<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="8.6.3">
<drawing>
<board>
<plain>
<wire x1="3.81" y1="10.795" x2="52.07" y2="10.795" width="0.1524" layer="20"/>
<wire x1="52.07" y1="10.795" x2="54.61" y2="13.335" width="0.1524" layer="20" curve="90"/>
<wire x1="54.61" y1="13.335" x2="54.61" y2="41.275" width="0.1524" layer="20"/>
<wire x1="54.61" y1="41.275" x2="52.07" y2="43.815" width="0.1524" layer="20" curve="90"/>
<wire x1="52.07" y1="43.815" x2="3.81" y2="43.815" width="0.1524" layer="20"/>
<wire x1="3.81" y1="43.815" x2="1.27" y2="41.275" width="0.1524" layer="20" curve="90"/>
<wire x1="1.27" y1="41.275" x2="1.27" y2="13.335" width="0.1524" layer="20"/>
<wire x1="1.27" y1="13.335" x2="3.81" y2="10.795" width="0.1524" layer="20" curve="90"/>
<text>IAR</text>
<text>IAR</text>
</plain>
<libraries>
<library name="caps-film">
<packages>
<package name="0.2&quot;.SML">
<description>0.2" (5.08mm) spacing
&lt;p&gt;
&lt;b&gt; 
10pf - 180n&lt;/b&gt;</description>
</package>
<package name="0.2&quot;.MED">
<description>0.2" (5.08mm) spacing
&lt;p&gt;
&lt;b&gt;220n-680n caps&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="caps-elec">
<packages>
<package name="0502">
<description>0.1" (2.54mm) spacing</description>
</package>
<package name="0632">
<description>0.1" (2.54mm) spacing</description>
</package>
</packages>
</library>
<library name="resistors">
<packages>
<package name="0.3&quot;.B">
<description>0.3"  (7.62mm) lead spacing, 1/4W (flat)</description>
</package>
</packages>
</library>
<library name="diodes">
<packages>
<package name="DO41-3">
<description>&lt;b&gt;DO-41 0.3" pad spacing&lt;/b&gt;</description>
</package>
<package name="3MM_IO">
<description>&lt;B&gt;LED&lt;/B&gt;&lt;p&gt;
3 mm, round</description>
</package>
</packages>
</library>
<library name="jacks">
<packages>
<package name="DC_TS">
</package>
</packages>
</library>
<library name="potentiometers">
<packages>
<package name="16MM_C.MOUNT">
<description>&lt;b&gt;16mm / Right-Angle /  PC Mount / Short Pin&lt;/b&gt;
&lt;p&gt;
For aligning the center of the pot shaft to a specific drill location
&lt;p&gt;
&lt;a href="http://smallbear-electronics.mybigcommerce.com/alpha-single-gang-16mm-right-angle-pc-mount/"&gt;http://smallbear-electronics.mybigcommerce.com/alpha-single-gang-16mm-right-angle-pc-mount/&lt;/a&gt;</description>
</package>
</packages>
</library>
<library name="supply pins">
<packages>
<package name="PAD3">
<description>&lt;b&gt;Square Pad (w/label) - 80mil Diameter, 47mil Drill&lt;b&gt;</description>
</package>
<package name="PAD1">
<description>&lt;b&gt;Round Pad (w/label) - 80mil Diameter, 47mil Drill&lt;b&gt;</description>
</package>
</packages>
</library>
<library name="integrated circuits">
<packages>
<package name="DIP08">
<description>&lt;b&gt;Dual In Line Package&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="gm-caps-film-box">
<description>&lt;b&gt;Capacitors, Film, Box&lt;/b&gt;
&lt;ul&gt;
&lt;li&gt;1000pF - 2.2uF  (uF = µF = mF)
&lt;li&gt;popular nonpolarized capacitors because they are small
&lt;li&gt;these have short leads so that pad spacing equals lead spacing
&lt;li&gt;e.g., WIMA capacitors
&lt;/ul&gt;</description>
<packages>
<package name="072X025">
<description>&lt;b&gt;7.2mm x 2.5mm&lt;/b&gt;
&lt;p&gt;WIMA MKS2, MKP2</description>
</package>
</packages>
</library>
<library name="transistors-FET">
<packages>
<package name="TO92">
</package>
</packages>
</library>
<library name="enclosures">
<packages>
<package name="1590B">
</package>
<package name="DC_TOP">
</package>
<package name="3PDT">
</package>
<package name="LUMBURG_SIDE">
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="C1" library="caps-film" package="0.2&quot;.SML" value="30pf"/>
<element name="C2" library="caps-film" package="0.2&quot;.SML" value="100pf"/>
<element name="C3" library="caps-elec" package="0502" value="4.7uf"/>
<element name="C4" library="caps-elec" package="0502" value="2.2uf"/>
<element name="C5" library="caps-elec" package="0502" value="4.7uf"/>
<element name="C6" library="caps-film" package="0.2&quot;.MED" value="3.3n"/>
<element name="C7" library="caps-elec" package="0632" value="47uf"/>
<element name="CLR" library="resistors" package="0.3&quot;.B" value="4.7k"/>
<element name="D1" library="diodes" package="DO41-3" value="1N914"/>
<element name="D2" library="diodes" package="DO41-3" value="1N914"/>
<element name="D3" library="diodes" package="DO41-3" value="1N4002"/>
<element name="DC9V" library="jacks" package="DC_TS" value="DC_TS"/>
<element name="GAIN" library="potentiometers" package="16MM_C.MOUNT" value="A100k"/>
<element name="G" library="supply pins" package="PAD3" value="OUT"/>
<element name="IC-LM308" library="integrated circuits" package="DIP08" value="LM308_TH"/>
<element name="IN" library="supply pins" package="PAD1" value="INPUT"/>
<element name="SW" library="supply pins" package="PAD1" value="LED"/>
<element name="LEVEL" library="potentiometers" package="16MM_C.MOUNT" value="A100k"/>
<element name="OUT" library="supply pins" package="PAD1" value="OUT"/>
<element name="R1" library="resistors" package="0.3&quot;.B" value="47R"/>
<element name="R2" library="resistors" package="0.3&quot;.B" value="560R"/>
<element name="R3" library="resistors" package="0.3&quot;.B" value="1k"/>
<element name="R4" library="resistors" package="0.3&quot;.B" value="1.5k"/>
<element name="CUT" library="potentiometers" package="16MM_C.MOUNT" value="A100k">
<attribute name="NAME"/>
<attribute name="NAME"/>
</element>
<element name="R5" library="resistors" package="0.3&quot;.B" value="1M"/>
<element name="C8" library="gm-caps-film-box" package="072X025" value="22n"/>
<element name="R6" library="resistors" package="0.3&quot;.B" value="1M"/>
<element name="R7" library="resistors" package="0.3&quot;.B" value="1k"/>
<element name="C9" library="gm-caps-film-box" package="072X025" value="1n"/>
<element name="C10" library="gm-caps-film-box" package="072X025" value="22n"/>
<element name="R8" library="resistors" package="0.3&quot;.B" value="1M"/>
<element name="Q1" library="transistors-FET" package="TO92" value="2N5457"/>
<element name="R9" library="resistors" package="0.3&quot;.B" value="10k"/>
<element name="R10" library="resistors" package="0.3&quot;.B" value="47R"/>
<element name="LED" library="diodes" package="3MM_IO" value="LED.1"/>
<element name="C11" library="gm-caps-film-box" package="072X025" value="100n"/>
<element name="C12" library="caps-elec" package="0632" value="10uf"/>
<element name="R11" library="resistors" package="0.3&quot;.B" value="100k"/>
<element name="R12" library="resistors" package="0.3&quot;.B" value="100k"/>
<element name="C13" library="caps-elec" package="0502" value="1uf"/>
<element name="U$1" library="enclosures" package="1590B" value=""/>
<element name="U$2" library="enclosures" package="DC_TOP" value=""/>
<element name="U$3" library="enclosures" package="DC_TOP" value=""/>
<element name="U$4" library="enclosures" package="3PDT" value=""/>
<element name="U$5" library="enclosures" package="LUMBURG_SIDE" value=""/>
<element name="U$6" library="enclosures" package="LUMBURG_SIDE" value=""/>
</elements>
<signals>
<signal name="IN">
<contactref element="IN" pad="1"/>
<contactref element="C8" pad="1"/>
<contactref element="R5" pad="2"/>
</signal>
<signal name="N$2">
<contactref element="C1" pad="2"/>
<contactref element="IC-LM308" pad="1"/>
</signal>
<signal name="N$3">
<contactref element="C1" pad="1"/>
<contactref element="IC-LM308" pad="8"/>
</signal>
<signal name="N$4">
<contactref element="C2" pad="1"/>
<contactref element="IC-LM308" pad="6"/>
<contactref element="GAIN" pad="1"/>
<contactref element="R3" pad="1"/>
</signal>
<signal name="N$5">
<contactref element="R1" pad="1"/>
<contactref element="C4" pad="+"/>
</signal>
<signal name="N$7">
<contactref element="R2" pad="1"/>
<contactref element="C3" pad="+"/>
</signal>
<signal name="N$12">
<contactref element="D2" pad="A"/>
<contactref element="D1" pad="C"/>
<contactref element="C5" pad="-"/>
<contactref element="CUT" pad="1"/>
</signal>
<signal name="N$14">
<contactref element="R4" pad="2"/>
<contactref element="C6" pad="1"/>
<contactref element="C10" pad="1"/>
</signal>
<signal name="OUT">
<contactref element="LEVEL" pad="2"/>
<contactref element="OUT" pad="1"/>
</signal>
<signal name="+9V">
<contactref element="CLR" pad="2"/>
<contactref element="D3" pad="C"/>
<contactref element="C7" pad="+"/>
<contactref element="IC-LM308" pad="7"/>
<contactref element="C11" pad="2"/>
<contactref element="R11" pad="1"/>
<contactref element="Q1" pad="1"/>
<contactref element="R10" pad="2"/>
</signal>
<signal name="GND">
<contactref element="LEVEL" pad="1"/>
<contactref element="G" pad="1"/>
<contactref element="C7" pad="-"/>
<contactref element="D3" pad="A"/>
<contactref element="DC9V" pad="GND"/>
<contactref element="D2" pad="C"/>
<contactref element="D1" pad="A"/>
<contactref element="C6" pad="2"/>
<contactref element="C4" pad="-"/>
<contactref element="IC-LM308" pad="4"/>
<contactref element="R5" pad="1"/>
<contactref element="C9" pad="2"/>
<contactref element="C3" pad="-"/>
<contactref element="R8" pad="1"/>
<contactref element="R9" pad="1"/>
<contactref element="C11" pad="1"/>
<contactref element="C12" pad="-"/>
<contactref element="R12" pad="1"/>
</signal>
<signal name="N$1">
<contactref element="C8" pad="2"/>
<contactref element="R7" pad="1"/>
<contactref element="R6" pad="1"/>
</signal>
<signal name="N$8">
<contactref element="R7" pad="2"/>
<contactref element="IC-LM308" pad="3"/>
<contactref element="C9" pad="1"/>
</signal>
<signal name="N$9">
<contactref element="R3" pad="2"/>
<contactref element="C5" pad="+"/>
</signal>
<signal name="N$10">
<contactref element="CUT" pad="2"/>
<contactref element="CUT" pad="3"/>
<contactref element="R4" pad="1"/>
</signal>
<signal name="N$11">
<contactref element="C10" pad="2"/>
<contactref element="R8" pad="2"/>
<contactref element="Q1" pad="3"/>
</signal>
<signal name="N$13">
<contactref element="R9" pad="2"/>
<contactref element="Q1" pad="2"/>
<contactref element="C13" pad="+"/>
</signal>
<signal name="N$15">
<contactref element="LED" pad="A"/>
<contactref element="CLR" pad="1"/>
</signal>
<signal name="SW">
<contactref element="SW" pad="1"/>
<contactref element="LED" pad="K"/>
</signal>
<signal name="VB">
<contactref element="C12" pad="+"/>
<contactref element="R11" pad="2"/>
<contactref element="R12" pad="2"/>
<contactref element="R6" pad="2"/>
</signal>
<signal name="N$18">
<contactref element="R10" pad="1"/>
<contactref element="DC9V" pad="PWR"/>
</signal>
<signal name="N$16">
<contactref element="GAIN" pad="2"/>
<contactref element="C2" pad="2"/>
<contactref element="IC-LM308" pad="2"/>
<contactref element="GAIN" pad="3"/>
<contactref element="R2" pad="2"/>
<contactref element="R1" pad="2"/>
</signal>
<signal name="N$6">
<contactref element="C13" pad="-"/>
<contactref element="LEVEL" pad="3"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
