| 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); |