<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="8.0.2">
<drawing>
<board>
<plain>
<wire x1="21.59" y1="15.24" x2="97.77" y2="15.24" width="0" layer="20"/>
<wire x1="97.77" y1="15.24" x2="97.77" y2="80.95" width="0" layer="20"/>
<wire x1="97.77" y1="80.95" x2="21.59" y2="80.95" width="0" layer="20"/>
<wire x1="21.59" y1="80.95" x2="21.59" y2="15.24" width="0" layer="20"/>
<text>PYBOARD</text>
<text>X1</text>
<text>X2</text>
<text>X5</text>
<text>DAC Out-&gt;</text>
<text>ADC IN 1&lt;-</text>
<text>ADC IN 2&lt;-</text>
<text>INPUT 1</text>
<text>INPUT 2</text>
<text>DAC OUT</text>
<text>Dac out PWR</text>
<text>5V from USB
or 5V to pybrd 
(w/o USB connect!)
</text>
<text>+5V</text>
<text>GND</text>
<text>GND</text>
<text>+5 to +12V</text>
<text>-5 to -12V</text>
<text>Input Scaling Trimpots  25K</text>
<text>Adjust to scale input
by known factor
for best range 
readable by PyBoard</text>
<text>Output Scaling Resistor</text>
<text>Output Voltage = 
3.3V * ( R / 10K)
Must be within DAC
PWR supply range</text>
<text>Must be connected
to make output!</text>
<hole x="73.152" y="20.828" drill="3.7973"/>
<hole x="43.942" y="20.828" drill="3.7973"/>
<hole x="39.878" y="73.66" drill="3.7973"/>
<hole x="94.234" y="62.23" drill="3.7973"/>
<text>CH2
scale</text>
<text>CH1
scale</text>
<text>PyBrd
PWR
5V</text>
<text>DUKE
PHYSICS</text>
</plain>
<libraries>
<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="1X03">
<description>&lt;b&gt;PIN HEADER&lt;/b&gt;</description>
</package>
<package name="1X02">
<description>&lt;b&gt;PIN HEADER&lt;/b&gt;</description>
</package>
<package name="1X01">
<description>&lt;b&gt;PIN HEADER&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="my_miniproto">
<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="1X16">
<description>&lt;h3&gt;Plated Through Hole -16 Pin&lt;/h3&gt;
&lt;p&gt;Specifications:
&lt;ul&gt;&lt;li&gt;Pin count:16&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_16&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;</description>
</package>
<package name="1X01">
<description>&lt;h3&gt;Plated Through Hole&lt;/h3&gt;
&lt;p&gt;Specifications:
&lt;ul&gt;&lt;li&gt;Pin count:1&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_01&lt;/li&gt;
&lt;/ul&gt;&lt;/p&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="DIL08">
<description>&lt;b&gt;Dual In Line Package&lt;/b&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="BNC">
<description>&lt;h3&gt;BNC Jack - Mouser Part#5227161 &lt;/h3&gt;
&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://www.mouser.com/ds/2/418/NG_CS_1307191_BNC_Connectors_0307-561881.pdf”&gt;Datasheet referenced for footprint&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Example device(s):
&lt;ul&gt;&lt;li&gt;BNC&lt;/li&gt;
&lt;/ul&gt;&lt;/p&gt;</description>
</package>
</packages>
</library>
<library name="adafruit">
<packages>
<package name="0207/7">
<description>&lt;b&gt;RESISTOR&lt;/b&gt;&lt;p&gt;
type 0207, grid 7.5 mm</description>
</package>
</packages>
</library>
<library name="pot">
<description>&lt;b&gt;Potentiometers&lt;/b&gt;&lt;p&gt;
Beckman, Copal, Piher, Spectrol, Schukat&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="B64Y">
<description>&lt;b&gt;POTENTIOMETER&lt;/b&gt;&lt;p&gt;
Beckman Helitrim 64</description>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="EXTPWR" library="pinhead" package="1X03" value="">
<attribute name="VALUE"/>
</element>
<element name="EXTPWR2" library="pinhead" package="1X03" value="">
<attribute name="VALUE"/>
</element>
<element name="J1" library="my_miniproto" package="1X16" value=""/>
<element name="MCP6002" library="linear" package="DIL08" value="TL072P">
<attribute name="NAME"/>
</element>
<element name="PYBOARDPWR" library="pinhead" package="1X02" value="">
<attribute name="VALUE"/>
</element>
<element name="PYBOARDPWR2" library="pinhead" package="1X02" value="">
<attribute name="VALUE"/>
</element>
<element name="TL072" library="linear" package="DIL08" value="TL072P">
<attribute name="NAME"/>
</element>
<element name="IN1" library="SparkFun-Connectors" package="BNC" value="BNCPTH">
<attribute name="PROD_ID" value="LPA-12729"/>
<attribute name="SF_ID" value="PRT-10550"/>
</element>
<element name="IN2" library="SparkFun-Connectors" package="BNC" value="BNCPTH">
<attribute name="PROD_ID" value="LPA-12729"/>
<attribute name="SF_ID" value="PRT-10550"/>
</element>
<element name="R1" library="adafruit" package="0207/7" value="10K">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R2" library="adafruit" package="0207/7" value="10K">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R3" library="adafruit" package="0207/7" value="10K">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="J2" library="SparkFun-Connectors" package="BNC" value="BNCPTH">
<attribute name="PROD_ID" value="LPA-12729"/>
<attribute name="SF_ID" value="PRT-10550"/>
</element>
<element name="AMPRA" library="pinhead" package="1X01" value="">
<attribute name="VALUE"/>
</element>
<element name="AMPRB" library="pinhead" package="1X01" value="">
<attribute name="VALUE"/>
</element>
<element name="R4" library="pot" package="B64Y" value=""/>
<element name="R5" library="pot" package="B64Y" value=""/>
<element name="J4" library="my_miniproto" package="1X01" value=""/>
<element name="J5" library="my_miniproto" package="1X01" value=""/>
</elements>
<signals>
<signal name="+5V">
<contactref element="PYBOARDPWR" pad="1"/>
<contactref element="PYBOARDPWR2" pad="1"/>
<contactref element="J1" pad="1"/>
</signal>
<signal name="+9V">
<contactref element="EXTPWR2" pad="1"/>
<contactref element="EXTPWR" pad="1"/>
<contactref element="TL072" pad="8"/>
</signal>
<signal name="GND">
<contactref element="EXTPWR2" pad="2"/>
<contactref element="EXTPWR" pad="2"/>
<contactref element="PYBOARDPWR2" pad="2"/>
<contactref element="PYBOARDPWR" pad="2"/>
<contactref element="J1" pad="3"/>
<contactref element="MCP6002" pad="4"/>
<contactref element="IN1" pad="GND"/>
<contactref element="IN2" pad="GND"/>
<contactref element="J2" pad="GND"/>
<contactref element="TL072" pad="3"/>
<contactref element="TL072" pad="5"/>
<contactref element="R4" pad="A"/>
<contactref element="R5" pad="A"/>
</signal>
<signal name="-9V">
<contactref element="EXTPWR2" pad="3"/>
<contactref element="EXTPWR" pad="3"/>
<contactref element="TL072" pad="4"/>
</signal>
<signal name="3V3">
<contactref element="J1" pad="2"/>
<contactref element="MCP6002" pad="8"/>
</signal>
<signal name="X1">
<contactref element="J1" pad="16"/>
<contactref element="MCP6002" pad="6"/>
<contactref element="MCP6002" pad="7"/>
</signal>
<signal name="X2">
<contactref element="J1" pad="15"/>
<contactref element="MCP6002" pad="2"/>
<contactref element="MCP6002" pad="1"/>
</signal>
<signal name="X3">
<contactref element="J1" pad="14"/>
</signal>
<signal name="X4">
<contactref element="J1" pad="13"/>
</signal>
<signal name="X5">
<contactref element="J1" pad="12"/>
<contactref element="R1" pad="1"/>
</signal>
<signal name="X6">
<contactref element="J1" pad="11"/>
</signal>
<signal name="N$1">
<contactref element="TL072" pad="7"/>
<contactref element="J2" pad="S"/>
<contactref element="R3" pad="2"/>
</signal>
<signal name="N$2">
<contactref element="R3" pad="1"/>
<contactref element="TL072" pad="6"/>
<contactref element="R2" pad="2"/>
</signal>
<signal name="N$3">
<contactref element="TL072" pad="1"/>
<contactref element="R2" pad="1"/>
<contactref element="AMPRB" pad="1"/>
</signal>
<signal name="N$4">
<contactref element="R1" pad="2"/>
<contactref element="TL072" pad="2"/>
<contactref element="AMPRA" pad="1"/>
</signal>
<signal name="N$5">
<contactref element="MCP6002" pad="5"/>
<contactref element="R4" pad="E"/>
</signal>
<signal name="N$7">
<contactref element="IN1" pad="S"/>
<contactref element="R4" pad="S"/>
</signal>
<signal name="N$6">
<contactref element="R5" pad="S"/>
<contactref element="IN2" pad="S"/>
</signal>
<signal name="N$8">
<contactref element="MCP6002" pad="3"/>
<contactref element="R5" pad="E"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
