added falcon tube holder

hardware/peristaltic-pump/tube-holder.scad

@@ -0,0 +1,56 @@
+$fn = 100;
+
+case_thickness = 3;
+case_wide = 100;
+
+tube_count = 3;
+tube_radius = 15;
+tube_height = 20;
+
+module hook()
+{
+	translate([ 23.5, -(tube_height + case_thickness * 1.5), tube_height - case_thickness ])
+	rotate([ 0, 90, 0 ])
+	{
+		linear_extrude(tube_height)
+		{
+			square([ tube_height - case_thickness, case_thickness ]);
+			rotate([ 0, 0, 90 ])
+			square([ case_thickness * 2.5, case_thickness ]);
+		}
+	}
+}
+
+module tube_holes(radius = tube_radius)
+{
+	circle(radius);
+
+	translate([ (tube_radius * 2) + case_thickness, 0, 0 ])
+	circle(radius);
+
+	translate([ ((tube_radius * 2) + case_thickness) * 2, 0, 0 ])
+	circle(radius);
+}
+
+module tube_holder_base()
+{
+	difference()
+	{
+		hull()
+		{
+			tube_holes(tube_radius + (case_thickness));
+		}
+		tube_holes();
+	}
+}
+
+module tube_holder()
+{
+	linear_extrude(tube_height)
+	{
+		tube_holder_base();
+	}
+	hook();
+}
+
+tube_holder();