etc: scads of random scad
[clinton/3d-models.git] / etc / mosquito-honeypot.scad
1 // Simple cover for a mosquito bacillus thuringiensis trap
2
3 // UV radiation may slowly kill the bt... so use an opaque container
4 // and cover it with a lid with a smaller hole in it. Might help
5 // control evaporation as well, and it helps not having open
6 // containers of water around (probably don't want wild animals
7 // drinking a soup of decaying bug larvaue).
8
9 // The trap itself is just water, orange blossom water (which contains
10 // skatole... I think) as an attractant, and some bt granules or
11 // dunks.
12
13 $fa = 0.1;
14 $fs = 0.5;
15
16 module mosquito_honeypot_lid (lid_diameter = 50, lid_depth = 15, hole_width = 20, wall_thickness = 1, bottom_thickness = 2)
17 {
18 total_h = lid_depth + bottom_thickness;
19 difference () {
20 cylinder (d = lid_diameter + wall_thickness*2, h = total_h, center = true);
21 translate ([0, 0, bottom_thickness/2 + 1/2])
22 #cylinder (d = lid_diameter, h = lid_depth+1, center = true);
23
24 translate ([0, 0, -lid_depth/2])
25 cube ([hole_width, hole_width, bottom_thickness*4], center = true);
26 }
27 }
28
29 // wall thickness calculation halves value
30 //mosquito_honeypot_lid (lid_diameter=72.5, lid_depth=18, wall_thickness=4, bottom_thickness=2);
31
32
33 mosquito_honeypot_lid (lid_diameter=71, lid_depth=25, wall_thickness=2, bottom_thickness=2, hole_width=25);