From 0620887cc5482ac6e1a1afdaeeef2609d74618c2 Mon Sep 17 00:00:00 2001
From: "Ricardo (XenGi) Band" <email@ricardo.band>
Date: Sun, 26 Mar 2023 19:52:23 +0200
Subject: [PATCH] add lower half

---
 lower_case.scad | 63 +++++++++++++++++++++++++++++++++++++++++++++++++
 pcb.scad        | 30 +++++++++++++----------
 2 files changed, 80 insertions(+), 13 deletions(-)
 create mode 100644 lower_case.scad

diff --git a/lower_case.scad b/lower_case.scad
new file mode 100644
index 0000000..a02c7a9
--- /dev/null
+++ b/lower_case.scad
@@ -0,0 +1,63 @@
+$fn = 64;
+pcb_width = 81;
+pcb_length = 119;
+case_thickness = 3;
+case_height = 15;
+pcb_thickness = 1.6;
+breakout_width = 21;
+breakout_length = 13;
+inner_depth = 5;
+
+module pcb(h) {
+    pcb_thickness = h ? h : 1.6;
+    pcb_corner_radius = 5;
+    
+    translate([pcb_corner_radius,pcb_corner_radius,0]) hull() {
+        cylinder(h=pcb_thickness, r=pcb_corner_radius);
+        translate([pcb_width-2*pcb_corner_radius,0,0]) cylinder(h=pcb_thickness, r=pcb_corner_radius);
+        translate([0,pcb_length-2*pcb_corner_radius,0]) cylinder(h=pcb_thickness, r=pcb_corner_radius);
+        translate([pcb_width-2*pcb_corner_radius,pcb_length-2*pcb_corner_radius,0]) cylinder(h=pcb_thickness, r=pcb_corner_radius);
+    }
+}
+
+module lower_case() {
+    translate([0,0,-1*case_height]) {
+        difference() {
+            cube([pcb_width + 2*case_thickness, pcb_length + 2*case_thickness, case_height]);
+            translate([0,-1,-1*case_height/2+1]) rotate([-1.6,0,0]) cube([pcb_width+2*case_thickness, pcb_length+2*case_thickness+2, 10]);
+        }
+    }
+}
+
+module standoff(x, y) {
+    translate([case_thickness+x,case_thickness+y,-1*inner_depth]) difference() {
+        translate([0,0,(inner_depth-pcb_thickness)/2]) cylinder(h=inner_depth-pcb_thickness, d=3.5, center=true);
+        translate([0,0,(inner_depth-pcb_thickness)/2]) cylinder(h=inner_depth-pcb_thickness, d=1, center=true);
+  }
+}
+
+module usb_breakout() {
+    breakout_thickness = 1;
+    
+    cube([breakout_width, breakout_length, breakout_thickness]);
+    // USB-C
+    translate([breakout_width/2, breakout_length-8/2+1, -4/2]) cube([10, 8, 4], center=true);
+    translate([breakout_width/2, breakout_length-8/2+1+7, -4/2]) cube([16, 8, 8], center=true);
+    
+    // screw holes
+    translate([2.5,breakout_length-2.5,-2]) cylinder(h=2,d=1);
+    translate([breakout_width-2.5,breakout_length-2.5,-2]) cylinder(h=2,d=1);
+}
+
+difference() {
+    lower_case();
+    translate([case_thickness, case_thickness, -1*inner_depth]) pcb(inner_depth);
+    translate([(pcb_width + 2*case_thickness)/2-breakout_width/2,pcb_length + 2*case_thickness-breakout_length-case_thickness,-1*(inner_depth+1)]) usb_breakout();
+}
+
+standoff(21.5, pcb_length-97);
+standoff(56, pcb_length-97.5);
+standoff(21.5, pcb_length-31.5);
+standoff(59.5, pcb_length-31.5);
+
+// TODO: screw holes for top half
\ No newline at end of file
diff --git a/pcb.scad b/pcb.scad
index 548d8bb..0640914 100644
--- a/pcb.scad
+++ b/pcb.scad
@@ -1,14 +1,12 @@
-$fn = 64;
+/* 75x113 keycap area
+ * 
+ */
 
-pcb_thickness = 1.6;
+$fn = 64;
 pcb_width = 81;
 pcb_length = 119;
-pcb_corner_radius = 5;
-kailh_height=2;
 
-// translate([-100,0,0]) linear_extrude(1.5) import(file="t9_plate.svg", center=false);
-
-module kailh () {
+ module kailh () {
     kailh_height=2;
     kailh_corner_radius=2;
     kailh_width=10.8;
@@ -36,11 +34,16 @@ module switch () {
     translate([switch_width/2-0.625,switch_length/2-2,switch_height]) cube([1.25,4,3.5]);
 }
 
-translate([pcb_corner_radius,pcb_corner_radius,0]) hull() {
-    cylinder(h=pcb_thickness, r=pcb_corner_radius);
-    translate([pcb_width-2*pcb_corner_radius,0,0]) cylinder(h=pcb_thickness, r=pcb_corner_radius);
-    translate([0,pcb_length-2*pcb_corner_radius,0]) cylinder(h=pcb_thickness, r=pcb_corner_radius);
-    translate([pcb_width-2*pcb_corner_radius,pcb_length-2*pcb_corner_radius,0]) cylinder(h=pcb_thickness, r=pcb_corner_radius);
+module pcb() {
+    pcb_thickness = 1.6;
+    pcb_corner_radius = 5;
+    
+    translate([pcb_corner_radius,pcb_corner_radius,0]) hull() {
+        cylinder(h=pcb_thickness, r=pcb_corner_radius);
+        translate([pcb_width-2*pcb_corner_radius,0,0]) cylinder(h=pcb_thickness, r=pcb_corner_radius);
+        translate([0,pcb_length-2*pcb_corner_radius,0]) cylinder(h=pcb_thickness, r=pcb_corner_radius);
+        translate([pcb_width-2*pcb_corner_radius,pcb_length-2*pcb_corner_radius,0]) cylinder(h=pcb_thickness, r=pcb_corner_radius);
+    }
 }
 
 translate([15.5,12.8,0]) kailh();   // 0
@@ -84,4 +87,5 @@ translate([43,100,0]) switch();
 translate([25,107.8,0]) kailh();    // Play/Pause
 translate([24,100,0]) switch();
 translate([6,107.8,0]) kailh();     // Prev
-translate([5,100,0]) switch();
\ No newline at end of file
+translate([5,100,0]) switch();
+pcb();