footprints 3d: TSOP54 for sdram. Import to FreeCAD, save as freecad

file, close, open, export as VRML

footprints/sdram/TSOP54.3dshapes/TSOP54.scad

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+// Case dimensions
+case_x=22.42;        // Case X dimension
+case_y=10.16;        // Case Y dimension
+case_z=1.2;        // Case Z dimension
+dot_radius=0.3; // Notch radius
+dot_depth=0.1;  // Notch depth
+dot_off_x=0.5;  // Notch offset X
+dot_off_y=0.5;  // Notch offset Y
+color_case=[0.15,0.15,0.15]; // dark gray
+color_dot=[1,1,1]; // white
+
+// Pin arrays parameters
+side1_pins = 27;
+side2_pins = 0;
+side3_pins = 27;
+side4_pins = 0;
+pin_distance =0.808;    // Pin step
+color_pin=[1,1,1]; // white
+
+// Pin parameters
+pin_th = 0.15; // Thickness
+pin_W = 0.375;  // Pin width
+pin_L = 0.8;  // Total Length
+pin_H = case_z/2+pin_th/2; // Pin height (from bottom to top)
+pin_l = 0.4;  // Length of the bottom part
+pin_a = 115;  // Bending angle
+
+translate_to_center=[-(side1_pins-1)*pin_distance/2,-(case_y+pin_L*2)/2,0];
+
+// Bended pin
+// _L - whole pin length
+// _l - length of bottom part
+// _H - whole pin height
+// _th - pin thickness
+// _a - bending angle
+// _W - pin width
+module pin(_L,_l,_H,_th,_a,_W)
+{
+    // Internal variables
+    _d1 = _th*sin(_a) / (1-cos(_a));
+    _d2 = (_th-_H)*cos(_a) / sin(_a);
+
+    rotate([90,0,90])
+    // Extrude the following polygon
+    linear_extrude(height = _W, center = true, convexity = 10, twist = 0)
+        polygon([[0,0],
+                 [_l,0],
+                 [_l+_d2,_H-_th],
+                 [_L,_H-_th],
+                 [_L,_H],
+                 [_l+_d2-_d1,_H],
+                 [_l-_d1,_th],
+                 [0,_th]]);
+}
+
+// Array of pins
+// _cnt - number of pins
+// _distance - distance between pin centres
+module pins_array(_cnt, _distance)
+{
+    if (_cnt>0)
+    color(color_pin)
+    {
+        for (_i = [0:_cnt-1])
+        {
+            translate([_distance*_i,0,0])
+                pin(pin_L,pin_l,pin_H,pin_th,pin_a,pin_W);
+        }
+    }
+}
+
+// Simple case with notch
+module case()
+{
+    difference()
+    {
+        translate([case_x/2,case_y/2,case_z/2])
+        color(color_case)
+          cube([case_x,case_y,case_z],center=true);
+        translate([dot_radius+dot_off_x,dot_radius+dot_off_y,case_z])
+          color(color_dot)
+            cylinder(h=dot_depth*2, r = dot_radius, center= true, $fn = 10);
+    }
+}
+
+
+// Complete model
+// scale(1/2.54) // 1/2.54=0.3937 scale for Kicad
+module ic()
+{
+  // Case
+  translate([-(case_x-(side1_pins-1)*pin_distance)/2,pin_L,0]+translate_to_center)
+      case();
+
+  translate(translate_to_center)
+  union()
+  {
+    // Top pins
+    translate([(side1_pins-side3_pins)*pin_distance/2,case_y+pin_L*2,0])
+        mirror([0,1,0])
+            pins_array(side3_pins, pin_distance);
+
+    // Bottom pins
+    pins_array(side1_pins, pin_distance);
+
+    // Left pins
+    translate([-(case_x-(side1_pins-1)*pin_distance)/2 - pin_L,pin_L+case_y/2-(side4_pins-1)*pin_distance/2,0])
+        mirror([1,0,0])
+            rotate([0,0,90])
+                pins_array(side4_pins, pin_distance);
+
+    // Right pins
+    translate([-(case_x-(side1_pins-1)*pin_distance)/2-pin_L+case_x+2*pin_L,pin_L+case_y/2-(side2_pins-1)*pin_distance/2,0])
+        mirror([0,1,0])
+            mirror([0,1,0])
+                rotate([0,0,90])
+                    pins_array(side2_pins, pin_distance);
+    }
+}
+
+ic();