<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="6.5.0">
<drawing>
<board>
<plain>
<wire x1="0" y1="25.4" x2="0" y2="0" width="0" layer="46"/>
<wire x1="0" y1="0" x2="25.4" y2="0" width="0" layer="46"/>
<wire x1="25.4" y1="0" x2="25.4" y2="25.4" width="0" layer="46"/>
<wire x1="25.4" y1="25.4" x2="0" y2="25.4" width="0" layer="46"/>
<hole x="5" y="22.5" drill="3.2"/>
<hole x="20" y="22.5" drill="3.2"/>
<text>5V</text>
<text>GND</text>
<text>D</text>
<text>A</text>
<text></text>
<text>BOM:
R1 and R2 affect resolution:
R1=22K, R2=10K -&gt; 1 - 6mm
R1=82K, R2=47K -&gt; 3 - 4mm

R3 = 10K; R4 = 1M;  R5 = 560
R6 = 1K;   R7 = 560; R8 = 10K
C1 = 15uF TANT; C2 = 0.1uF
Q1 = BC848
IC1 = LM358D
IC2 = A1302UA OR SS495B
TRIMPOT = TC33X-2-103
0.1" 4 PIN HEADER
NOTE: R1 - R8, C1, C2 = 1206 PKG</text>
</plain>
<libraries>
<library name="led">
<packages>
<package name="CHIPLED_1206">
<description>&lt;b&gt;CHIPLED&lt;/b&gt;&lt;p&gt;
Source: http://www.osram.convergy.de/ ... LG_LY N971.pdf</description>
</package>
</packages>
</library>
<library name="linear">
<packages>
<package name="SO08">
<description>&lt;b&gt;Small Outline Package 8&lt;/b&gt;&lt;br&gt;
NS Package M08A</description>
</package>
</packages>
</library>
<library name="rcl">
<packages>
<package name="SMC_B">
<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>
<package name="C1206">
<description>&lt;b&gt;CAPACITOR&lt;/b&gt;</description>
</package>
<package name="R1206">
<description>&lt;b&gt;RESISTOR&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="transistor-npn">
<packages>
<package name="SOT23">
<description>&lt;b&gt;SOT-23&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="allegro">
<packages>
<package name="SIP3-UA">
<description>&lt;b&gt;Type: 3-pin SIP, conventional leadframe&lt;/b&gt;&lt;p&gt;
Source: http://www.allegromicro.com/en/Products/Packaging/pkghall1.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; 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="1X04">
</package>
</packages>
</library>
<library name="SparkFun-Electromechanical">
<description>&lt;h3&gt;SparkFun Electronics' preferred foot prints&lt;/h3&gt;
In this library you'll find anything that moves- switches, relays, buttons, potentiometers. Also, anything that goes on a board but isn't electrical in nature- screws, standoffs, 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 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; 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="TRIMPOT_TC33">
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="LED1" library="led" package="CHIPLED_1206" value="LED">
<attribute name="VALUE"/>
</element>
<element name="IC1" library="linear" package="SO08" value="LM358D">
<attribute name="NAME"/>
</element>
<element name="C1" library="rcl" package="SMC_B" value="15u">
<attribute name="NAME"/>
</element>
<element name="C2" library="rcl" package="C1206" value="0.1u">
<attribute name="NAME"/>
</element>
<element name="R1" library="rcl" package="R1206" value="V2">
<attribute name="NAME"/>
</element>
<element name="R7" library="rcl" package="R1206" value="560">
<attribute name="NAME"/>
</element>
<element name="R3" library="rcl" package="R1206" value="10K">
<attribute name="NAME"/>
</element>
<element name="R4" library="rcl" package="R1206" value="1M">
<attribute name="NAME"/>
</element>
<element name="R5" library="rcl" package="R1206" value="560">
<attribute name="NAME"/>
</element>
<element name="R2" library="rcl" package="R1206" value="V1">
<attribute name="NAME"/>
</element>
<element name="Q1" library="transistor-npn" package="SOT23" value="BC848">
<attribute name="NAME"/>
</element>
<element name="R6" library="rcl" package="R1206" value="1K">
<attribute name="NAME"/>
</element>
<element name="R8" library="rcl" package="R1206" value="10K">
<attribute name="NAME"/>
</element>
<element name="IC2" library="allegro" package="SIP3-UA" value="A1302UA">
<attribute name="NAME"/>
</element>
<element name="JP1" library="SparkFun-Connectors" package="1X04" value="">
<attribute name="VALUE"/>
</element>
<element name="TRIMPOT" library="SparkFun-Electromechanical" package="TRIMPOT_TC33" value="10K">
<attribute name="NAME"/>
</element>
</elements>
<signals>
<signal name="GND">
<contactref element="C1" pad="-"/>
<contactref element="C2" pad="2"/>
<contactref element="IC1" pad="4"/>
<contactref element="R1" pad="1"/>
<contactref element="R3" pad="1"/>
<contactref element="LED1" pad="C"/>
<contactref element="Q1" pad="2"/>
<contactref element="IC2" pad="2"/>
<contactref element="JP1" pad="2"/>
<contactref element="IC1" pad="2"/>
<contactref element="IC1" pad="3"/>
</signal>
<signal name="+5V">
<contactref element="IC1" pad="8"/>
<contactref element="C2" pad="1"/>
<contactref element="C1" pad="+"/>
<contactref element="R8" pad="2"/>
<contactref element="IC2" pad="1"/>
<contactref element="TRIMPOT" pad="2"/>
<contactref element="JP1" pad="1"/>
</signal>
<signal name="STOP">
<contactref element="Q1" pad="3"/>
<contactref element="R8" pad="1"/>
<contactref element="JP1" pad="3"/>
</signal>
<signal name="N$2">
<contactref element="LED1" pad="A"/>
<contactref element="R7" pad="1"/>
</signal>
<signal name="N$3">
<contactref element="R1" pad="2"/>
<contactref element="R2" pad="1"/>
<contactref element="IC1" pad="6"/>
</signal>
<signal name="SIGNAL">
<contactref element="R5" pad="2"/>
<contactref element="IC2" pad="3"/>
<contactref element="JP1" pad="4"/>
</signal>
<signal name="N$8">
<contactref element="R3" pad="2"/>
<contactref element="R5" pad="1"/>
<contactref element="IC1" pad="5"/>
<contactref element="R4" pad="1"/>
</signal>
<signal name="N$5">
<contactref element="R2" pad="2"/>
<contactref element="TRIMPOT" pad="1"/>
</signal>
<signal name="1">
<contactref element="R4" pad="2"/>
<contactref element="IC1" pad="7"/>
<contactref element="R7" pad="2"/>
<contactref element="R6" pad="2"/>
</signal>
<signal name="N$1">
<contactref element="R6" pad="1"/>
<contactref element="Q1" pad="1"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
