Designing buttons turns out to be difficult.

model/button-all.scad

@@ -1,7 +0,0 @@
-include <button.scad>;
-
-cup();
-translate([0, 0, wall]) magnet();
-
-translate([40, 0, 0]) container();
-translate([40, 0, wall]) magnet();

model/button-container.scad

@@ -1,3 +0,0 @@
-include <button.scad>;
-
-translate([0, 0, 0]) container();

model/button-cup.scad

@@ -1,3 +0,0 @@
-include <button.scad>;
-
-cup();

model/button.scad

@@ -1,103 +0,0 @@
-// This is the button on the bottom of the chanter.
-// You put a magnet in the bottom of it,
-// then jam a unipolar linear hall effect sensor in the body,
-// and you have a cheap and reliable way to detect insertion depth.
-
-// Make circles lovely and round
-$fa = 1; $fs = 0.5;
-
-magnet_od = 17.5; // Outside diameter of the magnet you're using
-magnet_id = 7;
-magnet_h = 6; // I use two ceramic magnets stacked together, to increase the field strength
-throw = 15; // How far you can depress the button
-gap = 2; // How much space we need for the gap. OH59E is 1.57mm thick
-wall = 1.6; // Wall depth
-leg_angle = 30; // How wide a leg should be, in degrees
-tab_w = 2; // Tab height
-
-module magnet() {
-    color("SlateGray") {
-        difference() {
-            cylinder(h=magnet_h, d=magnet_od);
-            translate([0, 0, -0.1]) cylinder(h=magnet_h+0.2, d=magnet_id);
-        }
-    }
-}
-
-// Cup to hold the magnets on the bottom
-magnet_cup_tolerance = 1;
-cup_id = magnet_od + magnet_cup_tolerance;
-cup_od = cup_id + wall*2;
-cup_leg_h = wall + throw;
-peg_d = magnet_id - 0.3;
-
-module cup() {
-    union() {
-        cylinder(h=wall, d=cup_od);
-
-        // A peg in the middle to make it easier to assemble.
-        // This goes all the way so we can print without supports
-        cylinder(h=wall+magnet_h, d=peg_d);
-
-        // The tabs on the sides
-        for (i = [0, 120, 240]) {
-            rotate(i) {
-                rotate_extrude(angle=leg_angle) {
-                    translate([cup_id/2, 0, 0]) square([wall, cup_leg_h]);
-                }
-            }
-            rotate(i + leg_angle*0.1) {
-                rotate_extrude(angle=leg_angle*0.8) {
-                    translate([cup_od/2, cup_leg_h-tab_w, 0]) square(tab_w);
-                }
-            }
-        }
-    }
-}
-
-// The thing the cup slides into
-cup_container_tolerance = 0.5;
-container_id = cup_od + cup_container_tolerance;
-container_od = container_id + wall*4;
-container_h = wall + throw + gap + wall; // Height of the container that the cup goes into
-
-module channel(h) {
-    rotate_extrude(angle=leg_angle) {
-        translate([cup_od/2, 0, 0]) square([tab_w, h]);
-    }
-}
-module container() {
-    difference() {
-        union() {
-            difference() {
-                cylinder(h=container_h, d=container_od);
-
-                // Carve out space for the cup
-                translate([0, 0, wall]) cylinder(h=container_h, d=container_id);
-            
-                // Carve out channels for the tabs
-                channel_w = tab_w + 0.5;
-                for(i = [0, 120, 240]) {
-                    translate([0, 0, wall]) {
-                        // Channel for the throw
-                        rotate(i) channel(throw + wall);
-
-                        // Channel for the screw-in.
-                        // This is going to droop when printing, so we make it a bit wider
-                        rotate(i+leg_angle) channel(tab_w*1.5);
-
-                        // Channel for insertion
-                        rotate(i+leg_angle+leg_angle) channel(container_h);
-                    }
-                }
-            }
-            // Another post to help center magnets
-            cylinder(h=wall+magnet_h, d=peg_d);
-        }
-
-        // Now drill holes for the sensors
-        for (x = [-1.27, 0, 1.27]) {
-            translate([x, 2, 0]) cube([0.8,0.8, container_h], center=true);
-        }
-    }
-}