Phone cluster stand.

functional/phone-cluster-stand.scad

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+bays = 5;
+wt = 2;   // wall thickness
+pt = 12;  // phone thickness
+l = 170;  // length
+h = 40;   // height
+w = bays * (pt + wt) + wt;
+lip = 10;
+
+T=atan((h - lip + 0.5) / l);
+
+difference() {
+  union() {
+    cube([w, l, wt]);   // base
+    cube([w, wt, lip]); // front lip
+
+    // back
+    translate([0, l - wt, 0])
+      cube([w, wt, h]);
+
+    // side walls
+    for (i = [0 : bays]) {
+      translate([i*(pt + wt), 0, lip]) rotate([T, 0, 0])
+        translate([0, 0, -h]) cube([wt, l / cos(T), h]);
+    }
+  }
+
+  translate([-wt, -wt, -h]) cube([w+2*wt, l+2*wt, h]);  // bottom
+  translate([-wt, -wt, h]) cube([w+2*wt, l+2*wt, h]);   // top
+  translate([-wt, l, -wt]) cube([w+2*wt, l, h + 2*wt]); // back
+}
+/*
+sin(ang) = opp / hyp
+ang = asin(opp/hyp)
+cos(ang) = adj / hyp
+hyp = adj / cos(ang)
+*/