// challenge-bot
// GNU AGPLv3 (or later at your option)
// project available at these locations:
// https://gitorious.org/ozzloy/challenge-bot
// https://github.com/waynegramlich/challenge-bot


// sonar sensor measurements from https://www.thingiverse.com/thing:92869,
//  released under GPL.
deck_depth = 4.7625; // 3/8 inch in mm
sonar_plate_width = 20;
sonar_plate_length = 45;
sonar_plate_height = 1.2;
sonar_sensor_radius = 8;
sonar_sensor_height = 13.8;
sonar_holder_length = sonar_plate_length + 30;
sonar_holder_depth = 3;

difference (){
  union(){
    cube([sonar_holder_length, sonar_plate_width, sonar_holder_depth]);
    translate([sonar_plate_length + 5, 0, sonar_holder_depth]){
      cube([5, sonar_plate_width, deck_depth]);
      translate([0, 0, deck_depth]){
        cube([sonar_holder_length - sonar_plate_length - 5,
              sonar_plate_width,
              sonar_holder_depth]);}}}
  translate([45/2 - 13.5, 10, 0]){
    cylinder(r=sonar_sensor_radius, h = sonar_sensor_height, center = true);}
  translate([45/2 + 13.5, 10, 0]){
    cylinder(r=sonar_sensor_radius, h = sonar_sensor_height, center = true);}}