<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="9.7.0">
<drawing>
<board>
<plain>
<wire x1="2.54" y1="-5.08" x2="60.94" y2="-5.08" width="0" layer="20"/>
<wire x1="60.94" y1="-5.08" x2="60.94" y2="51.74" width="0" layer="20"/>
<wire x1="60.94" y1="51.74" x2="2.54" y2="51.74" width="0" layer="20"/>
<wire x1="2.54" y1="51.74" x2="2.54" y2="-5.08" width="0" layer="20"/>
<text>+12Ṿ</text>
<text>+12Ṿ</text>
<text>►▲▌░▓■▼╪╧╦₩</text>
<text>L-R
TLL, -12V, +12V, GND</text>
<text>L-R
TLL, ITTL, SIGIN, VVAIN</text>
<text>The feedback 
capacitor on the OP-
AMP is correct, Jared!</text>
</plain>
<libraries>
<library name="IC_Linear">
<description>&lt;B&gt;Amplifiers, OpAmp, Comparators, Video-processing</description>
<packages>
<package name="DIP826W53P254L959H508Q8B">
<description>8-DIP, 2.54 mm (0.10 in) pitch, 8.26 mm (0.33 in) span, 9.59 X 6.35 X 5.08 mm body
&lt;p&gt;8-pin DIP package with 2.54 mm (0.10 in) pitch, 8.26 mm (0.33 in) span with body size 9.59 X 6.35 X 5.08 mm&lt;/p&gt;</description>
</package>
</packages>
</library>
<library name="Connector">
<description>&lt;b&gt;Pin Headers,Terminal blocks, D-Sub, Backplane, FFC/FPC, Socket</description>
<packages>
<package name="TERMBLK_508-4N">
</package>
<package name="TERMBLK_254-2N">
</package>
</packages>
</library>
<library name="Resistor">
<description>&lt;B&gt;Resistors, Potentiometers, TrimPot</description>
<packages>
<package name="RESAD724W46L381D178B">
<description>Axial Resistor, 7.24 mm pitch, 3.81 mm body length, 1.78 mm body diameter
&lt;p&gt;Axial Resistor package with 7.24 mm pitch (lead spacing), 0.46 mm lead diameter, 3.81 mm body length and 1.78 mm body diameter&lt;/p&gt;</description>
</package>
</packages>
</library>
<library name="transistor">
<description>&lt;b&gt;Transistors&lt;/b&gt;&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="TO18">
<description>&lt;b&gt;TO 18&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="capacitor-wima">
<description>&lt;b&gt;WIMA Capacitors&lt;/b&gt;&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="C5B2.5">
<description>&lt;B&gt;MKS2&lt;/B&gt;, 7.5 x 2.5 mm, grid 5.08 mm</description>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="LM358N" library="IC_Linear" package="DIP826W53P254L959H508Q8B" value="LM358_DIP">
<attribute name="CATEGORY" value="Amplifier"/>
<attribute name="DESCRIPTION" value="Dual Operational Amplifier "/>
<attribute name="MANUFACTURER" value="Generic"/>
<attribute name="MPN" value="Generic"/>
<attribute name="NAME"/>
<attribute name="OPERATING_TEMP" value=""/>
<attribute name="PART_STATUS" value=""/>
<attribute name="ROHS_COMPLIANT" value=""/>
<attribute name="SERIES" value="LM358"/>
<attribute name="SUB-CATEGORY" value="OpAmp"/>
<attribute name="TYPE" value="Dual"/>
</element>
<element name="J1" library="Connector" package="TERMBLK_508-4N" value="2828XX-4282837-4">
<attribute name="CATEGORY" value="Fixed Terminal Blocks "/>
<attribute name="DESCRIPTION" value="Fixed Terminal Blocks 5.08MM PCB MOUNT 4P  "/>
<attribute name="MANUFACTURER" value="TE Connectivity AMP Connectors "/>
<attribute name="MPN" value="282837-4"/>
<attribute name="NAME"/>
<attribute name="OPERATING_TEMPERATURE" value="-40°C ~ 105°C"/>
<attribute name="PART_STATUS" value="Active"/>
<attribute name="PITCH" value="0.200&quot; (5.08mm) "/>
<attribute name="ROHS_COMPLIANCE" value="RoHS Compliant"/>
<attribute name="SERIES" value="Buchanan"/>
<attribute name="SUBCATEGORY" value="Terminal Blocks "/>
<attribute name="TYPE" value="Through Hole; Screw - Rising Cage Clamp; Side wire entry, Horizontal with Board "/>
</element>
<element name="J2" library="Connector" package="TERMBLK_254-2N" value="2828XX-2282834-2">
<attribute name="CATEGORY" value="Fixed Terminal Blocks"/>
<attribute name="DESCRIPTION" value="Fixed Terminal Blocks 2P SIDE ENTRY 2.54mm"/>
<attribute name="MANUFACTURER" value="TE Connectivity AMP Connectors"/>
<attribute name="MPN" value="282834-2 "/>
<attribute name="NAME"/>
<attribute name="OPERATING_TEMPERATURE" value="-40°C ~ 105°C "/>
<attribute name="PART_STATUS" value="Active "/>
<attribute name="PITCH" value="0.100&quot; (2.54mm) "/>
<attribute name="ROHS_COMPLIANCE" value="RoHS Compliant "/>
<attribute name="SERIES" value="Buchanan"/>
<attribute name="SUBCATEGORY" value="Terminal Blocks "/>
<attribute name="TYPE" value="Through Hole; Screw - Rising Cage Clamp; Side wire entry, Horizontal with Board "/>
<attribute name="VALUE"/>
</element>
<element name="J3" library="Connector" package="TERMBLK_508-4N" value="2828XX-4282837-4">
<attribute name="CATEGORY" value="Fixed Terminal Blocks "/>
<attribute name="DESCRIPTION" value="Fixed Terminal Blocks 5.08MM PCB MOUNT 4P  "/>
<attribute name="MANUFACTURER" value="TE Connectivity AMP Connectors "/>
<attribute name="MPN" value="282837-4"/>
<attribute name="NAME"/>
<attribute name="OPERATING_TEMPERATURE" value="-40°C ~ 105°C"/>
<attribute name="PART_STATUS" value="Active"/>
<attribute name="PITCH" value="0.200&quot; (5.08mm) "/>
<attribute name="ROHS_COMPLIANCE" value="RoHS Compliant"/>
<attribute name="SERIES" value="Buchanan"/>
<attribute name="SUBCATEGORY" value="Terminal Blocks "/>
<attribute name="TYPE" value="Through Hole; Screw - Rising Cage Clamp; Side wire entry, Horizontal with Board "/>
<attribute name="VALUE"/>
</element>
<element name="LF398N" library="IC_Linear" package="DIP826W53P254L959H508Q8B" value="LM386_DIP">
<attribute name="CATEGORY" value="Amplifier"/>
<attribute name="DESCRIPTION" value="Audio Power Amplifier "/>
<attribute name="MANUFACTURER" value="Generic"/>
<attribute name="MPN" value="Generic"/>
<attribute name="NAME"/>
<attribute name="OPERATING_TEMP" value=""/>
<attribute name="PART_STATUS" value=""/>
<attribute name="ROHS_COMPLIANT" value=""/>
<attribute name="SERIES" value="LM386"/>
<attribute name="SUB-CATEGORY" value="Power"/>
<attribute name="TYPE" value="Audio"/>
</element>
<element name="R1" library="Resistor" package="RESAD724W46L381D178B" value="">
<attribute name="CATEGORY" value="Resistor"/>
<attribute name="MANUFACTURER" value=""/>
<attribute name="MPN" value=""/>
<attribute name="NAME"/>
<attribute name="OPERATING_TEMP" value=""/>
<attribute name="PART_STATUS" value=""/>
<attribute name="RATING" value=""/>
<attribute name="ROHS_COMPLIANT" value=""/>
<attribute name="SERIES" value=""/>
<attribute name="SUB-CATEGORY" value="Fixed"/>
<attribute name="THERMALLOSS" value=""/>
<attribute name="TOLERANCE" value=""/>
<attribute name="TYPE" value=""/>
<attribute name="VALUE"/>
</element>
<element name="R2" library="Resistor" package="RESAD724W46L381D178B" value="">
<attribute name="CATEGORY" value="Resistor"/>
<attribute name="MANUFACTURER" value=""/>
<attribute name="MPN" value=""/>
<attribute name="NAME"/>
<attribute name="OPERATING_TEMP" value=""/>
<attribute name="PART_STATUS" value=""/>
<attribute name="RATING" value=""/>
<attribute name="ROHS_COMPLIANT" value=""/>
<attribute name="SERIES" value=""/>
<attribute name="SUB-CATEGORY" value="Fixed"/>
<attribute name="THERMALLOSS" value=""/>
<attribute name="TOLERANCE" value=""/>
<attribute name="TYPE" value=""/>
<attribute name="VALUE"/>
</element>
<element name="R3" library="Resistor" package="RESAD724W46L381D178B" value="">
<attribute name="CATEGORY" value="Resistor"/>
<attribute name="MANUFACTURER" value=""/>
<attribute name="MPN" value=""/>
<attribute name="NAME"/>
<attribute name="OPERATING_TEMP" value=""/>
<attribute name="PART_STATUS" value=""/>
<attribute name="RATING" value=""/>
<attribute name="ROHS_COMPLIANT" value=""/>
<attribute name="SERIES" value=""/>
<attribute name="SUB-CATEGORY" value="Fixed"/>
<attribute name="THERMALLOSS" value=""/>
<attribute name="TOLERANCE" value=""/>
<attribute name="TYPE" value=""/>
<attribute name="VALUE"/>
</element>
<element name="R5" library="Resistor" package="RESAD724W46L381D178B" value="">
<attribute name="CATEGORY" value="Resistor"/>
<attribute name="MANUFACTURER" value=""/>
<attribute name="MPN" value=""/>
<attribute name="NAME"/>
<attribute name="OPERATING_TEMP" value=""/>
<attribute name="PART_STATUS" value=""/>
<attribute name="RATING" value=""/>
<attribute name="ROHS_COMPLIANT" value=""/>
<attribute name="SERIES" value=""/>
<attribute name="SUB-CATEGORY" value="Fixed"/>
<attribute name="THERMALLOSS" value=""/>
<attribute name="TOLERANCE" value=""/>
<attribute name="TYPE" value=""/>
<attribute name="VALUE"/>
</element>
<element name="R6" library="Resistor" package="RESAD724W46L381D178B" value="">
<attribute name="CATEGORY" value="Resistor"/>
<attribute name="MANUFACTURER" value=""/>
<attribute name="MPN" value=""/>
<attribute name="NAME"/>
<attribute name="OPERATING_TEMP" value=""/>
<attribute name="PART_STATUS" value=""/>
<attribute name="RATING" value=""/>
<attribute name="ROHS_COMPLIANT" value=""/>
<attribute name="SERIES" value=""/>
<attribute name="SUB-CATEGORY" value="Fixed"/>
<attribute name="THERMALLOSS" value=""/>
<attribute name="TOLERANCE" value=""/>
<attribute name="TYPE" value=""/>
<attribute name="VALUE"/>
</element>
<element name="T1" library="transistor" package="TO18" value="2N706">
<attribute name="NAME"/>
<attribute name="POPULARITY" value="0"/>
<attribute name="VALUE"/>
</element>
<element name="C1" library="capacitor-wima" package="C5B2.5" value="100pF">
<attribute name="NAME"/>
<attribute name="POPULARITY" value="10"/>
<attribute name="VALUE"/>
</element>
<element name="C2" library="capacitor-wima" package="C5B2.5" value="100pF">
<attribute name="NAME"/>
<attribute name="POPULARITY" value="10"/>
<attribute name="VALUE"/>
</element>
<element name="C3" library="capacitor-wima" package="C5B2.5" value="1uF">
<attribute name="NAME"/>
<attribute name="POPULARITY" value="10"/>
<attribute name="VALUE"/>
</element>
<element name="R4" library="Resistor" package="RESAD724W46L381D178B" value="">
<attribute name="CATEGORY" value="Resistor"/>
<attribute name="MANUFACTURER" value=""/>
<attribute name="MPN" value=""/>
<attribute name="NAME"/>
<attribute name="OPERATING_TEMP" value=""/>
<attribute name="PART_STATUS" value=""/>
<attribute name="RATING" value=""/>
<attribute name="ROHS_COMPLIANT" value=""/>
<attribute name="SERIES" value=""/>
<attribute name="SUB-CATEGORY" value="Fixed"/>
<attribute name="THERMALLOSS" value=""/>
<attribute name="TOLERANCE" value=""/>
<attribute name="TYPE" value=""/>
<attribute name="VALUE"/>
</element>
<element name="R7" library="Resistor" package="RESAD724W46L381D178B" value="">
<attribute name="CATEGORY" value="Resistor"/>
<attribute name="MANUFACTURER" value=""/>
<attribute name="MPN" value=""/>
<attribute name="NAME"/>
<attribute name="OPERATING_TEMP" value=""/>
<attribute name="PART_STATUS" value=""/>
<attribute name="RATING" value=""/>
<attribute name="ROHS_COMPLIANT" value=""/>
<attribute name="SERIES" value=""/>
<attribute name="SUB-CATEGORY" value="Fixed"/>
<attribute name="THERMALLOSS" value=""/>
<attribute name="TOLERANCE" value=""/>
<attribute name="TYPE" value=""/>
<attribute name="VALUE"/>
</element>
<element name="C4" library="capacitor-wima" package="C5B2.5" value="100pF">
<attribute name="NAME"/>
<attribute name="POPULARITY" value="10"/>
<attribute name="VALUE"/>
</element>
</elements>
<signals>
<signal name="N$1">
<contactref element="T1" pad="2"/>
<contactref element="R1" pad="2"/>
</signal>
<signal name="TTL">
<contactref element="R1" pad="1"/>
<contactref element="R2" pad="2"/>
<contactref element="J1" pad="4"/>
<contactref element="J3" pad="1"/>
<contactref element="LF398N" pad="8"/>
</signal>
<signal name="GND">
<contactref element="R2" pad="1"/>
<contactref element="T1" pad="1"/>
<contactref element="J1" pad="1"/>
<contactref element="R6" pad="2"/>
<contactref element="J2" pad="2"/>
<contactref element="LM358N" pad="7"/>
<contactref element="LM358N" pad="6"/>
<contactref element="LM358N" pad="5"/>
<contactref element="C1" pad="1"/>
<contactref element="C2" pad="1"/>
<contactref element="C3" pad="1"/>
<contactref element="LF398N" pad="7"/>
<contactref element="R7" pad="2"/>
<contactref element="LF398N" pad="2"/>
</signal>
<signal name="INVTTL">
<contactref element="T1" pad="3"/>
<contactref element="R3" pad="1"/>
<contactref element="J3" pad="2"/>
</signal>
<signal name="+5V">
<contactref element="R3" pad="2"/>
<contactref element="R6" pad="1"/>
<contactref element="R5" pad="2"/>
<contactref element="J2" pad="1"/>
</signal>
<signal name="N$2">
<contactref element="LF398N" pad="6"/>
<contactref element="C3" pad="2"/>
</signal>
<signal name="OPAMP-IN">
<contactref element="LF398N" pad="5"/>
<contactref element="LM358N" pad="3"/>
</signal>
<signal name="+12V">
<contactref element="LF398N" pad="1"/>
<contactref element="LM358N" pad="8"/>
<contactref element="J1" pad="2"/>
<contactref element="R5" pad="1"/>
<contactref element="C1" pad="2"/>
</signal>
<signal name="-12V">
<contactref element="LF398N" pad="4"/>
<contactref element="LM358N" pad="4"/>
<contactref element="J1" pad="3"/>
<contactref element="C2" pad="2"/>
</signal>
<signal name="SAMPLE-IN">
<contactref element="LF398N" pad="3"/>
<contactref element="J3" pad="3"/>
</signal>
<signal name="VVA-IN">
<contactref element="J3" pad="4"/>
<contactref element="LM358N" pad="1"/>
<contactref element="R4" pad="2"/>
<contactref element="C4" pad="2"/>
</signal>
<signal name="N$4">
<contactref element="C4" pad="1"/>
<contactref element="R7" pad="1"/>
<contactref element="R4" pad="1"/>
<contactref element="LM358N" pad="2"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
