hc-sr04: higher case and some other mods

diff --git a/hc-sr04.scad b/hc-sr04.scad
index 2e040ffd1bcf14f8c998497ea5cc134540708a56..51700f9770f7c8b0e5d6a09d15b77f7bf1644175 100644 (file)
--- a/hc-sr04.scad
+++ b/hc-sr04.scad
@@ -5,33 +5,34 @@ wall = 1.5;
 
 cyl_r = 8 + 0.5;
 cyl_x = 27 / 2;
-cyl_h = 10; // above pcb, max 13.8;
+cyl_h = 8; // above pcb, max 13.8;
 
 pcb_x = 45 + 0.5;
 pcb_y = 20 + 0.5;
-xtal_h = 4;
-pcb_supp = 3;
-pcb_h = 5; // 1.2 + space for connector etc
+xtal_h = 5;
+pcb_supp = 3; // side support thickness
+pcb_h = 8; // 1.2 + space for connector etc
+pcb_thick = 2;
 
 cyl_base = pcb_x/2 + wall - cyl_x;
 
 conn_x = 12.5;
-conn_y = 10;
+conn_y = 12;
 
-cable_w = 5;
-cable_h = 2;
+cable_w = 7;
+cable_h = 3;
 
 mount_h = 3;
 screw_sp = 5;
 
 module sensor() {
        hull() {
-               // pcb and the space above it
+               // space above pcb
                translate([-pcb_x/2, -pcb_y/2, -eps])
-                       cube([pcb_x, pcb_y, pcb_h+eps]);
+                       cube([pcb_x, pcb_y, pcb_h-pcb_thick+eps]);
                // connector
                translate([-conn_x/2, pcb_y/2-eps, -eps])
-                       cube([conn_x, conn_y+eps, pcb_h+eps]);
+                       cube([conn_x, conn_y+eps, pcb_h-pcb_thick+eps]);
        }
        // cable protrusion
        translate([-cable_w/2, pcb_y/2+conn_y-eps, -eps])
@@ -40,9 +41,12 @@ module sensor() {
        // cylinders
        for (x = [-1, 1]) translate([cyl_x*x, 0, pcb_h - eps])
                cylinder(r = cyl_r, h = cyl_h + 2+wall + eps);
+       // pcb
+       translate([-pcb_x/2, -pcb_y/2, pcb_h-pcb_thick-eps])
+               cube([pcb_x, pcb_y, pcb_thick+eps]);
        // space below the pcb (xtal, etc)
-       translate([-pcb_x/2+pcb_supp, -pcb_y/2, pcb_h - eps])
-               cube([pcb_x - 2*pcb_supp, pcb_y, xtal_h+eps]);
+       translate([-pcb_x/2+pcb_supp, -pcb_y/2, pcb_h-pcb_thick - eps])
+               cube([pcb_x - 2*pcb_supp, pcb_y, xtal_h+pcb_thick+eps]);
 };
 module case_body() {
        hull() {
@@ -54,7 +58,7 @@ module case_body() {
                for (x = [-1, 1]) translate([cyl_x*x, 0, pcb_h + cyl_h])
                        cylinder(r = cyl_base, h = wall);
 
-               translate([0, 7, pcb_h + cyl_h])
+               translate([0, 8, pcb_h + cyl_h])
                        cylinder(r = cyl_base, h = wall);
 
                // connector
@@ -73,7 +77,13 @@ module case_body() {
 
 difference() {
        case_body();
-       # sensor();
+       difference() {
+               sensor();
+               // pcb clip
+               translate([-8/2, -pcb_y/2, pcb_h-pcb_thick-wall/2])
+               rotate([0, 90, 0])
+               cylinder(r=wall/2, h = 8, $fn = 4);
+       }
        // mount holes
        for (x = [0, 180]) rotate([0, 0, x]) {
                translate([pcb_x/2+wall, -screw_sp/2, wall])
@@ -82,7 +92,7 @@ difference() {
                        cube([3, 3, wall + 2*eps]);
        }
        // text
-       translate([0, 3, pcb_h + cyl_h + eps])
+       translate([0, 3.5, pcb_h + cyl_h + eps])
                rotate([0, 0, 90])
                linear_extrude(height=wall)
                text("CVT FI", font="DejaVu Sans:style=Bold", size=5,