<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="6.6.0">
<drawing>
<board>
<plain>
<wire x1="-0.63" y1="-0.47" x2="55.23" y2="-0.47" width="0" layer="20"/>
<wire x1="55.23" y1="-0.47" x2="55.23" y2="41.11" width="0" layer="20"/>
<wire x1="55.23" y1="41.11" x2="-0.63" y2="41.11" width="0" layer="20"/>
<wire x1="-0.63" y1="41.11" x2="-0.63" y2="-0.47" width="0" layer="20"/>
</plain>
<libraries>
<library name="linear">
<packages>
<package name="DIL14">
<description>&lt;b&gt;Dual In Line Package&lt;/b&gt;</description>
</package>
<package name="DIL16">
<description>&lt;b&gt;Dual In Line Package&lt;/b&gt;</description>
</package>
<package name="DIL08">
<description>&lt;b&gt;Dual In Line Package&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="rcl">
<packages>
<package name="0207/10">
<description>&lt;b&gt;RESISTOR&lt;/b&gt;&lt;p&gt;
type 0207, grid 10 mm</description>
</package>
</packages>
</library>
<library name="wirepad">
<packages>
<package name="1,6/0,9">
<description>&lt;b&gt;THROUGH-HOLE PAD&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="pot">
<packages>
<package name="SP19L">
<description>&lt;b&gt;POTENTIOMETER&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="pinhead">
<packages>
<package name="1X02">
<description>&lt;b&gt;PIN HEADER&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="diode">
<packages>
<package name="DO35Z10">
<description>&lt;B&gt;DIODE&lt;/B&gt;&lt;p&gt;
diameter 2 mm, horizontal, grid 10.16mm</description>
</package>
<package name="DO35-10">
<description>&lt;B&gt;DIODE&lt;/B&gt;&lt;p&gt;
diameter 2 mm, horizontal, grid 10.16 mm</description>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="R2" library="rcl" package="0207/10" value="100K"/>
<element name="R3" library="rcl" package="0207/10" value="100K"/>
<element name="TTL_TX" library="wirepad" package="1,6/0,9" value=""/>
<element name="R1" library="rcl" package="0207/10" value="100K"/>
<element name="THR" library="pot" package="SP19L" value="50K"/>
<element name="JP1" library="pinhead" package="1X02" value=""/>
<element name="IC2" library="linear" package="DIL16" value="DG201CJN"/>
<element name="MUT" library="wirepad" package="1,6/0,9" value=""/>
<element name="R5" library="rcl" package="0207/10" value="27K"/>
<element name="R4" library="rcl" package="0207/10" value="75K"/>
<element name="JP2" library="pinhead" package="1X02" value=""/>
<element name="TTL_INVERT" library="wirepad" package="1,6/0,9" value=""/>
<element name="TTL_CTL" library="wirepad" package="1,6/0,9" value=""/>
<element name="TTL_RX" library="wirepad" package="1,6/0,9" value=""/>
<element name="R6" library="rcl" package="0207/10" value="75K"/>
<element name="D1" library="diode" package="DO35Z10" value="1N5229B"/>
<element name="D2" library="diode" package="DO35-10" value="1N4148"/>
<element name="R9" library="rcl" package="0207/10" value="3.3K"/>
<element name="R7" library="rcl" package="0207/10" value="75K"/>
<element name="IC3" library="linear" package="DIL14" value="LM139N"/>
<element name="R8" library="rcl" package="0207/10" value="3.3K"/>
<element name="IC4" library="linear" package="DIL08" value="LM6171"/>
</elements>
<signals>
<signal name="V+">
<contactref element="IC2" pad="13"/>
<contactref element="R6" pad="2"/>
<contactref element="IC3" pad="3"/>
<contactref element="R9" pad="2"/>
<contactref element="IC4" pad="7"/>
</signal>
<signal name="V-">
<contactref element="IC2" pad="4"/>
<contactref element="R7" pad="1"/>
<contactref element="IC3" pad="12"/>
<contactref element="IC4" pad="4"/>
</signal>
<signal name="GND">
<contactref element="IC2" pad="5"/>
<contactref element="R5" pad="1"/>
<contactref element="IC2" pad="14"/>
<contactref element="D2" pad="A"/>
<contactref element="D1" pad="A"/>
</signal>
<signal name="N$1">
<contactref element="TTL_TX" pad="1"/>
<contactref element="R2" pad="1"/>
<contactref element="R3" pad="1"/>
</signal>
<signal name="N$2">
<contactref element="R3" pad="2"/>
<contactref element="IC2" pad="15"/>
<contactref element="IC4" pad="3"/>
</signal>
<signal name="N$3">
<contactref element="R2" pad="2"/>
<contactref element="R1" pad="1"/>
<contactref element="IC4" pad="2"/>
</signal>
<signal name="N$4">
<contactref element="R1" pad="2"/>
<contactref element="IC2" pad="3"/>
<contactref element="IC4" pad="6"/>
</signal>
<signal name="N$5">
<contactref element="IC2" pad="2"/>
<contactref element="JP1" pad="1"/>
</signal>
<signal name="N$6">
<contactref element="JP1" pad="2"/>
<contactref element="MUT" pad="1"/>
<contactref element="R4" pad="2"/>
</signal>
<signal name="N$7">
<contactref element="R5" pad="2"/>
<contactref element="R4" pad="1"/>
<contactref element="IC3" pad="5"/>
</signal>
<signal name="N$8">
<contactref element="JP2" pad="1"/>
<contactref element="IC3" pad="4"/>
</signal>
<signal name="THR">
<contactref element="JP2" pad="2"/>
<contactref element="THR" pad="S"/>
</signal>
<signal name="N$10">
<contactref element="IC2" pad="16"/>
<contactref element="TTL_INVERT" pad="1"/>
</signal>
<signal name="N$11">
<contactref element="IC2" pad="1"/>
<contactref element="TTL_CTL" pad="1"/>
</signal>
<signal name="N$12">
<contactref element="D2" pad="C"/>
<contactref element="D1" pad="C"/>
<contactref element="TTL_RX" pad="1"/>
<contactref element="R8" pad="1"/>
</signal>
<signal name="N$13">
<contactref element="THR" pad="E"/>
<contactref element="R6" pad="1"/>
</signal>
<signal name="N$14">
<contactref element="THR" pad="A"/>
<contactref element="R7" pad="2"/>
</signal>
<signal name="N$9">
<contactref element="IC3" pad="2"/>
<contactref element="R8" pad="2"/>
<contactref element="R9" pad="1"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
