diff --git a/avr/devices/n29/enclosure.scad b/avr/devices/n29/enclosure.scad
new file mode 100644
index 0000000..e323e3e
--- /dev/null
+++ b/avr/devices/n29/enclosure.scad
@@ -0,0 +1,245 @@
+$fn = 50;
+
+width = 45;
+length = 60;
+height = 20;
+
+corner_radius = 2;
+wall_thickness = 1.5;
+post_diameter = 8;
+post_height = 0;
+
+hole_diameter = 3;
+
+lid_height = 4;
+lid_tolerance = .3;
+
+hook_height = 1;
+hook_tolerance = 0.75;
+hook_slit_height = 2.5;
+
+airslit_height = 1.75;
+
+ridge_height = 16;
+ridge_width = 1;
+ridge_depth = 2.5;
+
+netconn_width = 17;
+netcomm_length = 6;
+netcomm_height = 20;
+netcomm_tolerance = .3;
+
+
+
+module posts(x, y, z, h, r){
+    translate([x, y, z])
+      cylinder(r = r, h = h);
+
+    translate([-x, y, z])
+      cylinder(r = r, h = h);
+
+    translate([-x, -y, z])
+      cylinder(r = r, h = h);
+
+    translate([x, -y, z])
+      cylinder(r = r, h = h);
+}
+
+
+union() {
+    difference() {
+        // box
+        hull() {
+            posts(
+                x=(width/2 - corner_radius), 
+                y=(length/2 - corner_radius),
+                z=0,
+                h=height,
+                r=corner_radius);
+        }
+        
+        // hollow
+        hull() {
+            posts(
+                x=(width/2 - corner_radius - wall_thickness), 
+                y=(length/2 - corner_radius - wall_thickness),
+                z=wall_thickness,
+                h=height,
+                r=corner_radius);
+        }
+    
+        // lip inside box
+        *hull() {
+            posts(
+                x=(width/2 - corner_radius - lid_lip), 
+                y=(length/2 - corner_radius - lid_lip),
+                z=(height - lid_thickness),
+                h=(lid_thickness + 1),
+                r=corner_radius);
+        }
+    
+        // ventilation slits left 1
+        for(i = [(wall_thickness+post_height+3):(airslit_height*2):(height-5)]) {
+            translate([(-width/2)-wall_thickness, (-length/4), i])
+                cube([10, length/5, airslit_height], center=true);
+        }
+    
+        // ventilation slits top
+        for(i = [(wall_thickness+post_height+3):(airslit_height*2):(height-5)]) {
+            translate([0, -(length/2), i])
+                cube([width/2, 10, airslit_height], center=true);
+        }
+    
+        // ventilation slits right 1
+        for(i = [(wall_thickness+post_height+3):(airslit_height*2):(height-5)]) {
+            translate([(width/2)-wall_thickness, (-length/4), i])
+                cube([10, length/5, 1.75], center=true);
+        }
+       
+        // network connector hole 1
+        translate([(netconn_width-netcomm_tolerance)/2, 
+                    (length/2),
+                    wall_thickness+2+10])
+            cube([netconn_width+netcomm_tolerance,
+                  netcomm_length,
+                  netcomm_height],
+                 center=true);
+    
+        // network connector hole 2
+        translate([-(netconn_width-netcomm_tolerance)/2, 
+                    (length/2),
+                    wall_thickness+2+10])
+            cube([netconn_width+netcomm_tolerance,
+                  netcomm_length,
+                  netcomm_height],
+                 center=true);
+
+        // LED hole
+        translate([12, -16, -wall_thickness])
+          cylinder(r = 5.5/2, h = 6);
+
+        // Motion sensor hole
+        translate([0, -16, -wall_thickness])
+          cylinder(r = 11/2, h = 6);
+
+        // Photodiode hole
+        translate([-11, -16, -wall_thickness])
+          cylinder(r = 5.5/2, h = 6);
+    
+    }
+
+     // hooks upward facing side
+     translate([-(width/2)-0.25, length/8, height-(hook_height/2)])
+       cube([2.5, 7, hook_height], center=true);
+     translate([-(width/2)-0.25, -length/8, height-(hook_height/2)])
+       cube([2.5, 7, hook_height], center=true);
+
+    // hooks downward facing side
+    translate([(width/2)+0.25, length/8, height-(hook_height/2)])
+      cube([2.5, 7, hook_height], center=true);
+    translate([(width/2)+0.25, -length/8, height-(hook_height/2)])
+      cube([2.5, 7, hook_height], center=true);
+
+    // ridges to hold the pcb
+    translate([(width/2)-wall_thickness, 0, ridge_height/2+(height-ridge_height)])
+      cube([ridge_depth, ridge_width, ridge_height], center=true);
+
+    translate([-((width/2)-wall_thickness), 
+               length/8,
+               ridge_height/2+(height-ridge_height)])
+      cube([ridge_depth, ridge_width, ridge_height], center=true);
+
+    translate([-((width/2)-wall_thickness), 
+               -length/8,
+               ridge_height/2+(height-ridge_height)])
+      cube([ridge_depth, ridge_width, ridge_height], center=true);
+
+
+}
+
+
+/* lid */
+translate([0, 0, 50]) { /* match at Z=16.5, otherwise 50*/
+  difference() {
+    union() {
+        difference() {
+            hull() {
+                posts(
+                      x=(width/2 - corner_radius + wall_thickness + lid_tolerance), 
+                      y=(length/2 - corner_radius + lid_tolerance),
+                      z=0,
+                      h=lid_height+wall_thickness,
+                      r=corner_radius);
+            }
+
+            hull() {
+                posts(
+                      x=(width/2 - corner_radius ), 
+                      y=(length/2 - corner_radius)+5,
+                      z=-(wall_thickness),
+                      h=lid_height+wall_thickness,
+                      r=corner_radius);
+            }
+
+            // slits for hooks (upward facing side)
+            translate([-((width/2)+wall_thickness/2),
+                       length/8,
+                       lid_height-((hook_slit_height)/2)])
+                cube([4, 9, hook_slit_height], center=true);
+            translate([-((width/2)+wall_thickness/2),
+                       -length/8,
+                       lid_height-((hook_slit_height)/2)])
+                cube([4, 9, hook_slit_height], center=true);
+
+            // slits for hooks (downward facing side)
+            translate([(width/2)+(wall_thickness/2),
+                       length/8,
+                       lid_height-((hook_slit_height)/2)])
+                cube([4, 9, hook_slit_height], center=true);
+            translate([(width/2)+(wall_thickness/2),
+                       -length/8,
+                       lid_height-((hook_slit_height)/2)])
+                cube([4, 9, hook_slit_height], center=true);
+        }
+        
+   
+        // hooks downward facing side
+        *translate([(width/2)-lid_lip, 0, 1])
+            cube([2, 5, hook_thickness], center=true);
+        *translate([(width/2)-lid_lip, length/4, 1])
+            cube([2, 5, hook_thickness], center=true);
+        *translate([(width/2)-lid_lip, -length/4, 1])
+            cube([2, 5, hook_thickness], center=true);
+    
+      }
+
+    // drilling holes    
+    translate([0, 0, -wall_thickness])
+      cylinder(r = hole_diameter, h = 10);
+
+    translate([0, -(length/3), -wall_thickness])
+      cylinder(r = hole_diameter, h = 10);
+      
+ }
+}
+
+
+
+// support posts for pcb
+/*difference() {
+    translate([0, length/4, wall_thickness])
+        cylinder(r = post_diameter/2, h = post_height);
+
+    translate([0, length/4, wall_thickness])
+        cylinder(r = hole_diameter/2, h = post_height+3);
+}
+
+
+difference() {
+    translate([0, -length/4, wall_thickness])
+        cylinder(r = post_diameter/2, h = post_height);
+
+    translate([0, -length/4, wall_thickness])
+        cylinder(r = hole_diameter/2, h = post_height+3);
+}
+*/
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