From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Wed, 15 Jan 2014 10:05:13 +0000 (+0100)
Subject: heater-base.scad: Proof of concept case bottom
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=commitdiff_plain;h=62e66db3d05dc177bf08d8ce365f582fafbf63a4;p=heater.git

heater-base.scad: Proof of concept case bottom
---

diff --git a/heater-base.scad b/heater-base.scad
new file mode 100644
index 0000000..a3a5706
--- /dev/null
+++ b/heater-base.scad
@@ -0,0 +1,87 @@
+// 18650 is ~18mm diameter, ~65mm length, 
+batt_diam = 18;
+batt_len = 65+1;
+batt_clip_h = 0.75 * batt_diam;
+wall = 2.2;
+
+eps = 0.01;
+infty = 300;
+
+pcb_len = 36;
+pcb_thick = 1.3;
+pcb_groove = 2;
+pcb_width = 11;
+pcb_clip_off = 5;
+pcb_clip_w = 8;
+
+wire_thick = 2;
+wire_sep = 3;
+
+translate([0, -batt_diam/2-wall-pcb_thick/2+eps, 0])
+difference() {
+	union() {
+		// lower part of the PCB holder
+		translate([0, 0, (pcb_groove + wall) / 2])
+			cube([pcb_len + 2*wall, pcb_thick + 2*wall, pcb_groove + wall], center=true);
+		// rear part of the PCB holder (behind S1)
+		translate([pcb_clip_off, 0, 0])
+			cube([pcb_clip_w, pcb_thick/2+wall/2, pcb_width + 2*wall]);
+		// side part of the PCB holder (near the battery wires)
+		translate([-pcb_len/2-wall, -pcb_thick/2-wall, 0])
+			cube([pcb_groove+wall, pcb_thick+1.5*wall, pcb_width + 2*wall]);
+	};
+	// the PCB itself
+	translate([0, 0, wall + pcb_width/2])
+		cube([pcb_len, pcb_thick, pcb_width+eps], center=true);
+};
+
+difference() {
+	union() {
+		// lower part of the battery holder
+		translate([0, 0, pcb_groove/2 + wall/2])
+			cube([batt_len + 2*wall, batt_diam + 2*wall, pcb_groove + wall],
+			center=true);
+		// rear part of the battery clip
+		translate([-(batt_len/2-pcb_len/2+pcb_groove+wall)/2-pcb_len/2+pcb_groove, 0, batt_clip_h/2+wall/2])
+			cube([batt_len/2-pcb_len/2+pcb_groove + wall, batt_diam + 2*wall, batt_clip_h + wall], center=true);
+		// front (+) part of the battery clip
+		translate([batt_len/2+wall/2, 0, batt_clip_h/2+wall/2])
+			hull() {
+				cube([wall, batt_diam + 2*wall, batt_clip_h + wall], center=true); 
+				translate([-10/2, 0, -batt_clip_h/2])
+				cube([10, batt_diam+2*wall, wall], center=true);
+			};
+		// middle clips
+		translate([pcb_clip_off+pcb_clip_w/2, 0, batt_clip_h/2+wall/2])
+			hull() {
+				cube([pcb_clip_w, batt_diam + 2*wall, batt_clip_h + wall], center=true);
+				translate([0, 0, -batt_clip_h/2])
+				cube([2*pcb_clip_w, batt_diam+2*wall, wall], center=true);
+			};
+	};
+	// battery
+	translate([-batt_len/2, 0, batt_diam/2+wall])
+		rotate([0, 90, 0])
+		cylinder(r=batt_diam/2, h = batt_len);
+	// top part rounded
+	difference() {
+		translate([0, 0, infty/4 + wall + batt_diam/2])
+			cube([infty/2, infty/2, infty/2], center=true);
+		translate([-infty/2, 0, batt_diam/2+wall])
+			rotate([0, 90, 0])
+			cylinder(r=batt_diam/2+wall, h = infty);
+	};
+	// wire holes
+	for (j=[-wire_sep/2, wire_sep/2]) 
+	for (i=[-wire_sep/2, wire_sep/2]) 
+	translate([-infty/2, i, batt_diam/2 + wall+j])
+		rotate([0, 90, 0])
+		rotate([0, 0, 90])
+		cylinder(r=wire_thick/2, h = infty, $fn=6);
+
+	translate([-infty/2, -batt_diam/2, wall + pcb_groove + wire_thick/2])
+		rotate([0, 90, 0])
+		rotate([0, 0, 90])
+		cylinder(r=wire_thick/2, h = infty, $fn=6);
+};
+