diff --git a/ic-ti.lbr b/ic-ti.lbr
new file mode 100644
index 0000000..1565129
--- /dev/null
+++ b/ic-ti.lbr
@@ -0,0 +1,230 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE eagle SYSTEM "eagle.dtd">
+<eagle version="7.4.1">
+<drawing>
+<settings>
+<setting alwaysvectorfont="no"/>
+<setting verticaltext="up"/>
+</settings>
+<grid distance="0.1" unitdist="inch" unit="inch" style="lines" multiple="1" display="no" altdistance="0.01" altunitdist="inch" altunit="inch"/>
+<layers>
+<layer number="1" name="Top" color="4" fill="1" visible="yes" active="yes"/>
+<layer number="16" name="Bottom" color="1" fill="1" visible="yes" active="yes"/>
+<layer number="17" name="Pads" color="2" fill="1" visible="yes" active="yes"/>
+<layer number="18" name="Vias" color="2" fill="1" visible="yes" active="yes"/>
+<layer number="19" name="Unrouted" color="6" fill="1" visible="yes" active="yes"/>
+<layer number="20" name="Dimension" color="15" fill="1" visible="yes" active="yes"/>
+<layer number="21" name="tPlace" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="22" name="bPlace" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="23" name="tOrigins" color="15" fill="1" visible="yes" active="yes"/>
+<layer number="24" name="bOrigins" color="15" fill="1" visible="yes" active="yes"/>
+<layer number="25" name="tNames" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="26" name="bNames" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="27" name="tValues" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="28" name="bValues" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="29" name="tStop" color="7" fill="3" visible="no" active="yes"/>
+<layer number="30" name="bStop" color="7" fill="6" visible="no" active="yes"/>
+<layer number="31" name="tCream" color="7" fill="4" visible="no" active="yes"/>
+<layer number="32" name="bCream" color="7" fill="5" visible="no" active="yes"/>
+<layer number="33" name="tFinish" color="6" fill="3" visible="no" active="yes"/>
+<layer number="34" name="bFinish" color="6" fill="6" visible="no" active="yes"/>
+<layer number="35" name="tGlue" color="7" fill="4" visible="no" active="yes"/>
+<layer number="36" name="bGlue" color="7" fill="5" visible="no" active="yes"/>
+<layer number="37" name="tTest" color="7" fill="1" visible="no" active="yes"/>
+<layer number="38" name="bTest" color="7" fill="1" visible="no" active="yes"/>
+<layer number="39" name="tKeepout" color="4" fill="11" visible="yes" active="yes"/>
+<layer number="40" name="bKeepout" color="1" fill="11" visible="yes" active="yes"/>
+<layer number="41" name="tRestrict" color="4" fill="10" visible="yes" active="yes"/>
+<layer number="42" name="bRestrict" color="1" fill="10" visible="yes" active="yes"/>
+<layer number="43" name="vRestrict" color="2" fill="10" visible="yes" active="yes"/>
+<layer number="44" name="Drills" color="7" fill="1" visible="no" active="yes"/>
+<layer number="45" name="Holes" color="7" fill="1" visible="no" active="yes"/>
+<layer number="46" name="Milling" color="3" fill="1" visible="no" active="yes"/>
+<layer number="47" name="Measures" color="7" fill="1" visible="no" active="yes"/>
+<layer number="48" name="Document" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="49" name="Reference" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="51" name="tDocu" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="52" name="bDocu" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="90" name="Modules" color="5" fill="1" visible="yes" active="yes"/>
+<layer number="91" name="Nets" color="2" fill="1" visible="yes" active="yes"/>
+<layer number="92" name="Busses" color="1" fill="1" visible="yes" active="yes"/>
+<layer number="93" name="Pins" color="2" fill="1" visible="no" active="yes"/>
+<layer number="94" name="Symbols" color="4" fill="1" visible="yes" active="yes"/>
+<layer number="95" name="Names" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="96" name="Values" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="97" name="Info" color="7" fill="1" visible="yes" active="yes"/>
+<layer number="98" name="Guide" color="6" fill="1" visible="yes" active="yes"/>
+<layer number="100" name="AnalogFill" color="16" fill="1" visible="yes" active="yes"/>
+</layers>
+<library>
+<packages>
+<package name="DIP-8">
+<wire x1="-5.08" y1="1.016" x2="-5.08" y2="2.286" width="0.1524" layer="21"/>
+<wire x1="-5.08" y1="2.286" x2="-4.445" y2="2.921" width="0.1524" layer="21" curve="-90"/>
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+<pad name="1" x="-3.81" y="-3.81" drill="0.8128" shape="square" rot="R90"/>
+<pad name="2" x="-1.27" y="-3.81" drill="0.8128" rot="R90"/>
+<pad name="7" x="-1.27" y="3.81" drill="0.8128" rot="R90"/>
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+<pad name="5" x="3.81" y="3.81" drill="0.8128" rot="R90"/>
+<text x="-6.35" y="0" size="0.8128" layer="25" ratio="15" rot="R270" align="bottom-center">&gt;NAME</text>
+</package>
+<package name="SO-8">
+<wire x1="2.159" y1="1.9558" x2="-2.159" y2="1.9558" width="0.1524" layer="21"/>
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+<smd name="1" x="-1.905" y="-3.0734" dx="0.6604" dy="2.032" layer="1"/>
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+<text x="-3.81" y="0" size="0.8128" layer="25" ratio="15" rot="R270" align="bottom-center">&gt;NAME</text>
+<rectangle x1="1.651" y1="1.9558" x2="2.159" y2="3.0988" layer="51"/>
+<rectangle x1="-2.159" y1="-3.0988" x2="-1.651" y2="-1.9558" layer="51"/>
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+</package>
+</packages>
+<symbols>
+<symbol name="OPAMP">
+<wire x1="-5.08" y1="5.08" x2="-5.08" y2="-5.08" width="0.6096" layer="94"/>
+<wire x1="-5.08" y1="-5.08" x2="5.08" y2="0" width="0.6096" layer="94"/>
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+<text x="0" y="7.62" size="1.778" layer="94" rot="R180" align="bottom-center">&gt;NAME</text>
+<text x="0" y="-7.62" size="1.778" layer="96" align="bottom-center">&gt;VALUE</text>
+<pin name="IN+" x="-10.16" y="2.54" visible="pad" length="middle" direction="in"/>
+<pin name="IN-" x="-10.16" y="-2.54" visible="pad" length="middle" direction="in" function="dot"/>
+<pin name="OUT" x="10.16" y="0" visible="pad" length="middle" direction="out" rot="R180"/>
+</symbol>
+<symbol name="SUPPLY">
+<wire x1="1.016" y1="3.81" x2="2.54" y2="3.81" width="0.254" layer="94"/>
+<wire x1="1.778" y1="4.572" x2="1.778" y2="3.048" width="0.254" layer="94"/>
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+<text x="0" y="2.54" size="1.778" layer="94" rot="R180" align="bottom-center">&gt;NAME</text>
+<text x="0" y="-0.508" size="1.778" layer="96" rot="R180" align="bottom-center">&gt;VALUE</text>
+<pin name="V+" x="0" y="7.62" visible="pad" length="short" direction="pwr" rot="R270"/>
+<pin name="V-" x="0" y="-7.62" visible="pad" length="short" direction="pwr" rot="R90"/>
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+<wire x1="0" y1="-5.08" x2="0" y2="-3.048" width="0.1524" layer="94"/>
+</symbol>
+</symbols>
+<devicesets>
+<deviceset name="TL072" prefix="DA">
+<gates>
+<gate name=".1" symbol="OPAMP" x="0" y="15.24" swaplevel="1"/>
+<gate name=".2" symbol="OPAMP" x="0" y="-2.54" swaplevel="1"/>
+<gate name="*" symbol="SUPPLY" x="0" y="-20.32"/>
+</gates>
+<devices>
+<device name="IP" package="DIP-8">
+<connects>
+<connect gate="*" pin="V+" pad="8"/>
+<connect gate="*" pin="V-" pad="4"/>
+<connect gate=".1" pin="IN+" pad="3"/>
+<connect gate=".1" pin="IN-" pad="2"/>
+<connect gate=".1" pin="OUT" pad="1"/>
+<connect gate=".2" pin="IN+" pad="5"/>
+<connect gate=".2" pin="IN-" pad="6"/>
+<connect gate=".2" pin="OUT" pad="7"/>
+</connects>
+<technologies>
+<technology name="">
+<attribute name="MOUSER" value="595-TL072IP" constant="no"/>
+</technology>
+</technologies>
+</device>
+<device name="ID" package="SO-8">
+<connects>
+<connect gate="*" pin="V+" pad="8"/>
+<connect gate="*" pin="V-" pad="4"/>
+<connect gate=".1" pin="IN+" pad="3"/>
+<connect gate=".1" pin="IN-" pad="2"/>
+<connect gate=".1" pin="OUT" pad="1"/>
+<connect gate=".2" pin="IN+" pad="5"/>
+<connect gate=".2" pin="IN-" pad="6"/>
+<connect gate=".2" pin="OUT" pad="7"/>
+</connects>
+<technologies>
+<technology name="">
+<attribute name="MOUSER" value="511-TL072IDT" constant="no"/>
+</technology>
+</technologies>
+</device>
+</devices>
+</deviceset>
+<deviceset name="NE5532" prefix="DA">
+<gates>
+<gate name=".1" symbol="OPAMP" x="0" y="15.24" swaplevel="1"/>
+<gate name=".2" symbol="OPAMP" x="0" y="-2.54" swaplevel="1"/>
+<gate name="*" symbol="SUPPLY" x="0" y="-20.32"/>
+</gates>
+<devices>
+<device name="P" package="DIP-8">
+<connects>
+<connect gate="*" pin="V+" pad="8"/>
+<connect gate="*" pin="V-" pad="4"/>
+<connect gate=".1" pin="IN+" pad="3"/>
+<connect gate=".1" pin="IN-" pad="2"/>
+<connect gate=".1" pin="OUT" pad="1"/>
+<connect gate=".2" pin="IN+" pad="5"/>
+<connect gate=".2" pin="IN-" pad="6"/>
+<connect gate=".2" pin="OUT" pad="7"/>
+</connects>
+<technologies>
+<technology name="">
+<attribute name="MOUSER" value="595-SA5532AP" constant="no"/>
+</technology>
+</technologies>
+</device>
+<device name="D" package="SO-8">
+<connects>
+<connect gate="*" pin="V+" pad="8"/>
+<connect gate="*" pin="V-" pad="4"/>
+<connect gate=".1" pin="IN+" pad="3"/>
+<connect gate=".1" pin="IN-" pad="2"/>
+<connect gate=".1" pin="OUT" pad="1"/>
+<connect gate=".2" pin="IN+" pad="5"/>
+<connect gate=".2" pin="IN-" pad="6"/>
+<connect gate=".2" pin="OUT" pad="7"/>
+</connects>
+<technologies>
+<technology name="">
+<attribute name="MOUSER" value="595-NE5532DR" constant="no"/>
+</technology>
+</technologies>
+</device>
+</devices>
+</deviceset>
+</devicesets>
+</library>
+</drawing>
+</eagle>