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Single 7_segment objects can now have multiple digits.

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This is deduced from the digit size compared to the overall size.
The decimal point is now suppressed if there are not enough pins.
Added 02531A and 02352A 3 digit displays.
This commit is contained in:
Chris Palmer
2021-10-26 12:24:59 +01:00
parent 09bce09a85
commit f5528c5a9a
5 changed files with 55 additions and 37 deletions
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5
readme.md
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@@ -52,7 +52,10 @@ A list of changes classified as breaking, additions or fixes is maintained in [C
---
<a name="7_segments"></a>
## 7_segments
7 Segment displays
7 Segment displays.
Can be single digits stacked side by side or can be multiple digits in one unit. This is determined by the overall width compared to the width of a digit.
Presence of a decimal point is determined by the number of pins. Its position is determined by a heuristic.
[vitamins/7_segments.scad](vitamins/7_segments.scad) Object definitions.

6
tests/7_segments.scad
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@@ -21,9 +21,11 @@ use <../utils/layout.scad>
include <../vitamins/7_segments.scad>
function digits(s) = 7_segment_digits(s) < 2 ? 2 : 1;
module 7_segments()
layout([for(s = 7_segments) 7_segment_size(s).x * 2], 5) let(s = 7_segments[$i])
7_segment_digits(s, 2);
layout([for(s = 7_segments) 7_segment_size(s).x * digits(s)], 3) let(s = 7_segments[$i])
7_segment_digits(s, digits(s));
if($preview)
7_segments();

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tests/png/7_segments.png
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77
vitamins/7_segment.scad
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@@ -18,7 +18,10 @@
//
//
//! 7 Segment displays
//! 7 Segment displays.
//!
//! Can be single digits stacked side by side or can be multiple digits in one unit. This is determined by the overall width compared to the width of a digit.
//! Presence of a decimal point is determined by the number of pins. Its position is determined by a heuristic.
//
include <../utils/core/core.scad>
@@ -28,12 +31,20 @@ function 7_segment_digit_size(type) = type[2]; //! Size of the actual digit and
function 7_segment_pins(type) = type[3]; //! [x, y] array of pins
function 7_segment_pin_pitch(type) = type[4]; //! x and y pin pitches and pin diameter
function 7_segment_digits(type) = let(d = 7_segment_digit_size(type)) floor(7_segment_size(type).x / (d.x + d.y * tan(d[3])));
module 7_segment_digit(type, colour = grey(95), pin_length = 6.4) { //! Draw the specified 7 segment digit
size = 7_segment_size(type);
digit = 7_segment_digit_size(type);
pins = 7_segment_pins(type);
pin_pitch = 7_segment_pin_pitch(type);
t = digit[2];
a = digit[3];
digits = 7_segment_digits(type);
pitch = size.x / digits;
has_dp = (pins.x * pins.y) > 7 + digits;
color(grey(95))
linear_extrude(size.z)
square([size.x - 0.1, size.y], center = true);
@@ -43,48 +54,48 @@ module 7_segment_digit(type, colour = grey(95), pin_length = 6.4) { //! Draw the
cube([size.x - 0.1, size.y, eps], center = true);
color(colour)
translate_z(size.z)
linear_extrude(2 * eps) {
t = digit[2];
a = digit[3];
sq = [digit.x - 2 * t, (digit.y - 3 * t) / 2];
for(i = [0 : digits - 1])
translate([(i - (digits - 1) / 2) * pitch, 0, size.z])
linear_extrude(2 * eps) {
sq = [digit.x - 2 * t, (digit.y - 3 * t) / 2];
multmatrix([ // Skew
[1, tan(a), 0, 0],
[0, 1, 0, 0],
[0, 0, 1, 0],
[0, 0, 0, 1]
])
difference() {
square([digit.x, digit.y], center = true);
multmatrix([ // Skew
[1, tan(a), 0, 0],
[0, 1, 0, 0],
[0, 0, 1, 0],
[0, 0, 0, 1]
])
difference() {
square([digit.x, digit.y], center = true);
for(y = [-1, 1], x = [-1, 1]) {
translate([0, y * (t + sq.y) / 2])
square(sq, center = true);
for(y = [-1, 1], x = [-1, 1]) {
translate([0, y * (t + sq.y) / 2])
square(sq, center = true);
translate([x * digit.x / 2, y * digit.y / 2])
rotate(-45 * x * y) {
square([10, t], center = true);
translate([x * digit.x / 2, y * digit.y / 2])
rotate(-45 * x * y) {
square([10, t], center = true);
square([t / 5, 10], center = true);
}
square([t / 5, 10], center = true);
}
translate([x * (digit.x - t) / 2, 0])
rotate(45) {
square([t / 5, t * 2], center = true);
translate([x * (digit.x - t) / 2, 0])
rotate(45) {
square([t / 5, t * 2], center = true);
square([t * 2, t / 5], center = true);
square([t * 2, t / 5], center = true);
translate([x * t / 2, -x * t / 2])
square([t, t], center = true);
}
translate([x * t / 2, -x * t / 2])
square([t, t], center = true);
}
}
}
r = 1.25 * t / 2;
if(has_dp)
translate([max(digit.x / 2 + digit.y / 2 * tan(a) - r, digit.x / 2 - digit.y /2 * tan(a) + r * 1.25), -digit.y / 2 + r])
circle(r);
}
r = 1.25 * t / 2;
translate([digit.x / 2 - r + digit.y / 2 * tan(a), -digit.y / 2 + r])
circle(r);
}
color(silver)
translate_z(-pin_length)

4
vitamins/7_segments.scad
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@@ -21,8 +21,10 @@
//! 7 Segment displays
//
02531A = ["02531A", [15.0, 8, 4.0], [3.5, 6.2, 0.7, 5], [5, 2], [inch(0.1), inch(0.1), 0.45]];
02352A = ["02352A", [15.0, 8, 4.0], [3.5, 6.2, 0.6, 5], [6, 2], [inch(0.1), 5.52, 0.45]];
WT5011BSR = ["WT5011BSR", [12.7, 19, 8.2], [7.2, 12.7, 1.2, 10], [5, 2], [inch(0.1), inch(0.6), 0.4]];
7_segments = [ WT5011BSR ];
7_segments = [02531A, 02352A, WT5011BSR];
use <7_segment.scad>