SparkFun" package="USB-A-PCB" value="USBPCB">
<attribute name="VALUE"/>
</element>
<element name="IC1" library="SparkFun" package="SO08-EIAJ" value="ATTINY85">
<attribute name="VALUE"/>
</element>
<element name="D2" library="SparkFun" package="SOD-323" value="3.6 Zener">
<attribute name="VALUE"/>
</element>
<element name="D1" library="SparkFun" package="SOD-323" value="3.6 Zener">
<attribute name="VALUE"/>
</element>
<element name="C1" library="SparkFun" package="0805" value="4.7uf">
<attribute name="VALUE"/>
</element>
<element name="J1" library="SparkFun-Connectors" package="1X04_1MM_RA" value="I2C-5V">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="J2" library="SparkFun-Connectors" package="1X04_1MM_RA" value="I2C-3V3">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="Q1" library="SparkFun-DiscreteSemi" package="SOT23-3" value="220mA/50V/3.5Ω">
<attribute name="NAME"/>
<attribute name="PROD_ID" value="TRANS-00830"/>
<attribute name="VALUE"/>
</element>
<element name="Q2" library="SparkFun-DiscreteSemi" package="SOT23-3" value="220mA/50V/3.5Ω">
<attribute name="NAME"/>
<attribute name="PROD_ID" value="TRANS-00830"/>
<attribute name="VALUE"/>
</element>
<element name="R4" library="SparkFun-Resistors" package="0603" value="2k2">
<attribute name="NAME"/>
<attribute name="PROD_ID" value=" "/>
<attribute name="VALUE"/>
</element>
<element name="R1" library="SparkFun-Resistors" package="0603" value="66R">
<attribute name="NAME"/>
<attribute name="PROD_ID" value=" "/>
<attribute name="VALUE"/>
</element>
<element name="R2" library="SparkFun-Resistors" package="0603" value="66R">
<attribute name="NAME"/>
<attribute name="PROD_ID" value=" "/>
<attribute name="VALUE"/>
</element>
<element name="C2" library="SparkFun-Capacitors" package="0603" value="0.1uF">
<attribute name="NAME"/>
<attribute name="PROD_ID" value="CAP-00810"/>
<attribute name="VALUE"/>
</element>
<element name="D3" library="SparkFun-LED" package="LED-0603" value="GREEN">
<attribute name="PROD_ID" value="DIO-00821"/>
<attribute name="VALUE"/>
</element>
<element name="R3" library="SparkFun-Resistors" package="0603" value="390R">
<attribute name="NAME"/>
<attribute name="PROD_ID" value=" "/>
<attribute name="VALUE"/>
</element>
<element name="C3" library="SparkFun" package="0805" value="4.7uf">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="IC2" library="linear" package="SOT23" value="MCP1703CB">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="RN1" library="resistor-net" package="CTS742C083" value="CTS742C083">
<attribute name="MF" value=""/>
<attribute name="MPN" value=""/>
<attribute name="OC_FARNELL" value="unknown"/>
<attribute name="OC_NEWARK" value="unknown"/>
<attribute name="VALUE"/>
</element>
</elements>
<signals>
<signal name="USB_M">
<contactref element="D1" pad="1"/>
<contactref element="X1" pad="USB_M"/>
<contactref element="R4" pad="1"/>
<contactref element="R1" pad="2"/>
</signal>
<signal name="USB_P">
<contactref element="X1" pad="USB_P"/>
<contactref element="D2" pad="1"/>
<contactref element="R2" pad="2"/>
</signal>
<signal name="GND">
<contactref element="IC1" pad="4"/>
<contactref element="D1" pad="2"/>
<contactref element="D2" pad="2"/>
<contactref element="X1" pad="GND"/>
<contactref element="C1" pad="2"/>
<contactref element="J1" pad="1"/>
<contactref element="J2" pad="1"/>
<contactref element="C2" pad="2"/>
<contactref element="D3" pad="C"/>
<contactref element="C3" pad="2"/>
<contactref element="IC2" pad="1"/>
</signal>
<signal name="5V">
<contactref element="IC1" pad="8"/>
<contactref element="C1" pad="1"/>
<contactref element="J1" pad="2"/>
<contactref element="R4" pad="2"/>
<contactref element="X1" pad="5V"/>
<contactref element="C2" pad="1"/>
<contactref element="IC2" pad="3"/>
<contactref element="RN1" pad="7"/>
<contactref element="RN1" pad="8"/>
</signal>
<signal name="N$1">
<contactref element="IC1" pad="2"/>
<contactref element="R1" pad="1"/>
</signal>
<signal name="SDA">
<contactref element="J1" pad="3"/>
<contactref element="IC1" pad="5"/>
<contactref element="Q1" pad="3"/>
<contactref element="RN1" pad="2"/>
</signal>
<signal name="N$6">
<contactref element="IC1" pad="3"/>
<contactref element="R2" pad="1"/>
</signal>
<signal name="SCL">
<contactref element="J1" pad="4"/>
<contactref element="IC1" pad="7"/>
<contactref element="Q2" pad="3"/>
<contactref element="RN1" pad="1"/>
</signal>
<signal name="+3V3">
<contactref element="J2" pad="2"/>
<contactref element="Q1" pad="1"/>
<contactref element="Q2" pad="1"/>
<contactref element="C3" pad="1"/>
<contactref element="IC2" pad="2"/>
<contactref element="RN1" pad="6"/>
<contactref element="RN1" pad="5"/>
</signal>
<signal name="SDA33">
<contactref element="J2" pad="3"/>
<contactref element="Q1" pad="2"/>
<contactref element="RN1" pad="4"/>
</signal>
<signal name="SCL33">
<contactref element="J2" pad="4"/>
<contactref element="Q2" pad="2"/>
<contactref element="RN1" pad="3"/>
</signal>
<signal name="N$2">
<contactref element="R3" pad="1"/>
<contactref element="D3" pad="A"/>
</signal>
<signal name="RST">
<contactref element="IC1" pad="1"/>
</signal>
<signal name="MISO">
<contactref element="IC1" pad="6"/>
<contactref element="R3" pad="2"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
