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/*
Open freecad, select Workbench OpenSCAD
import file, select group, save as freecad file,
close, open freecad file and export to VRML 2.0 (wrl file)
https://www.freecadweb.org/wiki/Import_OpenSCAD_code
*/
n_pins=7; // number of pins
pin_pitch=2.54; // pin pitch
pin_thick=0.7;
// 0.96" COLOR OLED SSD1331
body=[27.2,30.7,2]; // PCB dimensions of the display
height=6; // body above z axis
hole_d=2.5; // hole diameter
hole_edge=2; // hole center to body edge
color_body=[0.03,0.03,0.15];
color_rgbw=[[1,0,0],[0,1,0],[0,0,1],[1,1,1]];
// pin protrusions
pin_above=1; // above the display
pin_below=2; // below the height
color_pin="white";
font = "Liberation Sans";
letter_size = pitch/2;
letter_height = pitch/16;
color_letter="white";
enable_letter=0; // letters don't work after exporting to VRML
module letter(l,scale=1)
{
// Use linear_extrude() to make the letters 3D objects as they
// are only 2D shapes when only using text()
linear_extrude(height = letter_height*scale)
{
text(l, size = letter_size*scale, font = font, halign = "center",
valign = "center", $fn = 16);
}
}
module inscription(scale=1)
{
translate([
(0-n_switches/2+0.5)*pitch,
body[1]/2-letter_size,
body[2]/2-letter_height*scale])
letter("ON");
for(i = [0:n_switches-1])
{
translate([
(i-n_switches/2+0.5)*pitch,
-body[1]/2+letter_size,
body[2]/2-letter_height*scale])
letter(chr(48+(i+1)%10));
}
}
module oled()
{
translate([0,(body[1]/2-pin_pitch*0.75),-body[2]/2+height])
difference()
{
color(color_body)
cube(body, center=true);
union()
{
// color stripes display simulation
for(i=[0:len(color_rgbw)-1])
translate([0,-body[1]/8*(i-len(color_rgbw)/2+0.5),body[2]/2])
color(color_rgbw[i])
cube([body[0]*0.9,body[1]/8,0.1],center=true);
// holes
for(i=[-1:2:1])
for(j=[-1:2:1])
translate(
[
i*(body[0]/2-hole_edge),
j*(body[1]/2-hole_edge),
0
])
cylinder(d=hole_d,h=body[2]+0.1,$fn=24,center=true);
}
}
// the pins
for(i = [0:n_pins-1])
{
// pins
translate([(i-n_pins/2+0.5)*pin_pitch,0,-body[2]/2*0+(height+pin_above+pin_below)/2-pin_below])
color(color_pin)
cube([pin_thick,pin_thick,height+pin_above+pin_below],center=true);
}
}
// scale(1/2.54) // required scale for KiCAD VRML file dipswitch_smd.wrl
oled();