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Merge pull request #6 from ShikyC/piezoelectric_ceramics

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Update with piezo sensors
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ShikyC 2023-12-21 17:56:31 -08:00 committed by GitHub
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13 changed files with 131 additions and 6787 deletions
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.gitignore vendored Normal file
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build/
.vscode/

4801
Eagle/sanro_arduino/E14_Arduino_revB.lbr
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Eagle/sanro_arduino/eagle.epf
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[Eagle]
Version="07 05 00"
Platform="Mac OS X"
Serial="62191E841E-LSR-WLM-1EL"
Globals="Globals"
Desktop="Desktop"
[Globals]
AutoSaveProject=1
[Win_1]
Type="Control Panel"
Loc="4 23 1439 899"
State=2
Number=0
[Desktop]
Screen="1440 900"
Window="Win_1"

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Eagle/sanro_arduino/sanro.brd
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<wire x1="43.815" y1="7.747" x2="42.545" y2="7.747" width="0.1524" layer="21"/>
<wire x1="46.355" y1="7.747" x2="45.085" y2="7.747" width="0.1524" layer="21"/>
<wire x1="46.99" y1="3.302" x2="46.99" y2="7.112" width="0.1524" layer="21"/>
<pad name="GND_" x="45.72" y="6.477" drill="1.016" diameter="1.5748" shape="octagon" rot="R180"/>
<pad name="RESET.." x="45.72" y="3.937" drill="1.016" diameter="1.5748" shape="octagon" rot="R180"/>
<pad name="MOSI." x="43.18" y="6.477" drill="1.016" diameter="1.5748" shape="octagon" rot="R180"/>
<pad name="SCK." x="43.18" y="3.937" drill="1.016" diameter="1.5748" shape="octagon" rot="R180"/>
<pad name="5V" x="40.64" y="6.477" drill="1.016" diameter="1.5748" shape="octagon" rot="R180"/>
<pad name="MISO." x="40.64" y="3.937" drill="1.016" diameter="1.5748" shape="octagon" rot="R180"/>
<rectangle x1="45.466" y1="6.223" x2="45.974" y2="6.731" layer="51" rot="R180"/>
<rectangle x1="45.466" y1="3.683" x2="45.974" y2="4.191" layer="51" rot="R180"/>
<rectangle x1="42.926" y1="3.683" x2="43.434" y2="4.191" layer="51" rot="R180"/>
<rectangle x1="42.926" y1="6.223" x2="43.434" y2="6.731" layer="51" rot="R180"/>
<rectangle x1="40.386" y1="3.683" x2="40.894" y2="4.191" layer="51" rot="R180"/>
<rectangle x1="40.386" y1="6.223" x2="40.894" y2="6.731" layer="51" rot="R180"/>
<text x="19.05" y="10.16" size="1.27" layer="21">Arduino</text>
<text x="19.05" y="8.255" size="1.27" layer="21">Micro</text>
<text x="4.826" y="15.875" size="0.508" layer="21">1
2</text>
<text x="7.366" y="15.875" size="0.508" layer="21">1
1</text>
<text x="9.906" y="15.875" size="0.508" layer="21">1
0</text>
<text x="12.446" y="16.256" size="0.508" layer="21">9</text>
<text x="14.986" y="15.875" size="0.508" layer="21">8</text>
<text x="17.526" y="15.875" size="0.508" layer="21">7</text>
<text x="20.066" y="15.875" size="0.508" layer="21">6</text>
<text x="22.606" y="15.875" size="0.508" layer="21">5</text>
<text x="25.146" y="15.875" size="0.508" layer="21">4</text>
<text x="27.686" y="15.875" size="0.508" layer="21">3</text>
<text x="30.226" y="15.875" size="0.508" layer="21">2</text>
<text x="32.766" y="15.875" size="0.508" layer="21">G</text>
<text x="35.306" y="15.875" size="0.508" layer="21">R</text>
<text x="37.846" y="15.875" size="0.508" layer="21">R
X</text>
<text x="40.386" y="15.875" size="0.508" layer="21">T
X</text>
<text x="42.926" y="15.875" size="0.508" layer="21">S
S</text>
<text x="43.688" y="14.986" size="0.508" layer="21">MOSI</text>
<text x="47.244" y="2.921" size="0.508" layer="21">S
C
K</text>
<text x="43.053" y="0.762" size="0.508" layer="21">M
I</text>
<text x="40.513" y="0.762" size="0.508" layer="21">V
I</text>
<text x="37.973" y="1.524" size="0.508" layer="21">G</text>
<text x="35.306" y="0.762" size="0.508" layer="21">R
S</text>
<text x="32.766" y="0.762" size="0.508" layer="21">5
V</text>
<text x="25.146" y="0.635" size="0.508" layer="21">A
5</text>
<text x="22.606" y="0.635" size="0.508" layer="21">A
4</text>
<text x="20.066" y="0.635" size="0.508" layer="21">A
3</text>
<text x="17.526" y="0.635" size="0.508" layer="21">A
2</text>
<text x="14.986" y="0.635" size="0.508" layer="21">A
1</text>
<text x="12.446" y="0.635" size="0.508" layer="21">A
0</text>
<text x="10.033" y="0.635" size="0.508" layer="21">R
F</text>
<text x="7.366" y="0.635" size="0.508" layer="21">3
V</text>
<text x="4.826" y="0.635" size="0.508" layer="21">1
3</text>
<wire x1="47.244" y1="2.794" x2="46.482" y2="2.032" width="0.127" layer="21"/>
<wire x1="46.482" y1="2.032" x2="45.085" y2="2.032" width="0.127" layer="21"/>
</package>
</packages>
</library>
<library name="con-lstb">
<description>&lt;b&gt;Pin Headers&lt;/b&gt;&lt;p&gt;
Naming:&lt;p&gt;
MA = male&lt;p&gt;
# contacts - # rows&lt;p&gt;
W = angled&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="MA04-1">
<description>&lt;b&gt;PIN HEADER&lt;/b&gt;</description>
<wire x1="-4.445" y1="1.27" x2="-3.175" y2="1.27" width="0.1524" layer="21"/>
<wire x1="-3.175" y1="1.27" x2="-2.54" y2="0.635" width="0.1524" layer="21"/>
<wire x1="-2.54" y1="-0.635" x2="-3.175" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="-2.54" y1="0.635" x2="-1.905" y2="1.27" width="0.1524" layer="21"/>
<wire x1="-1.905" y1="1.27" x2="-0.635" y2="1.27" width="0.1524" layer="21"/>
<wire x1="-0.635" y1="1.27" x2="0" y2="0.635" width="0.1524" layer="21"/>
<wire x1="0" y1="-0.635" x2="-0.635" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="-0.635" y1="-1.27" x2="-1.905" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="-1.905" y1="-1.27" x2="-2.54" y2="-0.635" width="0.1524" layer="21"/>
<wire x1="-5.08" y1="0.635" x2="-5.08" y2="-0.635" width="0.1524" layer="21"/>
<wire x1="-4.445" y1="1.27" x2="-5.08" y2="0.635" width="0.1524" layer="21"/>
<wire x1="-5.08" y1="-0.635" x2="-4.445" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="-3.175" y1="-1.27" x2="-4.445" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="0" y1="0.635" x2="0.635" y2="1.27" width="0.1524" layer="21"/>
<wire x1="0.635" y1="1.27" x2="1.905" y2="1.27" width="0.1524" layer="21"/>
<wire x1="1.905" y1="1.27" x2="2.54" y2="0.635" width="0.1524" layer="21"/>
<wire x1="2.54" y1="-0.635" x2="1.905" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="1.905" y1="-1.27" x2="0.635" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="0.635" y1="-1.27" x2="0" y2="-0.635" width="0.1524" layer="21"/>
<wire x1="3.175" y1="1.27" x2="4.445" y2="1.27" width="0.1524" layer="21"/>
<wire x1="4.445" y1="1.27" x2="5.08" y2="0.635" width="0.1524" layer="21"/>
<wire x1="5.08" y1="0.635" x2="5.08" y2="-0.635" width="0.1524" layer="21"/>
<wire x1="5.08" y1="-0.635" x2="4.445" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="3.175" y1="1.27" x2="2.54" y2="0.635" width="0.1524" layer="21"/>
<wire x1="2.54" y1="-0.635" x2="3.175" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="4.445" y1="-1.27" x2="3.175" y2="-1.27" width="0.1524" layer="21"/>
<pad name="1" x="-3.81" y="0" drill="1.016" shape="long" rot="R90"/>
<pad name="2" x="-1.27" y="0" drill="1.016" shape="long" rot="R90"/>
<pad name="3" x="1.27" y="0" drill="1.016" shape="long" rot="R90"/>
<pad name="4" x="3.81" y="0" drill="1.016" shape="long" rot="R90"/>
<text x="-5.08" y="1.651" size="1.27" layer="25" ratio="10">&gt;NAME</text>
<text x="-6.223" y="-0.635" size="1.27" layer="21" ratio="10">1</text>
<text x="0.635" y="1.651" size="1.27" layer="27" ratio="10">&gt;VALUE</text>
<text x="5.334" y="-0.635" size="1.27" layer="21" ratio="10">4</text>
<rectangle x1="-1.524" y1="-0.254" x2="-1.016" y2="0.254" layer="51"/>
<rectangle x1="-4.064" y1="-0.254" x2="-3.556" y2="0.254" layer="51"/>
<rectangle x1="1.016" y1="-0.254" x2="1.524" y2="0.254" layer="51"/>
<rectangle x1="3.556" y1="-0.254" x2="4.064" y2="0.254" layer="51"/>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<classes>
<class number="0" name="default" width="0" drill="0">
</class>
</classes>
<designrules name="default">
<description language="de">&lt;b&gt;EAGLE Design Rules&lt;/b&gt;
&lt;p&gt;
Die Standard-Design-Rules sind so gewählt, dass sie für
die meisten Anwendungen passen. Sollte ihre Platine
besondere Anforderungen haben, treffen Sie die erforderlichen
Einstellungen hier und speichern die Design Rules unter
einem neuen Namen ab.</description>
<description language="en">&lt;b&gt;EAGLE Design Rules&lt;/b&gt;
&lt;p&gt;
The default Design Rules have been set to cover
a wide range of applications. Your particular design
may have different requirements, so please make the
necessary adjustments and save your customized
design rules under a new name.</description>
<param name="layerSetup" value="(1*16)"/>
<param name="mtCopper" value="0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm"/>
<param name="mtIsolate" value="1.5mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm"/>
<param name="mdWireWire" value="8mil"/>
<param name="mdWirePad" value="8mil"/>
<param name="mdWireVia" value="8mil"/>
<param name="mdPadPad" value="8mil"/>
<param name="mdPadVia" value="8mil"/>
<param name="mdViaVia" value="8mil"/>
<param name="mdSmdPad" value="8mil"/>
<param name="mdSmdVia" value="8mil"/>
<param name="mdSmdSmd" value="8mil"/>
<param name="mdViaViaSameLayer" value="8mil"/>
<param name="mnLayersViaInSmd" value="2"/>
<param name="mdCopperDimension" value="40mil"/>
<param name="mdDrill" value="8mil"/>
<param name="mdSmdStop" value="0mil"/>
<param name="msWidth" value="10mil"/>
<param name="msDrill" value="24mil"/>
<param name="msMicroVia" value="9.99mm"/>
<param name="msBlindViaRatio" value="0.5"/>
<param name="rvPadTop" value="0.25"/>
<param name="rvPadInner" value="0.25"/>
<param name="rvPadBottom" value="0.25"/>
<param name="rvViaOuter" value="0.25"/>
<param name="rvViaInner" value="0.25"/>
<param name="rvMicroViaOuter" value="0.25"/>
<param name="rvMicroViaInner" value="0.25"/>
<param name="rlMinPadTop" value="10mil"/>
<param name="rlMaxPadTop" value="20mil"/>
<param name="rlMinPadInner" value="10mil"/>
<param name="rlMaxPadInner" value="20mil"/>
<param name="rlMinPadBottom" value="10mil"/>
<param name="rlMaxPadBottom" value="20mil"/>
<param name="rlMinViaOuter" value="8mil"/>
<param name="rlMaxViaOuter" value="20mil"/>
<param name="rlMinViaInner" value="8mil"/>
<param name="rlMaxViaInner" value="20mil"/>
<param name="rlMinMicroViaOuter" value="4mil"/>
<param name="rlMaxMicroViaOuter" value="20mil"/>
<param name="rlMinMicroViaInner" value="4mil"/>
<param name="rlMaxMicroViaInner" value="20mil"/>
<param name="psTop" value="-1"/>
<param name="psBottom" value="-1"/>
<param name="psFirst" value="-1"/>
<param name="psElongationLong" value="100"/>
<param name="psElongationOffset" value="100"/>
<param name="mvStopFrame" value="1"/>
<param name="mvCreamFrame" value="0"/>
<param name="mlMinStopFrame" value="4mil"/>
<param name="mlMaxStopFrame" value="4mil"/>
<param name="mlMinCreamFrame" value="0mil"/>
<param name="mlMaxCreamFrame" value="0mil"/>
<param name="mlViaStopLimit" value="0mil"/>
<param name="srRoundness" value="0"/>
<param name="srMinRoundness" value="0mil"/>
<param name="srMaxRoundness" value="0mil"/>
<param name="slThermalIsolate" value="10mil"/>
<param name="slThermalsForVias" value="0"/>
<param name="dpMaxLengthDifference" value="10mm"/>
<param name="dpGapFactor" value="2.5"/>
<param name="checkGrid" value="0"/>
<param name="checkAngle" value="0"/>
<param name="checkFont" value="1"/>
<param name="checkRestrict" value="1"/>
<param name="useDiameter" value="13"/>
<param name="maxErrors" value="50"/>
</designrules>
<autorouter>
<pass name="Default">
<param name="RoutingGrid" value="50mil"/>
<param name="AutoGrid" value="1"/>
<param name="Efforts" value="2"/>
<param name="TopRouterVariant" value="1"/>
<param name="tpViaShape" value="round"/>
<param name="PrefDir.1" value="0"/>
<param name="PrefDir.2" value="0"/>
<param name="PrefDir.3" value="0"/>
<param name="PrefDir.4" value="0"/>
<param name="PrefDir.5" value="0"/>
<param name="PrefDir.6" value="0"/>
<param name="PrefDir.7" value="0"/>
<param name="PrefDir.8" value="0"/>
<param name="PrefDir.9" value="0"/>
<param name="PrefDir.10" value="0"/>
<param name="PrefDir.11" value="0"/>
<param name="PrefDir.12" value="0"/>
<param name="PrefDir.13" value="0"/>
<param name="PrefDir.14" value="0"/>
<param name="PrefDir.15" value="0"/>
<param name="PrefDir.16" value="a"/>
<param name="cfVia" value="8"/>
<param name="cfNonPref" value="5"/>
<param name="cfChangeDir" value="2"/>
<param name="cfOrthStep" value="2"/>
<param name="cfDiagStep" value="3"/>
<param name="cfExtdStep" value="0"/>
<param name="cfBonusStep" value="1"/>
<param name="cfMalusStep" value="1"/>
<param name="cfPadImpact" value="4"/>
<param name="cfSmdImpact" value="4"/>
<param name="cfBusImpact" value="0"/>
<param name="cfHugging" value="3"/>
<param name="cfAvoid" value="4"/>
<param name="cfPolygon" value="10"/>
<param name="cfBase.1" value="0"/>
<param name="cfBase.2" value="1"/>
<param name="cfBase.3" value="1"/>
<param name="cfBase.4" value="1"/>
<param name="cfBase.5" value="1"/>
<param name="cfBase.6" value="1"/>
<param name="cfBase.7" value="1"/>
<param name="cfBase.8" value="1"/>
<param name="cfBase.9" value="1"/>
<param name="cfBase.10" value="1"/>
<param name="cfBase.11" value="1"/>
<param name="cfBase.12" value="1"/>
<param name="cfBase.13" value="1"/>
<param name="cfBase.14" value="1"/>
<param name="cfBase.15" value="1"/>
<param name="cfBase.16" value="0"/>
<param name="mnVias" value="20"/>
<param name="mnSegments" value="9999"/>
<param name="mnExtdSteps" value="9999"/>
<param name="mnRipupLevel" value="10"/>
<param name="mnRipupSteps" value="100"/>
<param name="mnRipupTotal" value="100"/>
</pass>
<pass name="Follow-me" refer="Default" active="yes">
</pass>
<pass name="Busses" refer="Default" active="yes">
<param name="cfNonPref" value="4"/>
<param name="cfBusImpact" value="4"/>
<param name="cfHugging" value="0"/>
<param name="mnVias" value="0"/>
</pass>
<pass name="Route" refer="Default" active="yes">
</pass>
<pass name="Optimize1" refer="Default" active="yes">
<param name="cfVia" value="99"/>
<param name="cfExtdStep" value="10"/>
<param name="cfHugging" value="1"/>
<param name="mnExtdSteps" value="1"/>
<param name="mnRipupLevel" value="0"/>
</pass>
<pass name="Optimize2" refer="Optimize1" active="yes">
<param name="cfNonPref" value="0"/>
<param name="cfChangeDir" value="6"/>
<param name="cfExtdStep" value="0"/>
<param name="cfBonusStep" value="2"/>
<param name="cfMalusStep" value="2"/>
<param name="cfPadImpact" value="2"/>
<param name="cfSmdImpact" value="2"/>
<param name="cfHugging" value="0"/>
</pass>
<pass name="Optimize3" refer="Optimize2" active="yes">
<param name="cfChangeDir" value="8"/>
<param name="cfPadImpact" value="0"/>
<param name="cfSmdImpact" value="0"/>
</pass>
<pass name="Optimize4" refer="Optimize3" active="yes">
<param name="cfChangeDir" value="25"/>
</pass>
</autorouter>
<elements>
<element name="PCB1" library="E14_Arduino_revB" package="ARDUINO_MICRO" value="ARDUINO_MICRO" x="1.27" y="15.24"/>
<element name="LD" library="con-lstb" package="MA04-1" value="" x="8.89" y="6.35" smashed="yes" rot="R270">
<attribute name="MPN" value="" x="8.89" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="MF" value="" x="8.89" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="OC_NEWARK" value="unknown" x="8.89" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="OC_FARNELL" value="unknown" x="8.89" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="NAME" x="10.541" y="3.81" size="1.27" layer="25" ratio="10" rot="R270"/>
<attribute name="VALUE" x="10.541" y="5.715" size="1.27" layer="27" ratio="10" rot="R270"/>
</element>
<element name="RD" library="con-lstb" package="MA04-1" value="" x="13.97" y="6.35" smashed="yes" rot="R270">
<attribute name="MPN" value="" x="13.97" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="MF" value="" x="13.97" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="OC_NEWARK" value="unknown" x="13.97" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="OC_FARNELL" value="unknown" x="13.97" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="NAME" x="15.621" y="3.81" size="1.27" layer="25" ratio="10" rot="R270"/>
<attribute name="VALUE" x="15.621" y="5.715" size="1.27" layer="27" ratio="10" rot="R270"/>
</element>
<element name="LK" library="con-lstb" package="MA04-1" value="" x="19.05" y="6.35" smashed="yes" rot="R270">
<attribute name="MPN" value="" x="19.05" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="MF" value="" x="19.05" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="OC_NEWARK" value="unknown" x="19.05" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="OC_FARNELL" value="unknown" x="19.05" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="NAME" x="20.701" y="3.81" size="1.27" layer="25" ratio="10" rot="R270"/>
<attribute name="VALUE" x="20.701" y="5.715" size="1.27" layer="27" ratio="10" rot="R270"/>
</element>
<element name="RK" library="con-lstb" package="MA04-1" value="" x="24.13" y="6.35" smashed="yes" rot="R270">
<attribute name="MPN" value="" x="24.13" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="MF" value="" x="24.13" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="OC_NEWARK" value="unknown" x="24.13" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="OC_FARNELL" value="unknown" x="24.13" y="6.35" size="1.778" layer="27" rot="R270" display="off"/>
<attribute name="NAME" x="25.781" y="3.81" size="1.27" layer="25" ratio="10" rot="R270"/>
<attribute name="VALUE" x="25.781" y="5.715" size="1.27" layer="27" ratio="10" rot="R270"/>
</element>
</elements>
<signals>
<signal name="N$1">
<contactref element="LD" pad="1"/>
<contactref element="PCB1" pad="A0"/>
<wire x1="8.89" y1="10.16" x2="12.7" y2="13.97" width="1.016" layer="16"/>
<wire x1="12.7" y1="13.97" x2="12.7" y2="16.51" width="1.016" layer="16"/>
</signal>
<signal name="N$2">
<contactref element="PCB1" pad="A1"/>
<contactref element="RD" pad="1"/>
<wire x1="13.97" y1="10.16" x2="15.24" y2="11.43" width="1.016" layer="16"/>
<wire x1="15.24" y1="11.43" x2="15.24" y2="16.51" width="1.016" layer="16"/>
</signal>
<signal name="N$3">
<contactref element="LK" pad="1"/>
<contactref element="PCB1" pad="A2"/>
<wire x1="19.05" y1="10.16" x2="17.78" y2="11.43" width="1.016" layer="16"/>
<wire x1="17.78" y1="11.43" x2="17.78" y2="16.51" width="1.016" layer="16"/>
</signal>
<signal name="N$4">
<contactref element="PCB1" pad="A3"/>
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347
Eagle/sanro_arduino/sanro.eps
View File

@ -1,347 +0,0 @@
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newpath 50 40 moveto ( Job has been aborted!) show
showpage
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/i 0 def
product { dup 97 lt { 32 add } if Product exch i exch put /i i 1 add def } forall
Product (ghostscript) search dup /IsGhostscript exch def
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629
Eagle/sanro_arduino/sanro.sch
View File

@ -1,629 +0,0 @@
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<wire x1="-25.4" y1="-15.24" x2="-25.4" y2="12.7" width="0.254" layer="94"/>
<text x="-10.16" y="-2.54" size="3.81" layer="94">ARDUINO</text>
<pin name="5V" x="17.78" y="-2.54" visible="off" length="point" rot="R270"/>
<pin name="MOSI." x="20.32" y="-2.54" visible="off" length="point" rot="R270"/>
<pin name="GND_" x="22.86" y="-2.54" visible="off" length="point" rot="R270"/>
<pin name="RESET.." x="22.86" y="-5.08" visible="off" length="point" rot="R90"/>
<pin name="SCK." x="20.32" y="-5.08" visible="off" length="point" rot="R90"/>
<pin name="MISO." x="17.78" y="-5.08" visible="off" length="point" rot="R90"/>
<text x="14.224" y="-1.778" size="1.27" layer="94" rot="R270">ICSP</text>
<circle x="16.256" y="-5.842" radius="0.254" width="0.254" layer="94"/>
<pin name="VIN" x="17.78" y="-17.78" length="short" rot="R90"/>
<text x="-6.35" y="-7.62" size="3.81" layer="94">MICRO</text>
<pin name="SS" x="20.32" y="15.24" length="short" rot="R270"/>
<pin name="MOSI" x="22.86" y="15.24" length="short" rot="R270"/>
<pin name="MISO" x="20.32" y="-17.78" length="short" rot="R90"/>
<pin name="SCK" x="22.86" y="-17.78" length="short" rot="R90"/>
<pin name="&lt;USB&gt;ID" x="-27.94" y="-5.08" length="short"/>
</symbol>
</symbols>
<devicesets>
<deviceset name="ARDUINO_MICRO" prefix="PCB">
<description>Device for representing an Arduino Micro board with a footprint in an EAGLE design. Created by Dave Young for Element14. More EAGLE documentation at: http://www.element14.com/community/community/knode/cadsoft_eagle</description>
<gates>
<gate name="G$1" symbol="ARDUINO_MICRO" x="0" y="2.54"/>
</gates>
<devices>
<device name="" package="ARDUINO_MICRO">
<connects>
<connect gate="G$1" pin="+5V" pad="+5V"/>
<connect gate="G$1" pin="3V3" pad="3V3"/>
<connect gate="G$1" pin="5V" pad="5V"/>
<connect gate="G$1" pin="&lt;USB&gt;+V" pad="&lt;USB&gt;+V"/>
<connect gate="G$1" pin="&lt;USB&gt;D+" pad="&lt;USB&gt;D+"/>
<connect gate="G$1" pin="&lt;USB&gt;D-" pad="&lt;USB&gt;D-"/>
<connect gate="G$1" pin="&lt;USB&gt;GND" pad="&lt;USB&gt;GND"/>
<connect gate="G$1" pin="&lt;USB&gt;ID" pad="&lt;USB&gt;ID"/>
<connect gate="G$1" pin="A0" pad="A0"/>
<connect gate="G$1" pin="A1" pad="A1"/>
<connect gate="G$1" pin="A2" pad="A2"/>
<connect gate="G$1" pin="A3" pad="A3"/>
<connect gate="G$1" pin="A4" pad="A4"/>
<connect gate="G$1" pin="A5" pad="A5"/>
<connect gate="G$1" pin="D10" pad="D10"/>
<connect gate="G$1" pin="D11" pad="D11"/>
<connect gate="G$1" pin="D12" pad="D12"/>
<connect gate="G$1" pin="D13" pad="D13"/>
<connect gate="G$1" pin="D2" pad="D2"/>
<connect gate="G$1" pin="D3" pad="D3"/>
<connect gate="G$1" pin="D4" pad="D4"/>
<connect gate="G$1" pin="D5" pad="D5"/>
<connect gate="G$1" pin="D6" pad="D6"/>
<connect gate="G$1" pin="D7" pad="D7"/>
<connect gate="G$1" pin="D8" pad="D8"/>
<connect gate="G$1" pin="D9" pad="D9"/>
<connect gate="G$1" pin="GND" pad="GND"/>
<connect gate="G$1" pin="GND." pad="GND."/>
<connect gate="G$1" pin="GND_" pad="GND_"/>
<connect gate="G$1" pin="MISO" pad="MISO]"/>
<connect gate="G$1" pin="MISO." pad="MISO."/>
<connect gate="G$1" pin="MOSI" pad="MOSI"/>
<connect gate="G$1" pin="MOSI." pad="MOSI."/>
<connect gate="G$1" pin="NC" pad="NC"/>
<connect gate="G$1" pin="NC." pad="NC."/>
<connect gate="G$1" pin="REF" pad="REF"/>
<connect gate="G$1" pin="RESET.." pad="RESET.."/>
<connect gate="G$1" pin="RST" pad="RST"/>
<connect gate="G$1" pin="RST." pad="RST."/>
<connect gate="G$1" pin="RX" pad="RX1"/>
<connect gate="G$1" pin="SCK" pad="SCK"/>
<connect gate="G$1" pin="SCK." pad="SCK."/>
<connect gate="G$1" pin="SS" pad="SS"/>
<connect gate="G$1" pin="TX" pad="TX1"/>
<connect gate="G$1" pin="VIN" pad="VIN"/>
</connects>
<technologies>
<technology name=""/>
</technologies>
</device>
</devices>
</deviceset>
</devicesets>
</library>
<library name="con-lstb">
<description>&lt;b&gt;Pin Headers&lt;/b&gt;&lt;p&gt;
Naming:&lt;p&gt;
MA = male&lt;p&gt;
# contacts - # rows&lt;p&gt;
W = angled&lt;p&gt;
&lt;author&gt;Created by librarian@cadsoft.de&lt;/author&gt;</description>
<packages>
<package name="MA04-1">
<description>&lt;b&gt;PIN HEADER&lt;/b&gt;</description>
<wire x1="-4.445" y1="1.27" x2="-3.175" y2="1.27" width="0.1524" layer="21"/>
<wire x1="-3.175" y1="1.27" x2="-2.54" y2="0.635" width="0.1524" layer="21"/>
<wire x1="-2.54" y1="-0.635" x2="-3.175" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="-2.54" y1="0.635" x2="-1.905" y2="1.27" width="0.1524" layer="21"/>
<wire x1="-1.905" y1="1.27" x2="-0.635" y2="1.27" width="0.1524" layer="21"/>
<wire x1="-0.635" y1="1.27" x2="0" y2="0.635" width="0.1524" layer="21"/>
<wire x1="0" y1="-0.635" x2="-0.635" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="-0.635" y1="-1.27" x2="-1.905" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="-1.905" y1="-1.27" x2="-2.54" y2="-0.635" width="0.1524" layer="21"/>
<wire x1="-5.08" y1="0.635" x2="-5.08" y2="-0.635" width="0.1524" layer="21"/>
<wire x1="-4.445" y1="1.27" x2="-5.08" y2="0.635" width="0.1524" layer="21"/>
<wire x1="-5.08" y1="-0.635" x2="-4.445" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="-3.175" y1="-1.27" x2="-4.445" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="0" y1="0.635" x2="0.635" y2="1.27" width="0.1524" layer="21"/>
<wire x1="0.635" y1="1.27" x2="1.905" y2="1.27" width="0.1524" layer="21"/>
<wire x1="1.905" y1="1.27" x2="2.54" y2="0.635" width="0.1524" layer="21"/>
<wire x1="2.54" y1="-0.635" x2="1.905" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="1.905" y1="-1.27" x2="0.635" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="0.635" y1="-1.27" x2="0" y2="-0.635" width="0.1524" layer="21"/>
<wire x1="3.175" y1="1.27" x2="4.445" y2="1.27" width="0.1524" layer="21"/>
<wire x1="4.445" y1="1.27" x2="5.08" y2="0.635" width="0.1524" layer="21"/>
<wire x1="5.08" y1="0.635" x2="5.08" y2="-0.635" width="0.1524" layer="21"/>
<wire x1="5.08" y1="-0.635" x2="4.445" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="3.175" y1="1.27" x2="2.54" y2="0.635" width="0.1524" layer="21"/>
<wire x1="2.54" y1="-0.635" x2="3.175" y2="-1.27" width="0.1524" layer="21"/>
<wire x1="4.445" y1="-1.27" x2="3.175" y2="-1.27" width="0.1524" layer="21"/>
<pad name="1" x="-3.81" y="0" drill="1.016" shape="long" rot="R90"/>
<pad name="2" x="-1.27" y="0" drill="1.016" shape="long" rot="R90"/>
<pad name="3" x="1.27" y="0" drill="1.016" shape="long" rot="R90"/>
<pad name="4" x="3.81" y="0" drill="1.016" shape="long" rot="R90"/>
<text x="-5.08" y="1.651" size="1.27" layer="25" ratio="10">&gt;NAME</text>
<text x="-6.223" y="-0.635" size="1.27" layer="21" ratio="10">1</text>
<text x="0.635" y="1.651" size="1.27" layer="27" ratio="10">&gt;VALUE</text>
<text x="5.334" y="-0.635" size="1.27" layer="21" ratio="10">4</text>
<rectangle x1="-1.524" y1="-0.254" x2="-1.016" y2="0.254" layer="51"/>
<rectangle x1="-4.064" y1="-0.254" x2="-3.556" y2="0.254" layer="51"/>
<rectangle x1="1.016" y1="-0.254" x2="1.524" y2="0.254" layer="51"/>
<rectangle x1="3.556" y1="-0.254" x2="4.064" y2="0.254" layer="51"/>
</package>
</packages>
<symbols>
<symbol name="MA04-1">
<wire x1="3.81" y1="-7.62" x2="-1.27" y2="-7.62" width="0.4064" layer="94"/>
<wire x1="1.27" y1="0" x2="2.54" y2="0" width="0.6096" layer="94"/>
<wire x1="1.27" y1="-2.54" x2="2.54" y2="-2.54" width="0.6096" layer="94"/>
<wire x1="1.27" y1="-5.08" x2="2.54" y2="-5.08" width="0.6096" layer="94"/>
<wire x1="-1.27" y1="5.08" x2="-1.27" y2="-7.62" width="0.4064" layer="94"/>
<wire x1="3.81" y1="-7.62" x2="3.81" y2="5.08" width="0.4064" layer="94"/>
<wire x1="-1.27" y1="5.08" x2="3.81" y2="5.08" width="0.4064" layer="94"/>
<wire x1="1.27" y1="2.54" x2="2.54" y2="2.54" width="0.6096" layer="94"/>
<text x="-1.27" y="-10.16" size="1.778" layer="96">&gt;VALUE</text>
<text x="-1.27" y="5.842" size="1.778" layer="95">&gt;NAME</text>
<pin name="1" x="7.62" y="-5.08" visible="pad" length="middle" direction="pas" swaplevel="1" rot="R180"/>
<pin name="2" x="7.62" y="-2.54" visible="pad" length="middle" direction="pas" swaplevel="1" rot="R180"/>
<pin name="3" x="7.62" y="0" visible="pad" length="middle" direction="pas" swaplevel="1" rot="R180"/>
<pin name="4" x="7.62" y="2.54" visible="pad" length="middle" direction="pas" swaplevel="1" rot="R180"/>
</symbol>
</symbols>
<devicesets>
<deviceset name="MA04-1" prefix="SV" uservalue="yes">
<description>&lt;b&gt;PIN HEADER&lt;/b&gt;</description>
<gates>
<gate name="1" symbol="MA04-1" x="0" y="0"/>
</gates>
<devices>
<device name="" package="MA04-1">
<connects>
<connect gate="1" pin="1" pad="1"/>
<connect gate="1" pin="2" pad="2"/>
<connect gate="1" pin="3" pad="3"/>
<connect gate="1" pin="4" pad="4"/>
</connects>
<technologies>
<technology name="">
<attribute name="MF" value="" constant="no"/>
<attribute name="MPN" value="" constant="no"/>
<attribute name="OC_FARNELL" value="unknown" constant="no"/>
<attribute name="OC_NEWARK" value="unknown" constant="no"/>
</technology>
</technologies>
</device>
</devices>
</deviceset>
</devicesets>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
<classes>
<class number="0" name="default" width="0" drill="0">
</class>
</classes>
<parts>
<part name="PCB1" library="E14_Arduino_revB" deviceset="ARDUINO_MICRO" device=""/>
<part name="LD" library="con-lstb" deviceset="MA04-1" device=""/>
<part name="RD" library="con-lstb" deviceset="MA04-1" device=""/>
<part name="LK" library="con-lstb" deviceset="MA04-1" device=""/>
<part name="RK" library="con-lstb" deviceset="MA04-1" device=""/>
</parts>
<sheets>
<sheet>
<plain>
</plain>
<instances>
<instance part="PCB1" gate="G$1" x="63.5" y="68.58"/>
<instance part="LD" gate="1" x="38.1" y="40.64"/>
<instance part="RD" gate="1" x="38.1" y="25.4"/>
<instance part="LK" gate="1" x="38.1" y="10.16"/>
<instance part="RK" gate="1" x="38.1" y="-5.08"/>
</instances>
<busses>
</busses>
<nets>
<net name="N$1" class="0">
<segment>
<pinref part="LD" gate="1" pin="1"/>
<pinref part="PCB1" gate="G$1" pin="A0"/>
<wire x1="45.72" y1="35.56" x2="53.34" y2="35.56" width="0.1524" layer="91"/>
<wire x1="53.34" y1="35.56" x2="53.34" y2="50.8" width="0.1524" layer="91"/>
</segment>
</net>
<net name="N$2" class="0">
<segment>
<pinref part="PCB1" gate="G$1" pin="A1"/>
<wire x1="55.88" y1="50.8" x2="55.88" y2="20.32" width="0.1524" layer="91"/>
<pinref part="RD" gate="1" pin="1"/>
<wire x1="55.88" y1="20.32" x2="45.72" y2="20.32" width="0.1524" layer="91"/>
</segment>
</net>
<net name="N$3" class="0">
<segment>
<pinref part="LK" gate="1" pin="1"/>
<pinref part="PCB1" gate="G$1" pin="A2"/>
<wire x1="45.72" y1="5.08" x2="58.42" y2="5.08" width="0.1524" layer="91"/>
<wire x1="58.42" y1="5.08" x2="58.42" y2="50.8" width="0.1524" layer="91"/>
</segment>
</net>
<net name="N$4" class="0">
<segment>
<pinref part="PCB1" gate="G$1" pin="A3"/>
<wire x1="60.96" y1="50.8" x2="60.96" y2="-10.16" width="0.1524" layer="91"/>
<pinref part="RK" gate="1" pin="1"/>
<wire x1="60.96" y1="-10.16" x2="45.72" y2="-10.16" width="0.1524" layer="91"/>
</segment>
</net>
<net name="N$5" class="0">
<segment>
<pinref part="LD" gate="1" pin="2"/>
<wire x1="45.72" y1="38.1" x2="50.8" y2="38.1" width="0.1524" layer="91"/>
<wire x1="50.8" y1="38.1" x2="50.8" y2="22.86" width="0.1524" layer="91"/>
<pinref part="RD" gate="1" pin="2"/>
<wire x1="50.8" y1="22.86" x2="45.72" y2="22.86" width="0.1524" layer="91"/>
<wire x1="50.8" y1="22.86" x2="50.8" y2="7.62" width="0.1524" layer="91"/>
<pinref part="LK" gate="1" pin="2"/>
<wire x1="50.8" y1="7.62" x2="45.72" y2="7.62" width="0.1524" layer="91"/>
<pinref part="RK" gate="1" pin="2"/>
<wire x1="45.72" y1="-7.62" x2="50.8" y2="-7.62" width="0.1524" layer="91"/>
<wire x1="50.8" y1="-7.62" x2="50.8" y2="7.62" width="0.1524" layer="91"/>
<pinref part="PCB1" gate="G$1" pin="GND."/>
<wire x1="78.74" y1="50.8" x2="78.74" y2="38.1" width="0.1524" layer="91"/>
<wire x1="50.8" y1="38.1" x2="78.74" y2="38.1" width="0.1524" layer="91"/>
</segment>
</net>
<net name="N$6" class="0">
<segment>
<pinref part="LD" gate="1" pin="3"/>
<wire x1="45.72" y1="40.64" x2="48.26" y2="40.64" width="0.1524" layer="91"/>
<wire x1="48.26" y1="40.64" x2="48.26" y2="25.4" width="0.1524" layer="91"/>
<pinref part="RD" gate="1" pin="3"/>
<wire x1="45.72" y1="25.4" x2="48.26" y2="25.4" width="0.1524" layer="91"/>
<wire x1="48.26" y1="25.4" x2="48.26" y2="10.16" width="0.1524" layer="91"/>
<pinref part="LK" gate="1" pin="3"/>
<wire x1="45.72" y1="10.16" x2="48.26" y2="10.16" width="0.1524" layer="91"/>
<wire x1="48.26" y1="10.16" x2="48.26" y2="-5.08" width="0.1524" layer="91"/>
<pinref part="RK" gate="1" pin="3"/>
<wire x1="48.26" y1="-5.08" x2="45.72" y2="-5.08" width="0.1524" layer="91"/>
<pinref part="PCB1" gate="G$1" pin="+5V"/>
<wire x1="73.66" y1="50.8" x2="73.66" y2="40.64" width="0.1524" layer="91"/>
<wire x1="73.66" y1="40.64" x2="48.26" y2="40.64" width="0.1524" layer="91"/>
</segment>
</net>
</nets>
</sheet>
</sheets>
</schematic>
</drawing>
<compatibility>
<note version="6.3" minversion="6.2.2" severity="warning">
Since Version 6.2.2 text objects can contain more than one line,
which will not be processed correctly with this version.
</note>
</compatibility>
</eagle>

137
README.md
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@ -1,136 +1,57 @@
# Sanro - Arduino
（このREADME.mdは日本語訳版があります、README_JP.mdをご覧ください、訳は完璧には程遠いですが）
Hardware program of the game Taiko Sanro.
# Taiko Drum Controller - Arduino
Open-source hardware program to make your own Taiko no Tatsujin PC controller.
## What is This Program
## About this Project
Music game fans from East Asia countries are most probable to know a famous game called Taiko No Tatsujin ([太鼓の達人](http://taiko-ch.net/)), developed by [Bandai Namco Entertainment](http://bandainamcoent.co.jp/).
This project aims to help you develop your own **hardware taiko** at home.
This open-source program aims to help you develop your own **hardware taiko** at home, just like how you play taiko in arcade halls.
*This program is for personal and non-commercial use only.*
*This program is for personal and non-commercial use only. You may design your own taiko and have fun, but you may NOT distribute your product to the public.*
## What You Need
## Features
1. An Arduino Micro or Leonardo microcontroller (other compatible boards might work, but you need to verify that they support keyboard emulation);
* **Full support for the PC game Taiko-san Jiro (太鼓さん次郎).** Actually, any app/game/emulator using keyboards as input is supported.
* **Force-sensitive.** I am also developing a new open-source game called Taiko Sanro that can support this feature.
* **Supports dense inputs such as rolling.**
2. 4 Piezoelectric sensors;
*In one word, your taiko will perform exactly the same as the arcade version if you configure the program well enough! :D*
3. Necessary electronic components (breadboards, resistors, LEDs, jumper wires, etc.);
## Prerequisites
4. Wood planks and cutting tools if you need to make your drum from scratch. If you have a aftermarket taiko or a Big Power Lv. 5 drum, you can use them directly.
Because this is a DIY project, you should have some basic electronic engineering knowledge about connecting microprocessors with jumper wires on a breadboard. **Soldering techniques, however, are NOT required.**
## Steps to Make the Controller
## Getting Started
1. Make the drum and firmly glue the 4 piezoelectric sensors to the drum. Refer to the image for preferred locations of the sensors.
It might take you a few days to assembly and configure your own taiko device. The microprocessor chips are cheap, though, you can buy them from wherever you want.
![Controller scheme](./images/piezo_locations.png)
### Preparation
2. Connect the piezoelectric sensors and other components to the controller as follows (the polarity of the piezoelectric sensors don't matter);
Almost all of these things have alternatives, now I will show you what I used:
![Controller scheme](./images/scheme.png)
* [Arduino Micro](http://i.imgur.com/lXqnpJ9.jpg) module x 1
* [KEYES K-036](http://i.imgur.com/gUWnUCc.png) microphone module x 4
* Breadboard x 1
* A few jumper wires
* Micro USB cable x 1
* [Arduino IDE](https://www.arduino.cc/en/Main/Software)
3. Flash the firmware to the board.
And miscellaneous stuffs like:
You may need to fine-tune some parameters like `SAMPLE_CACHE_LENGTH`, `HIT_THRES`, `RESET_THRES`, and `sensitivity`. See the following section for details.
* Thick wood plank x 4, best to be [shaped like this](http://i.imgur.com/va20eVn.jpg)
* Foamed plastics to connect and fixate the wood
* Superglue
* Other electronical tools like screw drivers and multimeters, etc.
4. Have fun!
A few things to note:
## Tuning the Parameters
1. Any Arduino modules with ATmega32u4 chips or Due and Zero boards are supported. Arduino Micro is the cheapest one, though.
2. Using a breadboard is a low-cost option, but it is not the best/stablest choice. There is a PCB blueprint that allows you to print the integrated board and solder up. For details, please see "Making the PCB" part below.
3. You can also design and build your own microphones modules, just make sure you know how to connect them to your Arduino module.
4. Thick, solid, dense and heavy wood is the best choice, while plywood, particleboard and medium-density fiberboard (MDF) are fragile at their edges and can be easily damaged. For better experience, you should cut the planks with the shapes shown in [the picture](http://i.imgur.com/va20eVn.jpg). If you don't have the cutting tools and want it easier, just prepare 4 planks.
1. Hit and reset threshold
### Connecting the Parts
Set `DEBUG 1` (this disables the keyboard output and sends signal values from the serial port), flash the firmware, roll on one of the 4 areas of the drum, and visualize the graph from the output of the serial monitor. The hit threshold should be smaller than your heaviest hit on the drum, and the reset threshold should be greater than the "cave" between roll hits. The reset value should also below the hit value.
The scheme is quite simple. You don't even need any extra resistors or capacitors. **All you need are jumper wires.**
Repeat the process for the rest 3 areas and find the best one that fits all.
Each microphone module has 4 pins, and we only need 3 of them (`A0`, `+`, and `G`). Connect their `A0` outputs to Arduino Micro's `A0`~`A3` inputs, then connect their `+` pins together with module's `5V` pin, then the `G` pins together to the ground. Use the following picture if you have any problems.
![Controller scheme](./images/tune_hit_reset.png)
(Picture to be uploaded)
2. Sampling length
### (Optional) Making the PCB
For maximum runtime speed, the `cache.h` library has been optimized to work with `SAMPLE_CACHE_LENGTH` window sizes of powers of 2. That means 2, 8, 16, and 32, etc. Practically 16 is the best value for Arduino, but if you have a powerful microcontroller that samples the input at the speed of at least 4000Hz or more, you can change the value to 32 for a smoother (in other words, less noisy) curve.
To make the PCB, you can either DIY or ask local PCB manufacturer for help. If you choose DIY, you should prepare a few more things, including:
3. Sensitivities
* 2.2 x 1.6 inches Empty PCB x 1
* Thermal transfer paper x 1
* Laser printer x 1
* Standard 4-pin header x 4
* Thermal transfer machine (or clothes iron)
* Etchant
* Soldering tools
Not all piezoelectric sensors are the same, and due to installation errors, the captured signals from the 4 sensors may vary significantly. The sensitivity values are multipliers to normalize the differences. In the following example, the right-don area generates a much higher value than the rest 3, so you can adjust `sensitivity` to `{1.0, 1.0, 0.5, 1.0}` to eliminate the issue.
Detailed process to make the PCB is totally off-topic, and you may need [this video](https://www.youtube.com/watch?v=mv7Y0A9YeUc) to help you. I have included the required printable board file `sanro.eps` in the `Eagle/sanro-arduino` folder. You can also download the scheme and board files and edit them by yourself with the [Eagle Software](http://www.cadsoftusa.com/download-eagle/).
![Controller scheme](./images/tune_sensitivities.png)
### Uploading the Program to the Board
1. Download and install [Arduino IDE](https://www.arduino.cc/en/Main/Software).
2. Create a folder and put the source files (`sanro.ino` and `cache.h`) into it.
3. Connect your Arduino Micro to your computer with a USB cable. The driver installation should be automatic, but if you have any questions about it, [check this official guide](https://www.arduino.cc/en/Guide/ArduinoLeonardoMicro#toc8).
4. Open the `sanro` project in Arduino IDE.
5. Select "Board" - "Arduino/Genuino Micro" from the menu.
6. Compile and upload the program.
## Configuration
***WARNING: Because of the deviations between the microphones and the installation of the planks, you will spend much time adjusting the hardware and the parameters in the program. Be patient, there are lots of tries-and-errors up ahead.***
### Hardware
Literally there is only 2 things you need to do:
1. Glue each microphone to the wood plank
2. Fixate the wood planks onto the foamed plastics
However, the problem is how you do them. There are some major criteria when doing this job:
* Attach the microphone to the plank as close/tight as possible
* Seal the microphone to isolate it from outside noises
* Don't let the planks contact each other
To accomplish them, you can remove the filter cover of the microphone receiver, then attach the receiver face (the microphones are usually cylindrical, like [the ones that I used in this project](http://i.imgur.com/gUWnUCc.png)) tightly to the surface of the plank, and seal it with superglue. In this way, the soundwave from the plank can be directly transmitted to the microphone, loud and clear. Also, noises and soundwave from nearby planks can be reduced to the minimum.
Also, please note that there is a potentiometer on the KEYES module, which is used to set the quiescent operating point (Q-point) of the microphone. Although I have implemented algorithms to eliminate the bias caused by unequal Q-point of each microphone, **it is better to adjust the potentiometer manually and keep the Q-points at approximately the same level.** To do this, you may need to contact your microphone provider.
### Parameters in the Program
All you need to change is the `LIGHT_THRES` and the `HEAVY_THRES`, according to your microphone configuration.
The codes are short and self-explanatory, and if you need help understanding them, please refer to the "About the Algorithm" part.
(To be completed)
## About the Algorithm
The algorithm in the program is simple, and there are still much more to be optimized. All pull requests are welcomed!
In short, the signal processing job can be divided into 4 calculating steps after acquiring the samples from the analog inputs:
1. Calculate the derivative
2. Calculate the power of the waveform
3. Calculate the convolution of the power
4. Find the peak of the power convolution and compare it with the thresholds to see if there is a light or heavy hit
This picture shows the algorithm in a clearer way:
(Picture to be uploaded)
Step 1 is to elinimate the difference of Q-point, which makes it easier and more accurate to calculate the power of the waveform.
Step 2, calculating the power of the waveform, can also enhance the signal to noise ratio (SNR), which can further eliminate the noises. `LIGHT_THRES` is also used here to cut the low-power noises out.
Step 3 is to "polish" the power curve to make it more like a sequence of hit pulses, which makes it easier to find the power peak.
For Arduino microprocessors, the executing time for each loop is not stable - the processor always executes the instructions as fast as it can. Onece the loop ends, it immediately starts the next loop. This is extremely bad for sampling sounds. Therefore, the program implements a simple sampling frequency control mechanism to restrict the sampling frequency to no more than 1,000Hz.
Note that the installation of the sensors is very critical. You should make sure that the sensors are firmly attached on the wood and located properly.

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32
sanro/cache.h
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@ -14,32 +14,18 @@
template <class T, int L>
class Cache {
public:
Cache ();
void put (T value);
T get (int offset = 0) const;
Cache() { memset(data_, 0, sizeof(data_)); }
inline void put(T value) {
current_ = (current_ + 1) & (L - 1);
data_[current_] = value;
}
inline T get(int offset = 0) const {
return data_[(current_ + offset) & (L - 1)];
}
private:
T data_ [L];
T data_[L];
int current_ = 0;
};
template <class T, int L>
Cache <T, L>::Cache () {
for (int i = 0; i < L; i++) {
data_ [i] = 0;
}
}
template <class T, int L>
void Cache <T, L>::put (T value) {
current_ = (current_ + 1) % L;
data_ [current_] = value;
}
template <class T, int L>
T Cache <T, L>::get (int offset) const {
int index = (current_ + offset) % L;
return data_ [index];
}
#endif // CACHE_H

148
sanro/sanro.ino
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@ -1,126 +1,80 @@
/***************************************************************
* *
* Taiko Sanro - Arduino *
* Support Arduino models with ATmega32u4 microprocessors *
* *
* Shiky Chang Chris *
* zhangxunpx@gmail.com wisaly@gmail.com *
* *
***************************************************************/
// Compatibility with Taiko Jiro
#define MODE_JIRO 1
#define MODE_DEBUG 0
#define CHANNELS 4
#define SAMPLE_CACHE_LENGTH 16 // Must be power of 2 (8, 16, etc.); See cache.h for implementation
#define HIT_THRES 750 // The thresholds are also dependent on SAMPLE_CACHE_LENGTH, if you
#define RESET_THRES 300 // changed SAMPLE_CACHE_LENGTH, you must adjust thresholds here
// Caches for the soundwave and power
#define SAMPLE_CACHE_LENGTH 12
#define POWER_CACHE_LENGTH 3
#define DEBUG 0
// Light and heacy hit thresholds
#define LIGHT_THRES 5000
#define HEAVY_THRES 20000
// Forced sampling frequency
#define FORCED_FREQ 1000
#include <limits.h>
#include <Keyboard.h>
#include "cache.h"
#include <limits.h>
#if MODE_JIRO
#define HEAVY_THRES LONG_MAX
#endif
#include "cache.h"
unsigned long int lastTime;
int channelSample [CHANNELS];
int lastChannelSample [CHANNELS];
Cache <int, SAMPLE_CACHE_LENGTH> sampleCache [CHANNELS];
Cache<int, SAMPLE_CACHE_LENGTH> inputWindow[CHANNELS];
unsigned long power[CHANNELS];
unsigned long lastPower[CHANNELS];
long int power [CHANNELS];
Cache <long int, POWER_CACHE_LENGTH> powerCache [CHANNELS];
bool triggered;
unsigned long triggeredTime[CHANNELS];
bool triggered [CHANNELS];
const byte inPins[] = {A0, A1, A2, A3}; // L don, L kat, R don, R kat
const byte outPins[] = {5, 6, 7, 8}; // LED visualization (optional)
const char outKeys[] = {'f', 'd', 'j', 'k'}; // L don, L kat, R don, R kat
int pins[] = {A0, A1, A2, A3}; // L don, R don, L kat, R kat
char lightKeys[] = {'g', 'h', 'f', 'j'};
char heavyKeys[] = {'t', 'y', 'r', 'u'};
float sensitivity[] = {1.0, 1.0, 1.0, 1.0};
short maxIndex;
float maxPower;
void setup() {
Serial.begin (9600);
Keyboard.begin ();
analogReference (DEFAULT);
for (short int i = 0; i < CHANNELS; i++) {
power [i] = 0;
lastChannelSample [i] = 0;
triggered [i] = false;
Serial.begin(115200);
Keyboard.begin();
analogReference(DEFAULT);
for (byte i = 0; i < CHANNELS; i++) {
power[i] = 0;
lastPower[i] = 0;
triggered = false;
}
lastTime = 0;
maxIndex = -1;
maxPower = 0;
}
void loop() {
for (short int i = 0; i < CHANNELS; i++) {
channelSample[i] = analogRead (pins [i]);
sampleCache [i].put (channelSample [i] - lastChannelSample [i]);
long int tempInt;
tempInt = sampleCache [i].get (1);
power [i] -= tempInt * tempInt;
tempInt = sampleCache [i].get ();
power [i] += tempInt * tempInt;
if (power [i] < LIGHT_THRES) {
power [i] = 0;
if (maxIndex != -1 && lastPower[maxIndex] < RESET_THRES) {
triggered = false;
digitalWrite(outPins[maxIndex], LOW);
maxIndex = -1;
maxPower = 0;
}
powerCache [i].put (power [i]);
lastChannelSample [i] = channelSample [i];
if (powerCache [i].get (1) == 0) {
triggered [i] = false;
}
for (byte i = 0; i < CHANNELS; i++) {
if (!triggered [i]) {
for (short int j = 0; j < POWER_CACHE_LENGTH - 1; j++) {
if (powerCache [i].get (j - 1) >= powerCache [i].get (j)) {
break;
} else if (powerCache [i].get (1) >= HEAVY_THRES) {
triggered [i] = true;
Keyboard.print (heavyKeys [i]);
} else if (powerCache [i].get (1) >= LIGHT_THRES) {
triggered [i] = true;
Keyboard.print (lightKeys [i]);
}
}
}
inputWindow[i].put(analogRead(inPins[i]));
power[i] = sensitivity[i] * (power[i] - inputWindow[i].get(1) + inputWindow[i].get());
#if MODE_DEBUG
Serial.print (power [i]);
Serial.print ("\t");
if (lastPower[i] > maxPower && power[i] < lastPower[i]) {
maxPower = lastPower[i];
maxIndex = i;
}
lastPower[i] = power[i];
#if DEBUG
Serial.print(power[i]);
Serial.print(" ");
#endif
// End of each channel
}
#if MODE_DEBUG
Serial.print (50000);
Serial.print ("\t");
Serial.print (0);
Serial.print ("\t");
Serial.println ("");
if (!triggered && maxPower >= HIT_THRES) {
triggered = true;
digitalWrite(outPins[maxIndex], HIGH);
#if !DEBUG
Keyboard.print(outKeys[maxIndex]);
#endif
// Force the sample frequency to be less than 1000Hz
unsigned int frameTime = micros () - lastTime;
lastTime = micros ();
if (frameTime < FORCED_FREQ) {
delayMicroseconds (FORCED_FREQ - frameTime);
} else {
// Performance bottleneck;
Serial.print ("Exception: forced frequency is too high for the microprocessor to catch up.");
}
#if DEBUG
Serial.print("\n");
#endif
}