modified board and added sensor mount 3d model

3DModels/distance_measuring_sensor_unit_mount.scad

@@ -0,0 +1,28 @@
+// unit: mm
+base1 = [45, 5, 20];
+base2 = [
+    base1[0],
+    20,
+    5
+];
+DMU_hole_separation = 37;
+screw_diameter = 3.2;
+screw_margin = 0.05;
+
+union() {
+    difference() {
+        cube(base2);
+        translate([base2[0]/2,base2[1] * 0.7,base2[2]/2]) 
+            cylinder(h = base2[2], d = screw_diameter + screw_margin, center = true, $fn = 360);
+    }
+    translate([0,0,base2[2]]) difference() {
+        cube(base1);
+        translate(base1/2) {
+            rotate([90,0,0]) translate([-1 * DMU_hole_separation/2,0,0])
+                cylinder(h = base1[1], d = screw_diameter + screw_margin, center = true, $fn = 360);
+            rotate([90,0,0]) translate([DMU_hole_separation/2,0,0])
+                cylinder(h = base1[1], d = screw_diameter + screw_margin, center = true, $fn = 360);
+        }
+    }
+}
+