diff --git a/lbr/Protofusion.lbr b/lbr/Protofusion.lbr
--- a/lbr/Protofusion.lbr
+++ b/lbr/Protofusion.lbr
@@ -6,7 +6,7 @@
 <setting alwaysvectorfont="no"/>
 <setting verticaltext="up"/>
 </settings>
-<grid distance="0.05" unitdist="inch" unit="inch" style="lines" multiple="1" display="yes" altdistance="0.025" altunitdist="inch" altunit="inch"/>
+<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="2" name="Route2" color="1" fill="3" visible="yes" active="yes"/>
@@ -1678,36 +1678,6 @@ Philips SC01_Mounting_1996.pdf</descript
 <text x="-5.715" y="2.5" size="0.8128" layer="25" font="vector" ratio="16">&gt;Name</text>
 <text x="-5.715" y="-3.302" size="0.8128" layer="27" font="vector" ratio="16">&gt;Value</text>
 </package>
-<package name="TO-252-3_DPAK">
-<description>&lt;b&gt;SMALL OUTLINE TRANSISTOR&lt;/b&gt;&lt;p&gt;
-TS-003</description>
-<wire x1="3.2766" y1="3.8354" x2="3.277" y2="-2.159" width="0.2032" layer="21"/>
-<wire x1="3.277" y1="-2.159" x2="-3.277" y2="-2.159" width="0.2032" layer="21"/>
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-<wire x1="-2.5654" y1="3.937" x2="-2.5654" y2="4.6482" width="0.2032" layer="51"/>
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-<wire x1="2.5654" y1="3.937" x2="-2.5654" y2="3.937" width="0.2032" layer="51"/>
-<smd name="2" x="0" y="2.5" dx="5.4" dy="6.2" layer="1"/>
-<smd name="1" x="-2.28" y="-4.8" dx="1" dy="1.6" layer="1"/>
-<smd name="3" x="2.28" y="-4.8" dx="1" dy="1.6" layer="1"/>
-<text x="-3.81" y="-2.54" size="0.8128" layer="25" font="vector" ratio="16" rot="R90">&gt;NAME</text>
-<text x="4.445" y="-2.54" size="0.8128" layer="27" font="vector" ratio="16" rot="R90">&gt;VALUE</text>
-<rectangle x1="-2.7178" y1="-5.1562" x2="-1.8542" y2="-2.2606" layer="51"/>
-<rectangle x1="1.8542" y1="-5.1562" x2="2.7178" y2="-2.2606" layer="51"/>
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-<polygon width="0.2032" layer="51">
-<vertex x="-2.5654" y="3.937"/>
-<vertex x="-2.5654" y="4.6482"/>
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-<vertex x="2.1082" y="5.1054"/>
-<vertex x="2.5654" y="4.6482"/>
-<vertex x="2.5654" y="3.937"/>
-</polygon>
-</package>
 <package name="FIDUCIAL-1.5X3">
 <circle x="0" y="0" radius="0.9055" width="1.27" layer="29"/>
 <circle x="0" y="0" radius="0.9055" width="1.27" layer="29"/>
@@ -1769,39 +1739,6 @@ SMB footprint. Diode polarity has been r
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 <rectangle x1="-2.0516" y1="2.2828" x2="-1.8484" y2="3.121" layer="51"/>
 </package>
-<package name="TO-263-3_D2PAK">
-<wire x1="5" y1="-1" x2="5" y2="-3.4" width="0.2032" layer="21"/>
-<wire x1="5" y1="-3.4" x2="-5" y2="-3.4" width="0.2032" layer="21"/>
-<wire x1="-5" y1="-3.4" x2="-5" y2="-1" width="0.2032" layer="21"/>
-<rectangle x1="-3.27" y1="-7.6" x2="-1.81" y2="-3.4" layer="51"/>
-<rectangle x1="-0.73" y1="-4.9" x2="0.73" y2="-3.4" layer="21"/>
-<smd name="1" x="-2.54" y="-7.045" dx="2.32" dy="3.81" layer="1"/>
-<smd name="3" x="2.54" y="-7.045" dx="2.32" dy="3.81" layer="1"/>
-<smd name="2" x="0" y="4.125" dx="11" dy="9.65" layer="1"/>
-<text x="-2.54" y="-2.54" size="0.8128" layer="25" font="vector" ratio="16" rot="R90">&gt;NAME</text>
-<text x="3.81" y="-2.54" size="0.8128" layer="27" font="vector" ratio="16" rot="R90">&gt;VALUE</text>
-<polygon width="0.1998" layer="51">
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-<rectangle x1="1.81" y1="-4.9" x2="3.27" y2="-3.4" layer="21"/>
-</package>
 </packages>
 <symbols>
 <symbol name="VOM1271">
@@ -2903,6 +2840,46 @@ short conditions is included.</descripti
 <text x="5.08" y="2.54" size="1.778" layer="95">&gt;NAME</text>
 <text x="5.08" y="-5.08" size="1.778" layer="96">&gt;VALUE</text>
 </symbol>
+<symbol name="OK">
+<wire x1="-2.413" y1="-1.143" x2="-1.016" y2="0.254" width="0.1524" layer="94"/>
+<wire x1="-1.016" y1="0.254" x2="-1.905" y2="-0.127" width="0.1524" layer="94"/>
+<wire x1="-1.905" y1="-0.127" x2="-1.397" y2="-0.635" width="0.1524" layer="94"/>
+<wire x1="-1.397" y1="-0.635" x2="-1.016" y2="0.254" width="0.1524" layer="94"/>
+<wire x1="-1.143" y1="1.397" x2="-2.032" y2="1.016" width="0.1524" layer="94"/>
+<wire x1="-2.032" y1="1.016" x2="-1.524" y2="0.508" width="0.1524" layer="94"/>
+<wire x1="-1.524" y1="0.508" x2="-1.143" y2="1.397" width="0.1524" layer="94"/>
+<wire x1="-2.54" y1="0" x2="-1.143" y2="1.397" width="0.1524" layer="94"/>
+<wire x1="-3.175" y1="1.27" x2="-4.445" y2="-1.27" width="0.254" layer="94"/>
+<wire x1="-4.445" y1="-1.27" x2="-5.715" y2="1.27" width="0.254" layer="94"/>
+<wire x1="-3.175" y1="-1.27" x2="-4.445" y2="-1.27" width="0.254" layer="94"/>
+<wire x1="-4.445" y1="-1.27" x2="-5.715" y2="-1.27" width="0.254" layer="94"/>
+<wire x1="-3.175" y1="1.27" x2="-4.445" y2="1.27" width="0.254" layer="94"/>
+<wire x1="-4.445" y1="1.27" x2="-4.445" y2="-1.27" width="0.254" layer="94"/>
+<wire x1="-4.445" y1="1.27" x2="-5.715" y2="1.27" width="0.254" layer="94"/>
+<wire x1="-6.985" y1="5.08" x2="4.445" y2="5.08" width="0.4064" layer="94"/>
+<wire x1="-6.985" y1="-5.08" x2="4.445" y2="-5.08" width="0.4064" layer="94"/>
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+<wire x1="-6.985" y1="5.08" x2="-6.985" y2="-5.08" width="0.4064" layer="94"/>
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+<wire x1="-4.445" y1="-2.54" x2="-7.62" y2="-2.54" width="0.1524" layer="94"/>
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+<wire x1="2.54" y1="2.54" x2="5.08" y2="2.54" width="0.1524" layer="94"/>
+<wire x1="1.778" y1="-1.016" x2="2.286" y2="-2.286" width="0.1524" layer="94"/>
+<wire x1="2.286" y1="-2.286" x2="2.54" y2="-2.54" width="0.1524" layer="94"/>
+<wire x1="2.286" y1="-2.286" x2="1.016" y2="-1.778" width="0.1524" layer="94"/>
+<wire x1="1.016" y1="-1.778" x2="1.778" y2="-1.016" width="0.1524" layer="94"/>
+<text x="-6.985" y="5.715" size="1.778" layer="95">&gt;NAME</text>
+<text x="-6.985" y="-7.62" size="1.778" layer="96">&gt;VALUE</text>
+<rectangle x1="-0.381" y1="-2.54" x2="0.381" y2="2.54" layer="94"/>
+<pin name="A" x="-10.16" y="2.54" visible="pad" length="short" direction="pas"/>
+<pin name="C" x="-10.16" y="-2.54" visible="pad" length="short" direction="pas"/>
+<pin name="EMIT" x="7.62" y="-2.54" visible="pad" length="short" direction="pas" rot="R180"/>
+<pin name="COL" x="7.62" y="2.54" visible="pad" length="short" direction="pas" rot="R180"/>
+</symbol>
 </symbols>
 <devicesets>
 <deviceset name="VOM1271" prefix="U">
@@ -4129,33 +4106,6 @@ Source: http://www.nxp.com/documents/dat
 </device>
 </devices>
 </deviceset>
-<deviceset name="MOSFET-N" prefix="Q">
-<gates>
-<gate name="G$1" symbol="MOSFET-N" x="-2.54" y="0"/>
-</gates>
-<devices>
-<device name="DPAK" package="TO-252-3_DPAK">
-<connects>
-<connect gate="G$1" pin="D" pad="2"/>
-<connect gate="G$1" pin="G" pad="1"/>
-<connect gate="G$1" pin="S" pad="3"/>
-</connects>
-<technologies>
-<technology name=""/>
-</technologies>
-</device>
-<device name="D2PAK" package="TO-263-3_D2PAK">
-<connects>
-<connect gate="G$1" pin="D" pad="2"/>
-<connect gate="G$1" pin="G" pad="1"/>
-<connect gate="G$1" pin="S" pad="3"/>
-</connects>
-<technologies>
-<technology name=""/>
-</technologies>
-</device>
-</devices>
-</deviceset>
 <deviceset name="ACS711" prefix="U">
 <description>&lt;b&gt;Hall Effect Linear Current Sensor&lt;/b&gt;
 &lt;p&gt;&lt;u&gt;Part Number&lt;/u&gt;
@@ -4235,6 +4185,24 @@ Source: http://www.nxp.com/documents/dat
 </device>
 </devices>
 </deviceset>
+<deviceset name="HCPL-181">
+<gates>
+<gate name="G$1" symbol="OK" x="0" y="0"/>
+</gates>
+<devices>
+<device name="SOP4" package="SOP4">
+<connects>
+<connect gate="G$1" pin="A" pad="1"/>
+<connect gate="G$1" pin="C" pad="2"/>
+<connect gate="G$1" pin="COL" pad="4"/>
+<connect gate="G$1" pin="EMIT" pad="3"/>
+</connects>
+<technologies>
+<technology name=""/>
+</technologies>
+</device>
+</devices>
+</deviceset>
 </devicesets>
 </library>
 </drawing>