width = 8;
strength = 2;
hole_diameter = 2.3;
//hole_space = 45.5; // adafruit pwm module
//hole_space = 15.3; // adafruit 3-axis accelerometer
//hole_space = 49; // raspberry pi 3 model b
//hole_space = 46; // 2 channel relais card
//hole_space = 66.5; // 8-ch ssr relais card
//hole_space = 30; // 12 to 5v dc-dc converter
//hole_space = 46.5; // 8-ch relais card (mechanical)
//hole_space = 42; // orange pi
hole_space = 28; // DPS5005

if (width < 5) {
     base(5);
} else {
    base(width);
}

module base(width) {
     linear_extrude(height = width, center = true, convexity = 10) import(file = "dxfimporttest.dxf", layer = "lower");
     mountinghole(width);

     if (hole_space > 31 && hole_space < 36.5) {

          linear_extrude(height = width, center = true, convexity = 10) import(file = "dxfimporttest.dxf", layer = "upper");
          // upper connections of release mechanism with mounting hole
          translate([-strength, 36, -width/2]) cube([strength, hole_diameter + 2 + 1, width]);
          translate([-8, 36, -width/2]) cube([1, hole_diameter + 2 + 1, width]);
          translate([-6, hole_diameter * 2, -width/2]) cube([6, 34 - hole_diameter * 2, width]);

          translate([0, hole_space, 0]) mountinghole(width);

          } else {

              if (hole_space > 36) {
                   difference() {
                      union() {
                        translate([0, hole_space - 34]) linear_extrude(height = width, center = true, convexity = 10) import(file = "dxfimporttest.dxf", layer = "upper");
                        // upper connections of release mechanism with mounting hole
                        translate([-strength, 34, -width/2]) cube([strength, hole_diameter + hole_space - 29, width]);
                        translate([-8, 36, -width/2]) cube([1, hole_diameter + hole_space - 31, width]);
                        translate([-6, hole_diameter * 2, -width/2]) cube([6, 34 - hole_diameter * 2, width]);
                        translate([0, hole_space, 0]) mountinghole(width);
                      }
                      translate([-6, hole_diameter + hole_space, 0]) rotate([0, 90, 0]) cylinder(15, d=hole_diameter, d=hole_diameter, $fn=25);
                      }

              } else {

                  translate([0, hole_space, 0]) mountinghole(width);
                  translate([0, -5, 0]) linear_extrude(height = width, center = true, convexity = 10) import(file = "dxfimporttest.dxf", layer = "upper");
                  translate([-6, hole_diameter * 2, -width/2]) cube([6, 35 - hole_diameter * 4, width]);

              }

     }
}


module mountinghole(width) {
  difference() {
    union() {
    // lower cube and mounting hole
    translate([-6, 0, -width/2]) cube([6, hole_diameter * 2, width]);
    translate([-2, hole_diameter, 0]) rotate([0, 90, 0]) cylinder(4, d=hole_diameter + 2, d=hole_diameter + 2, $fn=25);
    }
    translate([-10, hole_diameter, 0]) rotate([0, 90, 0]) cylinder(15, d=hole_diameter, d=hole_diameter, $fn=25);
  }
}