OpenSCAD source code: Upright mount for WS2812 array test fixture

WS2812 LED Array Test Fixture.scad

// LED Test Fixture
// Ed Nisley KE4ZNU - February 2017

ClampFlange = true;

Channel = false;

//- Extrusion parameters - must match reality!

ThreadThick = 0.25;
ThreadWidth = 0.40;

function IntegerMultiple(Size,Unit) = Unit * ceil(Size / Unit);

Protrusion = 0.1;

HoleWindage = 0.2;

//- Screw sizes

ID = 0;
OD = 1;
LENGTH = 2;

Insert = [2.8,3.5,4.0];     // M2 threaded insert
ScrewOD = 2.0;
WasherOD = 5.0;

//- Component sizes

PCBSize = [18.0,43.5,1.6];                        // microcontroller PCB

PCBClear = 2*[ThreadWidth,ThreadWidth,0];         // clearance around board

PCBShelf = [ThreadWidth,ThreadWidth,0];           // shelf under perimeter

PCBCavity = PCBSize - PCBShelf + [0,0,2.5];       // support shelf around bottom parts

LEDPanel = [70,40,4.0];                           // lying flat, LEDs upward
LEDWire = [LEDPanel[0],LEDPanel[1] + 2*5.0,2.0];  // power wires along sides

Diffuser = [LEDPanel[0],LEDPanel[1] + 2*4.0,3.5];
echo(str("Diffuser panel: ",Diffuser));

WallThick = 8.0;
BaseThick = 3*ThreadThick + Insert[LENGTH] + PCBCavity[2];

Block = [3*WallThick + PCBSize[0] + LEDPanel[2] + Diffuser[2],
         2*WallThick + IntegerMultiple(max(PCBSize[1],LEDWire[1]),5),
         BaseThick + LEDPanel[0]];

echo(str("Block: ",Block));

CornerRadius = 5.0;
NumSides = 4*5;

//- Adjust hole diameter to make the size come out right

module PolyCyl(Dia,Height,ForceSides=0) {			// based on nophead's polyholes

  Sides = (ForceSides != 0) ? ForceSides : (ceil(Dia) + 2);

  FixDia = Dia / cos(180/Sides);

  cylinder(r=(FixDia + HoleWindage)/2,h=Height,$fn=Sides);
}

//- Build it

difference() {

  hull()                                                // main block with rounded corners
    for (i=[-1,1], j=[-1,1])
      translate([i*(Block[0]/2 - CornerRadius),j*(Block[1]/2 - CornerRadius),,0])
        cylinder(r=CornerRadius,h=Block[2],$fn=NumSides);

  translate([2*WallThick + PCBSize[0] - Block[0],
              0,
              (Block[2]/2 + BaseThick)])
    cube(Block + [0,2*Protrusion,0],center=true);                   // cut out over PCB

  translate([WallThick + (PCBSize + PCBClear)[0]/2 - Block[0]/2,
              0,
              0]) {
    translate([0,0,(BaseThick + (Protrusion - PCBSize[2])/2)])
      cube(PCBSize + PCBClear + [0,0,Protrusion],center=true);      // PCB recess

    translate([0,0,(BaseThick + (Protrusion - PCBCavity[2])/2)])
      cube(PCBCavity + [0,0,Protrusion],center=true);               // cavity under PCB

    translate([PCBSize[0]/2 + WallThick/2 - Protrusion/2,PCBSize[1]/2 - 15/2,BaseThick - PCBCavity[2]/2 + Protrusion/2])
      cube([WallThick + PCBShelf[0] + Protrusion,
            15,PCBCavity[2] + Protrusion],center=true);   // wiring cutout

  for (i=[-1,1], j=[-1,1])                                          // screw inserts
    translate([i*(PCBSize[0] + ScrewOD)/2,j*(PCBSize[1] + ScrewOD)/2,-Protrusion])
      rotate(180/(2*6))
        PolyCyl(Insert[OD],BaseThick + 2*Protrusion,6);
  }

  resize([2*Block[0],0,LEDPanel[0] + Protrusion])                   // LED panel outline
    translate([0,0,BaseThick])
      rotate([0,-90,0])
        translate([(LEDPanel[0] + Protrusion)/2,0,0])
          cube(LEDPanel + [Protrusion,0,0],center=true);

  translate([-Block[0]/2 + 2*WallThick + PCBSize[0] + LEDWire[2]/2 + 5*ThreadWidth,
        0,BaseThick])                                               // LED wiring recess
    rotate([0,-90,0])
      translate([(LEDWire[0] + Protrusion)/2,0,0])
        cube(LEDWire + [Protrusion,0,0],center=true);


    translate([Block[0]/2 - Diffuser[2]/2 - 5*ThreadWidth,0,BaseThick])   // diffuser
      rotate([0,-90,0])
        translate([(Diffuser[0] + Protrusion)/2,0,0])
          cube(Diffuser + [Protrusion,0,0],center=true);
}

More details on my blog at http://wp.me/poZKh-6xl