Suports:  sensor ultrasons HC-SR04 (4 forats)

Codi openscad

difference () {

 union () {

  cube ([55, 31, 2]);

  translate ([20, -30, 0]) 

    cube ([15, 30, 2]);

  translate ([20, -32, 0]) 

    cube ([15, 2, 17]); 

  translate ([18, -32, 0]) 

    cube ([2, 34, 5]); 

  translate ([35, -32, 0]) 

    cube ([2, 34, 5]); 

  translate ([13, 0, 0]) 

    cube ([5, 2, 5]); 

  translate ([37, 0, 0]) 

    cube ([5, 2, 5]); 

}

 union () {

  translate ([14, 15, 0]) 

     cylinder (h=2, r=8.5 , $fs=0.1 );

  translate ([40, 15, 0]) 

     cylinder (h=2, r=8.5 , $fs=0.1 );

  translate ([20, 5, 0]) 

     cube ([14, 20, 2]);

  translate ([6, 6, 0]) 

     cylinder (h=2, r=1 , $fs=0.1 );

  translate ([6, 24, 0]) 

     cylinder (h=2, r=1 , $fs=0.1 );

  translate ([48, 6, 0]) 

     cylinder (h=2, r=1 , $fs=0.1 );

  translate ([48, 24, 0]) 

     cylinder (h=2, r=1 , $fs=0.1 );

translate ([27.5, -30, 10]) {

 rotate ([90, 0, 0])

    cylinder (h=2, r=2, $fs=0.1);

}

}

}

Cal utilitzar cargols de 1,6 mm per a aquest model