<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="9.6.2">
<drawing>
<board>
<plain>
<text>PIEZO
PREAMP</text>
<text>pcb by
general
assembly</text>
<text>XLR</text>
<text>PIEZO</text>
<wire x1="0" y1="19.05" x2="0" y2="1.27" width="0.0762" layer="20"/>
<wire x1="0" y1="1.27" x2="1.27" y2="0" width="0.0762" layer="20" curve="90"/>
<wire x1="1.27" y1="0" x2="22.225" y2="0" width="0.0762" layer="20"/>
<wire x1="22.225" y1="0" x2="23.495" y2="1.27" width="0.0762" layer="20" curve="90"/>
<wire x1="23.495" y1="1.27" x2="23.495" y2="19.05" width="0.0762" layer="20"/>
<wire x1="23.495" y1="19.05" x2="22.225" y2="20.32" width="0.0762" layer="20" curve="90"/>
<wire x1="22.225" y1="20.32" x2="1.27" y2="20.32" width="0.0762" layer="20"/>
<wire x1="1.27" y1="20.32" x2="0" y2="19.05" width="0.0762" layer="20" curve="90"/>
<text>ALL THINGS ARE 
DELICATELY 
INTERCONNECTED</text>
<text>XLR</text>
<text>PIEZO</text>
<text>X3</text>
<text>X2</text>
<text>X1</text>
<text>GND</text>
<text>IN1</text>
<text>IN2</text>
<text>rev1.0</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>
</packages>
</library>
<library name="potentiometers">
<packages>
<package name="TRIM1">
<description>&lt;b&gt;Bourns 3362p&lt;/b&gt;
&lt;p&gt;
&lt;a href="http://www.taydaelectronics.com/potentiometer-variable-resistors/cermet-potentiometers/3362p.html"&gt;http://www.taydaelectronics.com/potentiometer-variable-resistors/cermet-potentiometers/3362p.html&lt;/a&gt;</description>
</package>
</packages>
</library>
<library name="supply pins">
<packages>
<package name="PAD1">
<description>&lt;b&gt;Round Pad (w/label) - 80mil Diameter, 47mil Drill&lt;b&gt;</description>
</package>
</packages>
</library>
<library name="transistors-FET">
<packages>
<package name="TO92">
</package>
</packages>
</library>
<library name="resistors">
<packages>
<package name="0.2&quot;">
<description>0.2"  (5mm) lead spacing, 1/8W (flat), 1/4W (standing)</description>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="C1" library="caps-film" package="0.2&quot;.SML" value="220p">
<attribute name="NAME"/>
</element>
<element name="C2" library="caps-film" package="0.2&quot;.SML" value="220p">
<attribute name="NAME"/>
</element>
<element name="C3" library="caps-film" package="0.2&quot;.SML" value="220p">
<attribute name="NAME"/>
</element>
<element name="GAIN" library="potentiometers" package="TRIM1" value="100k">
<attribute name="NAME"/>
</element>
<element name="GND" library="supply pins" package="PAD1" value="PADS.RND_LBL">
<attribute name="NAME"/>
</element>
<element name="IN1" library="supply pins" package="PAD1" value="PADS.RND_LBL">
<attribute name="NAME"/>
</element>
<element name="IN2" library="supply pins" package="PAD1" value="PADS.RND_LBL">
<attribute name="NAME"/>
</element>
<element name="Q1" library="transistors-FET" package="TO92" value="2N5457">
<attribute name="NAME"/>
</element>
<element name="Q2" library="transistors-FET" package="TO92" value="2N5457">
<attribute name="NAME"/>
</element>
<element name="Q3" library="transistors-FET" package="TO92" value="2N5457">
<attribute name="NAME"/>
</element>
<element name="R1" library="resistors" package="0.2&quot;" value="3M">
<attribute name="NAME"/>
</element>
<element name="R2" library="resistors" package="0.2&quot;" value="3M">
<attribute name="NAME"/>
</element>
<element name="R3" library="resistors" package="0.2&quot;" value="150R">
<attribute name="NAME"/>
</element>
<element name="R4" library="resistors" package="0.2&quot;" value="3M">
<attribute name="NAME"/>
</element>
<element name="R5" library="resistors" package="0.2&quot;" value="3M">
<attribute name="NAME"/>
</element>
<element name="X1" library="supply pins" package="PAD1" value="PADS.RND_LBL">
<attribute name="NAME"/>
</element>
<element name="X2" library="supply pins" package="PAD1" value="PADS.RND_LBL">
<attribute name="NAME"/>
</element>
<element name="X3" library="supply pins" package="PAD1" value="PADS.RND_LBL">
<attribute name="NAME"/>
</element>
</elements>
<signals>
<signal name="PZ-IN1">
<contactref element="C1" pad="2"/>
<contactref element="IN1" pad="1"/>
</signal>
<signal name="N$2">
<contactref element="C1" pad="1"/>
<contactref element="Q1" pad="3"/>
<contactref element="R1" pad="1"/>
<contactref element="R2" pad="2"/>
</signal>
<signal name="XLR2">
<contactref element="Q1" pad="1"/>
<contactref element="R3" pad="1"/>
<contactref element="R1" pad="2"/>
<contactref element="X2" pad="1"/>
</signal>
<signal name="N$5">
<contactref element="R3" pad="2"/>
<contactref element="C2" pad="2"/>
</signal>
<signal name="XLR3">
<contactref element="C2" pad="1"/>
<contactref element="Q2" pad="1"/>
<contactref element="X3" pad="1"/>
<contactref element="R4" pad="2"/>
</signal>
<signal name="N$1">
<contactref element="Q1" pad="2"/>
<contactref element="Q2" pad="2"/>
<contactref element="Q3" pad="1"/>
</signal>
<signal name="N$4">
<contactref element="GAIN" pad="3"/>
<contactref element="Q3" pad="2"/>
<contactref element="GAIN" pad="2"/>
</signal>
<signal name="N$6">
<contactref element="R4" pad="1"/>
<contactref element="R5" pad="2"/>
<contactref element="Q2" pad="3"/>
<contactref element="C3" pad="2"/>
</signal>
<signal name="PZ-IN2">
<contactref element="C3" pad="1"/>
<contactref element="IN2" pad="1"/>
</signal>
<signal name="GND">
<contactref element="R2" pad="1"/>
<contactref element="Q3" pad="3"/>
<contactref element="GND" pad="1"/>
<contactref element="GAIN" pad="1"/>
<contactref element="R5" pad="1"/>
<contactref element="X1" pad="1"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
