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// Anker PowerCore 325 20K V2 Power Bank |
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// Ed Nisley – KE4ZNU |
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// 2024-07 |
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/* [Layout Options] */ |
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Layout = "Show"; // [Show,Build] |
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Part = "Cradle"; // [Cradle,Battery,Pad] |
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/* [Extrusion Parameters] */ |
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ThreadWidth = 0.40; |
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ThreadThick = 0.25; |
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HoleWindage = 0.2; |
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Protrusion = 0.1; |
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//—– |
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// Dimensions |
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/* [Hidden] */ |
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ID = 0; |
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OD = 1; |
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LENGTH = 2; |
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EmbossDepth = 2*ThreadThick + Protrusion; // recess depth + Protrusion beyond surface |
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DebossHeight = EmbossDepth; // text height + Protrusion into part |
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Projection = 10; // stick-out to punch through shell sides & suchlike |
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FadeColor = "Green"; |
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FadeAlpha = 0.25; |
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//—– |
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// Useful routines |
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function IntegerMultiple(Size,Unit) = Unit * ceil(Size / Unit); |
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module PolyCyl(Dia,Height,ForceSides=0) { // based on nophead's polyholes |
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Sides = (ForceSides != 0) ? ForceSides : (ceil(Dia) + 2); |
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FixDia = Dia / cos(180/Sides); |
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cylinder(r=(FixDia + HoleWindage)/2, |
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h=Height, |
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$fn=Sides); |
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} |
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//—– |
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// Battery |
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// Based on Anker PowerCore 325, simplified shapes |
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// Includes port punchouts |
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Battery = [162.0+0.5,81.5+0.5,24.0]; // X=length, Y=max, Z=max |
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module BatteryShape(Jacks = true) { |
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USB = [[Projection,20,12],[Projection,18,10]]; // clearance around USB output jacks |
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USBOffset = [[0,20.0,0],[0,62.5,0]]; // from -Y edge to center of jack, Z centered |
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BatteryRad = 7.0; // corner rounding radius |
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BatterySides = 2*3*4; |
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hull() |
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for (i=[-1,1], j=[-1,1]) |
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translate([i*(Battery.x/2 – BatteryRad), |
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j*(Battery.y/2 – BatteryRad), |
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0]) |
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cylinder(r=BatteryRad,h=Battery.z,$fn=BatterySides,center=true); |
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if (Jacks) |
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for (i=[0,len(USB)-1]) |
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translate([(Battery.x + USB[i].x)/2 – Protrusion,-Battery.y/2 + USBOffset[i].y,0]) |
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cube(USB[i],center=true); |
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} |
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//—– |
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// Battery cradle |
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RackWidth = 90.0; // flat width between rack rails |
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CradleWall = [4.0,4.0,3.0]; // wall thickness |
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CradleRadius = 2.0; // corner rounding |
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CradlePad = 1.0; // cushion on battery bottom |
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BatteryBase = CradleWall.z + CradlePad; // actual bottom surface of battery |
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CradleOA = [Battery.x + 2*CradleWall.x, |
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min((Battery.y + 2*CradleWall.y),RackWidth), |
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BatteryBase + Battery.z/2]; |
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echo(str("Cradle OA: ",CradleOA)); |
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module Cradle() { |
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difference() { |
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hull() |
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for (i=[-1,1], j=[-1,1]) { // box with tidy rounded corners |
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translate([i*(CradleOA.x/2 – CradleRadius), |
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j*(CradleOA.y/2 – CradleRadius), |
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1*(CradleOA.z – CradleRadius)]) |
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sphere(r=CradleRadius,$fn=6); |
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translate([i*(CradleOA.x/2 – CradleRadius), |
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j*(CradleOA.y/2 – CradleRadius), |
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0*(CradleOA.z/2 – CradleRadius)]) |
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cylinder(r=CradleRadius,h=CradleOA.z/2,$fn=6); |
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} |
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translate([0,0,Battery.z/2 + BatteryBase]) // minus the battery |
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minkowski(convexity=3) { // … slightly embiggened |
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BatteryShape(); |
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cube(2*CradlePad,center=true); |
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} |
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translate([0,0,CradleWall.z – ThreadThick + Protrusion/2]) // recess top legend |
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cube([55,20,EmbossDepth],center=true); |
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translate([0,0,(EmbossDepth – Protrusion)/2]) // recess bottom legend |
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cube([70,15,EmbossDepth],center=true); |
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} |
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translate([0,4.0,CradleWall.z – DebossHeight – Protrusion]) |
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linear_extrude(height=DebossHeight,convexity=20) |
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text(text="PowerCore",size=6,spacing=1.20, |
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font="Arial:style:Bold",halign="center",valign="center"); |
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translate([0,-4.0,CradleWall.z – DebossHeight – Protrusion]) |
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linear_extrude(height=DebossHeight,convexity=20) |
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text(text="20K V2",size=6,spacing=1.20, |
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font="Arial:style:Bold",halign="center",valign="center"); |
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linear_extrude(height=DebossHeight,convexity=20) |
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mirror([0,1,0]) |
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text(text="KE4ZNU",size=10,spacing=1.20, |
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font="Arial:style:Bold",halign="center",valign="center"); |
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} |
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//—– |
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// Build things |
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// Layouts for design & tweaking |
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if (Layout == "Show") |
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if (Part == "Battery") |
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BatteryShape(); |
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else if (Part == "Cradle") { |
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Cradle(); |
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translate([0,0,Battery.z/2 + CradleWall.z]) |
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color(FadeColor,FadeAlpha) |
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BatteryShape(); |
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} |
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else if (Part == "Pad") |
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linear_extrude(height=CradlePad) |
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projection(cut=true) |
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BatteryShape(Jacks = false); |
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// Build layouts for top-level parts |
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if (Layout == "Build") { |
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if (Part == "Cradle") |
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Cradle(); |
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if (Part == "Pad") |
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projection(cut=true) |
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BatteryShape(Jacks = false); |
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} |
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The Smell of Molten Projects in the Morning 