more accurate secondary display model

model/common.scad

@@ -15,15 +15,27 @@ module pad() {
   cube([20, 20, 10]);
 }
 
-module small_display_below_main() {
+module secondary_display(pin_header = false) {
   // https://de.aliexpress.com/item/1005003753680706.html
-  cube([45.8, 20, 11.3]);
-  // old i2c variant:
-  //cube([43.5, 19.44, 4.5]);
+  length = 45.8;
+  width = 20;
+  height = 3.7;
 
-  // initial dimension ideas
-  // cube([38,16,4]);
-  // translate([150,0,0]) cube([22,5.5,4]);
+  pins_height = 11.3;
+  pins_width = 2.5; // width of socket, not pin
+
+  hole_diameter = 2;
+  hole_inset = 1.5;
+
+  difference() {
+    cube([length, width, height]) if (pin_header)
+      position(LEFT + FRONT)
+        cube([pins_width, width, pins_height]);
+
+    move([length - hole_inset, width / 2, height / 2]) ycopies(width - (2 * hole_inset) - hole_diameter) {
+        cyl(d=hole_diameter, h=height + EPS, orient=UP, anchor=RIGHT);
+      }
+  }
 }
 
 module tertiary_display() {