// 直插电阻
// include <NopSCADlib/lib.scad>
extrusion_width = is_undef($extrusion_width) ? 0.5 : $extrusion_width; // filament width when printing
$fa = $fa == 12 ? 6 : $fa; // Defaults for printing
//$fs = $fs == 2 ? extrusion_width / 2 : $fs;
fa = is_undef($vitamin_fa) ? 6 : $vitamin_fa; // Used for drawing vitamins, rather than printing.
fs = is_undef($vitamin_fs) ? 0.25 : $vitamin_fs;
eps = 1/128; // small fudge factor to stop CSG barfing on coincident faces.
fn = 32;
function inch(x) = x * 25.4;
function sqr(x) = x * x; //! Returns the square of `x`
module translate_z(z) //! Shortcut for Z only translations
translate([0, 0, z]) children();
module vflip(flip=true) //! Invert children by doing a 180° flip around the X axis
rotate([flip ? 180 : 0, 0, 0]) children();
module solder_meniscus(ir = 0.3, r = 1, h = 0.7) { //! Draw a solder meniscus
$fn = fn;
color("silver") rotate_extrude()
difference() {
square([r, h]);
translate([r + eps, h + eps])
ellipse(r - ir + eps, h);
}
}
module solder(ir = 0.3) { //! Maybe add solder meniscus if $solder is set
if(!is_undef($solder))
vflip()
translate_z($solder.z)
solder_meniscus(ir = ir, r = $solder.x);
}
module wire_link(d, l, h = 1, tail = 3, sleeve = false) { //! Draw a wire jumper link. `sleeve` can be a list with the diameter and colour. If `l` is zero then a vertical wire is drawn.
// vitamin(str("wire_link(", d, ", ", l, arg(h, 1, "h"), arg(tail, 3, "tail"), arg(sleeve, false, "sleeve"),
// "): Wire link ", d, "mm x ", l ? str(l / inch(1), "\"") : str(h + tail,"mm"), sleeve ? str(" with ", sleeve[1], " sleeving") : ""));
r = d;
$fn = fn;
color("silver")
if(l) {
for(side = [-1, 1]) {
translate([side * l / 2, 0, -tail])
cylinder(d = d, h = tail + h - r);
translate([side * (l / 2 - r), 0, h - r])
rotate([90, 0, side * 90 - 90])
rotate_extrude(angle = 90, $fn = fn * 2)
translate([r, 0])
circle(d = d, $fn = fn);
translate([side * l /2, 0])
if(tail > 1)
solder(ir = d / 2);
else
if(!is_undef($solder))
translate_z(0.1)
solder_meniscus(ir = d / 2, r = $solder.x, h = h - r - 0.1);
}
translate_z(h)
rotate([0, -90, 0])
cylinder(d = d, h = l - 2 * r, center = true);
}
else {
translate_z(-tail)
cylinder(d = d, h = tail + h);
solder(ir = d / 2);
}
if(sleeve)
color(sleeve[1])
translate_z(h)
rotate([0, 90, 0])
cylinder(d = sleeve[0], h = l - 2 * r, center = true);
}
module round(r, ir = undef, or = undef) { //! Round a 2D child, single radius or separate inside and outside radii
IR = is_undef(ir) ? r : ir;
OR = is_undef(or) ? r : or;
offset(OR)
offset(-OR -IR)
offset(IR)
children();
}
module not_on_bom(on = false) //! Specify the following child parts are not on the BOM, for example when they are on a PCB that comes assembled
let($on_bom = on)
children();
function ax_res_wattage(type) = type[1]; //! Power rating
function ax_res_length(type) = type[2]; //! Body length
function ax_res_diameter(type)= type[3]; //! Body diameter
function ax_res_end_d(type) = type[4]; //! End cap diameter
function ax_res_end_l(type) = type[5]; //! End cap length
function ax_res_wire(type) = type[6]; //! Wire diameter
function ax_res_colour(type) = type[7]; //! Body colour
module orientate_axial(length, height, pitch, wire_d) { // Orient horizontal or vertical and add the wires
min_pitch = ceil((length + 1) / inch(0.1)) * inch(0.1);
lead_pitch = pitch ? pitch : min_pitch;
if(lead_pitch > min_pitch - eps) {
not_on_bom()
wire_link(wire_d, lead_pitch, height);
translate_z(height)
rotate([0, 90, 0])
children();
}
else {
not_on_bom()
wire_link(wire_d, lead_pitch, length + 0.7 + wire_d);
translate([-pitch / 2, 0, length / 2 + 0.2])
children();
}
}
module ax_res(type, value, tol = 5, pitch = 0) { //! Through hole axial resistor. If `pitch` is zero the minimum is used. If below the minimum the resistor is placed vertical.
// vitamin(str("ax_res(", type[0], ", ", value, arg(tol, 5, "tol"), "): Resistor ", value, " Ohms ", tol, "% ",ax_res_wattage(type), "W"));
wire_d = ax_res_wire(type);
end_d = ax_res_end_d(type);
end_l = ax_res_end_l(type);
body_d = ax_res_diameter(type);
length = ax_res_length(type);
h = end_d / 2;
r = 0.3;
colours = ["gold", "silver", "black", "brown", "red", "orange", "yellow", "green", "blue", "violet", "grey", "white"];
$fs = fs; $fa = fa;
exp = floor(log(value) + eps);
mult = exp - (len(str(value / pow(10, exp - 1))) > 2 ? 2 : 1);
digits = str(value / pow(10, mult));
bands = [
for(d = digits)
colours[ord(d) - ord("0") + 2],
colours[mult + 2],
tol == 1 ? "brown" :
tol == 2 ? "red" :
tol == 5 ? "gold" :
tol == 10 ? "silver" : "error"
];
module profile(o = 0)
intersection() {
offset(o) round(r)
union(){
translate([0, -length / 2])
square([body_d / 2, length]);
for(end = [-1, 1])
hull() {
translate([0, end * (length - end_l) / 2 - end_l / 2])
square([end_d / 2, end_l]);
translate([0, end * length / 2])
square([wire_d, 2 * r], center = true);
}
translate([-5, 0])
square([10 + wire_d, length + 4 * r], center = true);
}
translate([0, -50])
square([50, 100]);
}
orientate_axial(length, h, pitch, wire_d) {
color(ax_res_colour(type))
rotate_extrude()
profile();
for(i = [0 : len(bands) - 1])
color(bands[i])
rotate_extrude()
intersection() {
profile(eps);
translate([0, length / 2 - end_l / 2 - i * (length - end_l) / (len(bands) - 1)])
square([end_d + 1, (length - end_l) / len(bands) / 2], center = true);
}
}
}
//vitamins/axials.scad
// res1_8 = ["res1_8", 0.125, 3.3, 1.35, 1.7, 1, 0.33, "#FAE3AC"];
// res1_4 = ["res1_4", 0.25, 5.7, 1.85, 2.3, 1.5, 0.55, "#FAE3AC"];
res1_2 = ["res1_2", 0.5, 10, 3.25, 3.7, 1.8, 0.70, "#FAE3AC"];
// ax_resistors = [res1_8, res1_4, res1_2];
ax_res(res1_2, 20000, 1, inch(0.2));
