Started with housing. It is already nice.

cad/open_box.scad

@@ -0,0 +1,38 @@
+/////////////////////////////////////////////////////////////////////////////////
+// Module for a open box with rounded edges.
+//
+// Author: 		Maximilian Stiefel
+// Last modification: 	26.04.3017
+/////////////////////////////////////////////////////////////////////////////////
+
+module open_box(width, length, height, thickness, allowance)
+{
+
+	/////////////////////////////////////////////////////////////////////////
+	// Vars
+	/////////////////////////////////////////////////////////////////////////
+	edge_rounding = 8;
+	compensation = abs(thickness-edge_rounding);
+
+	/////////////////////////////////////////////////////////////////////////
+	// Action
+	/////////////////////////////////////////////////////////////////////////
+	difference(){
+		
+		// Hull 4 cylinders which are compensated against the thickness
+		// so the actual desired thickness and edge rounding is always achieved.
+		hull(){
+			translate([+compensation, +compensation, 0])
+				cylinder(r = edge_rounding, h = height + thickness);
+			translate([width + 2*allowance + 2*thickness - compensation, compensation, 0])
+				cylinder(r = edge_rounding, h = height + thickness);
+			translate([compensation, length + 2*allowance + 2*thickness - compensation,0])
+				cylinder(r = edge_rounding, h = height + thickness);
+			translate([width + 2*allowance + 2*thickness - compensation, length + 2*allowance + 2*thickness - compensation,0])
+				cylinder(r = edge_rounding, h = height + thickness);
+		}
+
+		translate([thickness, thickness, thickness])
+			cube([width + 2*allowance, length + 2*allowance, height + 1]);
+	}
+}

cad/playing.scad

@@ -1,6 +1,26 @@
-translate{[0,0,10]}{
+/////////////////////////////////////////////////////////////////////////////////
+// Housing box for UppSense first tries.
+//
+// Author:              Maximilian Stiefel
+// Last modification:   26.04.3017
+/////////////////////////////////////////////////////////////////////////////////
+
+use <open_box.scad>
+
+/////////////////////////////////////////////////////////////////////////////////
+// Vars
+/////////////////////////////////////////////////////////////////////////////////
+length = 50; 
+width = 80;
+height = 45;
+thickness = 5;
+allowance = 1;
+lid_depth = 5;
+
 difference(){
-	cube([20,20,20], center=true);
+	// Using my open box module for creating a simple box 
-	color([0.2,0.8,1]) sphere(13);
+	open_box(length, width, height, thickness, allowance);
-}
+	// Creating a depening for the lid
+	translate([0, 0, height])
+		cube([length + 2*allowance + 2*thickness, width + 2*allowance + 2*thickness, lid_depth]);
 }

pcb/transimpedance_amp/transimpedance_amp.kicad_pcb

@@ -3,9 +3,9 @@
   (general
     (links 87)
     (no_connects 0)
-    (area 106.899999 80.899999 187.100001 131.100001)
+    (area 100.657143 68.3 210.85 133.238333)
     (thickness 1.6)
-    (drawings 6)
+    (drawings 10)
     (tracks 144)
     (zones 0)
     (modules 48)
@@ -21,7 +21,7 @@
     (34 B.Paste user)
     (35 F.Paste user)
     (36 B.SilkS user)
-    (37 F.SilkS user)
+    (37 F.SilkS user hide)
     (38 B.Mask user)
     (39 F.Mask user)
     (40 Dwgs.User user)
@@ -65,7 +65,7 @@
     (pad_to_mask_clearance 0.2)
     (aux_axis_origin 0 0)
     (grid_origin 134.874 122.682)
-    (visible_elements FFFEFF7F)
+    (visible_elements FFFEFF5F)
     (pcbplotparams
       (layerselection 0x00030_80000001)
       (usegerberextensions false)
@@ -1444,6 +1444,54 @@
       (net 17 "Net-(P5-Pad1)"))
   )
 
+  (dimension 50.038 (width 0.3) (layer Dwgs.User)
+    (gr_text "50,0 mm" (at 219.536 106.045 270) (layer Dwgs.User)
+      (effects (font (size 1.5 1.5) (thickness 0.3)))
+    )
+    (feature1 (pts (xy 186.944 131.064) (xy 220.886 131.064)))
+    (feature2 (pts (xy 186.944 81.026) (xy 220.886 81.026)))
+    (crossbar (pts (xy 218.186 81.026) (xy 218.186 131.064)))
+    (arrow1a (pts (xy 218.186 131.064) (xy 217.599579 129.937496)))
+    (arrow1b (pts (xy 218.186 131.064) (xy 218.772421 129.937496)))
+    (arrow2a (pts (xy 218.186 81.026) (xy 217.599579 82.152504)))
+    (arrow2b (pts (xy 218.186 81.026) (xy 218.772421 82.152504)))
+  )
+  (dimension 80.01 (width 0.3) (layer Dwgs.User)
+    (gr_text "80,0 mm" (at 146.939 135.716) (layer Dwgs.User)
+      (effects (font (size 1.5 1.5) (thickness 0.3)))
+    )
+    (feature1 (pts (xy 186.944 131.064) (xy 186.944 137.066)))
+    (feature2 (pts (xy 106.934 131.064) (xy 106.934 137.066)))
+    (crossbar (pts (xy 106.934 134.366) (xy 186.944 134.366)))
+    (arrow1a (pts (xy 186.944 134.366) (xy 185.817496 134.952421)))
+    (arrow1b (pts (xy 186.944 134.366) (xy 185.817496 133.779579)))
+    (arrow2a (pts (xy 106.934 134.366) (xy 108.060504 134.952421)))
+    (arrow2b (pts (xy 106.934 134.366) (xy 108.060504 133.779579)))
+  )
+  (dimension 5.08 (width 0.3) (layer Dwgs.User)
+    (gr_text "5,0 mm" (at 113.538 96.52) (layer Dwgs.User)
+      (effects (font (size 1.5 1.5) (thickness 0.3)))
+    )
+    (feature1 (pts (xy 106.934 86.106) (xy 106.934 94.14)))
+    (feature2 (pts (xy 112.014 86.106) (xy 112.014 94.14)))
+    (crossbar (pts (xy 112.014 91.44) (xy 106.934 91.44)))
+    (arrow1a (pts (xy 106.934 91.44) (xy 108.060504 90.853579)))
+    (arrow1b (pts (xy 106.934 91.44) (xy 108.060504 92.026421)))
+    (arrow2a (pts (xy 112.014 91.44) (xy 110.887496 90.853579)))
+    (arrow2b (pts (xy 112.014 91.44) (xy 110.887496 92.026421)))
+  )
+  (dimension 5.08 (width 0.3) (layer Dwgs.User)
+    (gr_text "5,0 mm" (at 95.504 83.566 270) (layer Dwgs.User)
+      (effects (font (size 1.5 1.5) (thickness 0.3)))
+    )
+    (feature1 (pts (xy 112.014 86.106) (xy 97.122 86.106)))
+    (feature2 (pts (xy 112.014 81.026) (xy 97.122 81.026)))
+    (crossbar (pts (xy 99.822 81.026) (xy 99.822 86.106)))
+    (arrow1a (pts (xy 99.822 86.106) (xy 99.235579 84.979496)))
+    (arrow1b (pts (xy 99.822 86.106) (xy 100.408421 84.979496)))
+    (arrow2a (pts (xy 99.822 81.026) (xy 99.235579 82.152504)))
+    (arrow2b (pts (xy 99.822 81.026) (xy 100.408421 82.152504)))
+  )
   (dimension 20 (width 0.3) (layer Dwgs.User)
     (gr_text "20,000 mm" (at 117 69.65) (layer Dwgs.User)
       (effects (font (size 1.5 1.5) (thickness 0.3)))