<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="6.6.0">
<drawing>
<board>
<plain>
<wire x1="0" y1="0" x2="58.181875" y2="0" width="0.127" layer="20"/>
<wire x1="58.181875" y1="0" x2="58.181875" y2="52.3875" width="0.127" layer="20"/>
<wire x1="58.181875" y1="52.3875" x2="0" y2="52.3875" width="0.127" layer="20"/>
<wire x1="0" y1="52.3875" x2="0" y2="0" width="0.127" layer="20"/>
<text>GND</text>
<text>+5V</text>
<text>GND</text>
<text>+5V</text>
<text>440 V1</text>
<text>-9V</text>
<text>+9V</text>
<text>-9V</text>
<text>+9V</text>
</plain>
<libraries>
<library name="rcl">
<packages>
<package name="C0805">
<description>&lt;b&gt;CAPACITOR&lt;/b&gt;&lt;p&gt;
chip</description>
</package>
<package name="R0805">
<description>&lt;b&gt;RESISTOR&lt;/b&gt;&lt;p&gt;</description>
</package>
</packages>
</library>
<library name="v-reg-micrel">
<packages>
<package name="SOT23-5">
<description>&lt;b&gt;&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="74xx-us">
<packages>
<package name="SO14">
<description>&lt;b&gt;Small Outline package&lt;/b&gt; 150 mil</description>
</package>
</packages>
</library>
<library name="OPTO">
<packages>
<package name="LED">
</package>
</packages>
</library>
<library name="440">
<description>Generated from &lt;b&gt;440.sch&lt;/b&gt;&lt;p&gt;
by exp-lbrs.ulp</description>
<packages>
<package name="VIKS_XTAL11MHZ">
</package>
<package name="9VBATTHOLDER">
</package>
<package name="MINISPEAKER_440">
</package>
<package name="TANTCAP47">
</package>
<package name="DPAK_STM">
</package>
<package name="M08A-M">
</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="SO08">
<description>&lt;b&gt;Small Outline Package 8&lt;/b&gt;&lt;br&gt;
NS Package M08A</description>
</package>
</packages>
</library>
<library name="DirectDrive">
<packages>
<package name="ROCKERSWITCHTYCO">
</package>
</packages>
</library>
<library name="BrakeChopper">
<description>Generated from &lt;b&gt;BrakeChopper.sch&lt;/b&gt;&lt;p&gt;
by exp-lbrs.ulp</description>
<packages>
<package name="POT_TRIM_VERT">
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="VR2" library="v-reg-micrel" package="SOT23-5" value="3.3V">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="LED1" library="OPTO" package="LED" value="LED">
<attribute name="NAME"/>
</element>
<element name="C5" library="rcl" package="C0805" value=".1">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C4" library="rcl" package="C0805" value=".1">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C6" library="rcl" package="C0805" value=".1">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="IC1" library="74xx-us" package="SO14" value="7490"/>
<element name="X1" library="440" package="VIKS_XTAL11MHZ" value="11MHz"/>
<element name="IC2" library="74xx-us" package="SO14" value="7490"/>
<element name="IC3" library="74xx-us" package="SO14" value="7490"/>
<element name="IC4" library="74xx-us" package="SO14" value="7490"/>
<element name="IC5" library="74xx-us" package="SO14" value="7490"/>
<element name="IC6" library="linear" package="SO08" value="LM358D">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C14" library="rcl" package="C0805" value=".2">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C16" library="rcl" package="C0805" value=".2">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C8" library="rcl" package="C0805" value=".1">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C9" library="rcl" package="C0805" value=".1">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C10" library="rcl" package="C0805" value=".1">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C11" library="rcl" package="C0805" value=".1">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C12" library="rcl" package="C0805" value=".1">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C13" library="rcl" package="C0805" value=".1">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="S1" library="DirectDrive" package="ROCKERSWITCHTYCO" value="ROCKERSWITCHTYCO"/>
<element name="VOLUME" library="BrakeChopper" package="POT_TRIM_VERT" value="10K">
<attribute name="VALUE"/>
<attribute name="NAME"/>
</element>
<element name="C2" library="rcl" package="C0805" value=".1">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R1" library="rcl" package="R0805" value="2.2K">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R2" library="rcl" package="R0805" value="2.2K">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R3" library="rcl" package="R0805" value="2.2K">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R4" library="rcl" package="R0805" value="2.2K">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R5" library="rcl" package="R0805" value="2.2K">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C18" library="rcl" package="C0805" value="1">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R6" library="rcl" package="R0805" value="20K">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C20" library="rcl" package="C0805" value="1">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="B1" library="440" package="9VBATTHOLDER" value="9VOLTBATHOLDER"/>
<element name="S2" library="440" package="MINISPEAKER_440" value="MINI_SPEAKER"/>
<element name="C7" library="440" package="TANTCAP47" value="47uF"/>
<element name="C3" library="440" package="TANTCAP47" value="47uF"/>
<element name="C1" library="440" package="TANTCAP47" value="47uF"/>
<element name="VR1" library="440" package="DPAK_STM" value="5V"/>
<element name="C17" library="rcl" package="C0805" value=".1">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C15" library="rcl" package="C0805" value=".1"/>
<element name="U$8" library="440" package="M08A-M" value="LM4871MX">
<attribute name="COPYRIGHT" value="Copyright (C) 2025 Ultra Librarian. All rights reserved."/>
<attribute name="MFR_NAME" value="Texas Instruments"/>
<attribute name="MANUFACTURER_PART_NUMBER" value="LM4871MX"/>
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R7" library="rcl" package="R0805" value="20K">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="C19" library="rcl" package="C0805" value="1"/>
</elements>
<signals>
<signal name="GND">
<contactref element="C4" pad="2"/>
<contactref element="VR2" pad="2"/>
<contactref element="C5" pad="2"/>
<contactref element="IC1" pad="2"/>
<contactref element="IC1" pad="3"/>
<contactref element="IC1" pad="6"/>
<contactref element="IC1" pad="7"/>
<contactref element="IC2" pad="2"/>
<contactref element="IC2" pad="3"/>
<contactref element="IC2" pad="6"/>
<contactref element="IC2" pad="7"/>
<contactref element="IC3" pad="2"/>
<contactref element="IC3" pad="3"/>
<contactref element="IC3" pad="6"/>
<contactref element="IC3" pad="7"/>
<contactref element="X1" pad="2GND"/>
<contactref element="IC1" pad="10"/>
<contactref element="IC2" pad="10"/>
<contactref element="IC3" pad="10"/>
<contactref element="IC4" pad="10"/>
<contactref element="IC5" pad="10"/>
<contactref element="IC6" pad="4"/>
<contactref element="C8" pad="2"/>
<contactref element="C9" pad="2"/>
<contactref element="C10" pad="2"/>
<contactref element="C11" pad="2"/>
<contactref element="C12" pad="2"/>
<contactref element="C13" pad="2"/>
<contactref element="IC4" pad="2"/>
<contactref element="IC4" pad="3"/>
<contactref element="IC4" pad="6"/>
<contactref element="IC4" pad="7"/>
<contactref element="IC5" pad="2"/>
<contactref element="IC5" pad="3"/>
<contactref element="IC5" pad="6"/>
<contactref element="IC5" pad="7"/>
<contactref element="C2" pad="2"/>
<contactref element="C6" pad="2"/>
<contactref element="R5" pad="2"/>
<contactref element="B1" pad="N"/>
<contactref element="C7" pad="-"/>
<contactref element="C3" pad="-"/>
<contactref element="C1" pad="-"/>
<contactref element="VR1" pad="3"/>
<contactref element="C15" pad="2"/>
<contactref element="C17" pad="2"/>
<contactref element="VOLUME" pad="4"/>
<contactref element="VOLUME" pad="3"/>
<contactref element="U$8" pad="1"/>
<contactref element="C19" pad="2"/>
<contactref element="U$8" pad="7"/>
<contactref element="C20" pad="2"/>
</signal>
<signal name="+3V">
<contactref element="VR2" pad="5"/>
<contactref element="C6" pad="1"/>
<contactref element="X1" pad="4VCC"/>
<contactref element="C7" pad="+"/>
</signal>
<signal name="N$244">
<contactref element="LED1" pad="2"/>
<contactref element="R5" pad="1"/>
</signal>
<signal name="+5V">
<contactref element="C4" pad="1"/>
<contactref element="IC1" pad="5"/>
<contactref element="IC2" pad="5"/>
<contactref element="IC3" pad="5"/>
<contactref element="IC4" pad="5"/>
<contactref element="IC5" pad="5"/>
<contactref element="IC6" pad="8"/>
<contactref element="C8" pad="1"/>
<contactref element="C9" pad="1"/>
<contactref element="C13" pad="1"/>
<contactref element="C12" pad="1"/>
<contactref element="C11" pad="1"/>
<contactref element="C10" pad="1"/>
<contactref element="VR2" pad="1"/>
<contactref element="VR2" pad="3"/>
<contactref element="C5" pad="1"/>
<contactref element="LED1" pad="1"/>
<contactref element="C3" pad="+"/>
<contactref element="VR1" pad="2"/>
<contactref element="U$8" pad="6"/>
<contactref element="C20" pad="1"/>
</signal>
<signal name="11MHZ">
<contactref element="IC1" pad="1"/>
<contactref element="X1" pad="3OUT"/>
</signal>
<signal name="N$2">
<contactref element="IC1" pad="14"/>
<contactref element="IC1" pad="11"/>
</signal>
<signal name="1.1MHZ">
<contactref element="IC1" pad="12"/>
<contactref element="IC2" pad="1"/>
</signal>
<signal name="220KHZ">
<contactref element="IC2" pad="11"/>
<contactref element="IC3" pad="1"/>
</signal>
<signal name="44KHZ">
<contactref element="IC3" pad="11"/>
<contactref element="IC4" pad="1"/>
</signal>
<signal name="4.4KHZ">
<contactref element="IC5" pad="1"/>
<contactref element="IC4" pad="12"/>
</signal>
<signal name="N$9">
<contactref element="IC4" pad="11"/>
<contactref element="IC4" pad="14"/>
</signal>
<signal name="N$10">
<contactref element="IC5" pad="11"/>
<contactref element="IC5" pad="14"/>
</signal>
<signal name="440HZ">
<contactref element="R1" pad="1"/>
<contactref element="IC5" pad="12"/>
</signal>
<signal name="N$5">
<contactref element="C14" pad="2"/>
<contactref element="R1" pad="2"/>
<contactref element="R2" pad="1"/>
</signal>
<signal name="N$11">
<contactref element="IC6" pad="3"/>
<contactref element="R2" pad="2"/>
<contactref element="C15" pad="1"/>
</signal>
<signal name="N$12">
<contactref element="IC6" pad="2"/>
<contactref element="IC6" pad="1"/>
<contactref element="C14" pad="1"/>
<contactref element="R3" pad="1"/>
</signal>
<signal name="N$13">
<contactref element="C16" pad="2"/>
<contactref element="R3" pad="2"/>
<contactref element="R4" pad="1"/>
</signal>
<signal name="N$14">
<contactref element="IC6" pad="5"/>
<contactref element="R4" pad="2"/>
<contactref element="C17" pad="1"/>
</signal>
<signal name="N$15">
<contactref element="IC6" pad="7"/>
<contactref element="IC6" pad="6"/>
<contactref element="C16" pad="1"/>
<contactref element="VOLUME" pad="1"/>
<contactref element="VOLUME" pad="6"/>
</signal>
<signal name="9V">
<contactref element="S1" pad="2"/>
<contactref element="B1" pad="P"/>
</signal>
<signal name="N$4">
<contactref element="U$8" pad="4"/>
<contactref element="R6" pad="2"/>
<contactref element="R7" pad="1"/>
</signal>
<signal name="N$6">
<contactref element="R7" pad="2"/>
<contactref element="U$8" pad="5"/>
<contactref element="S2" pad="+"/>
</signal>
<signal name="N$3">
<contactref element="R6" pad="1"/>
<contactref element="C18" pad="1"/>
</signal>
<signal name="N$7">
<contactref element="VOLUME" pad="5"/>
<contactref element="VOLUME" pad="2"/>
<contactref element="C18" pad="2"/>
</signal>
<signal name="N$1">
<contactref element="U$8" pad="3"/>
<contactref element="U$8" pad="2"/>
<contactref element="C19" pad="1"/>
</signal>
<signal name="SWT_9V">
<contactref element="S1" pad="1"/>
<contactref element="C2" pad="1"/>
<contactref element="C1" pad="+"/>
<contactref element="VR1" pad="1"/>
</signal>
<signal name="N$8">
<contactref element="U$8" pad="8"/>
<contactref element="S2" pad="-"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
