refactored files add some new ones

2026-02-23 20:46:02 +13:00
parent ade276e1ec
commit 3a634cdb18
5 changed files with 293 additions and 0 deletions
--- a/modules/idt.scad
+++ b/modules/idt.scad
@@ -0,0 +1,69 @@
+// creates 1 side of the idt
+module delay_line(lambda = 1, n_fingers = 1, finger_length = 50, gap = 0, thickness = 0) {
+    // code
+    l45 =lambda*5/4;
+    l2 = lambda/2;
+    l4 = lambda/4;
+    l8 = lambda/8;
+    b = l4 + thickness;
+    f = l4 + finger_length*lambda;
+
+    points_cap = [
+        [0, 0],
+        [0, l2],
+        [-b-f, l2],
+        [-b-f, l4],
+        [-b, l4],
+        [-b, 0]
+    ];
+
+    points = [
+        [0, 0],
+        [b, 0],
+        [b, l2],
+        [b+f, l2],
+        [b+f, l2+l4],
+        [b, l2+l4],
+        [b, l4*5-l4],
+        [0, l4*5-l4]
+    ];
+    // union () {
+
+    translate([0, l2, 0]){
+            for(i = [0:n_fingers]){
+                translate([0, i*(l45-l4), 0]) {
+                polygon(points);
+                }
+            }
+
+        color("red") {
+            rotate([0, 0, 180])
+            translate([0, 0, 0]) {
+                polygon(points_cap);
+            }
+
+            translate([f+l2+gap+thickness, -l2, 0]) {
+                square(size=[l4+thickness, l4]);
+            }
+        }
+
+        
+            union() {
+                for(i = [0:n_fingers]){
+                    translate([2*b+f+gap+l4, i*(l45-l4)+l2+l4 , 0]) 
+                    rotate([0, 0, 180])
+                    polygon(points);
+                }
+            }
+        
+        color("red") {
+            translate([2*b+f+gap+l4, n_fingers*lambda+lambda-l4, 0]) {
+                polygon(points_cap);
+            }
+            translate([0, n_fingers*lambda+lambda, 0]) {
+                square(size=[l4+thickness, l4]);
+            }
+        }
+
+    }
+}