<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="9.7.0">
<drawing>
<board>
<plain>
<wire x1="21.336" y1="55.88" x2="81.26" y2="55.88" width="0" layer="20"/>
<wire x1="81.26" y1="55.88" x2="81.26" y2="100.508" width="0" layer="20"/>
<wire x1="81.26" y1="100.508" x2="21.336" y2="100.508" width="0" layer="20"/>
<wire x1="21.336" y1="100.508" x2="21.336" y2="55.88" width="0" layer="20"/>
</plain>
<libraries>
<library name="Connector">
<description>Pin Headers |Terminal blocks | D-Sub | Backplane | FFC/FPC | Socket</description>
<packages>
<package name="1X04">
<description>Pin Header</description>
</package>
</packages>
</library>
<library name="fab">
<packages>
<package name="R1206FAB">
</package>
<package name="R1206">
<description>&lt;b&gt;RESISTOR&lt;/b&gt;</description>
</package>
<package name="XIAO_RP2040">
</package>
<package name="OP1206">
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<elements>
<element name="JP1" library="Connector" package="1X04" value="PINHD-1X4">
<attribute name="CATEGORY" value="Connectors"/>
<attribute name="DATASHEET" value=""/>
<attribute name="DESCRIPTION" value="Header-Straight-4 Position"/>
<attribute name="MANUFACTURER" value=""/>
<attribute name="MPN" value=""/>
<attribute name="NAME"/>
<attribute name="OPERATING_TEMPERATURE" value=""/>
<attribute name="PACKAGE_SIZE" value=""/>
<attribute name="PACKAGE_TYPE" value="Through Hole"/>
<attribute name="PART_STATUS" value=""/>
<attribute name="PITCH" value="0.100&quot; (2.54mm)"/>
<attribute name="ROHS" value=""/>
<attribute name="SERIES" value=""/>
<attribute name="SUBCATEGORY" value="Headers"/>
<attribute name="THERMALLOSS" value=""/>
<attribute name="TYPE" value="Male Pins"/>
<attribute name="VALUE"/>
</element>
<element name="R1" library="fab" package="R1206" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="U$1" library="fab" package="XIAO_RP2040" value="XIAO_RP2040XIAO_RP2040">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="U$2" library="fab" package="OP1206" value="Q_PHOTOTRANSISTOR-NPN1206">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R2" library="fab" package="R1206FAB" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
<element name="R3" library="fab" package="R1206FAB" value="">
<attribute name="NAME"/>
<attribute name="VALUE"/>
</element>
</elements>
<signals>
<signal name="N$4">
<contactref element="U$1" pad="1"/>
<contactref element="U$2" pad="COLLECTOR"/>
<contactref element="R1" pad="2"/>
</signal>
<signal name="3V3">
<contactref element="U$1" pad="12"/>
<contactref element="R1" pad="1"/>
<contactref element="JP1" pad="2"/>
<contactref element="R3" pad="2"/>
<contactref element="R2" pad="2"/>
</signal>
<signal name="GND">
<contactref element="U$1" pad="13"/>
<contactref element="U$1" pad="P$1"/>
<contactref element="U$1" pad="P$2"/>
<contactref element="U$1" pad="P$3"/>
<contactref element="U$1" pad="P$4"/>
<contactref element="U$1" pad="P$6"/>
<contactref element="U$1" pad="P$9"/>
<contactref element="U$2" pad="EMITTER"/>
<contactref element="JP1" pad="1"/>
</signal>
<signal name="N$2">
<contactref element="JP1" pad="3"/>
<contactref element="U$1" pad="6"/>
<contactref element="R2" pad="1"/>
</signal>
<signal name="N$3">
<contactref element="JP1" pad="4"/>
<contactref element="U$1" pad="5"/>
<contactref element="R3" pad="1"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
