// https://gitorious.org/ozzloy/challenge-bot
// https://github.com/waynegramlich/challenge-bot
+/*
+ this holds an hc-sr04 sonar sensor to a 3/16 inch deck.
+ http://fritzing.org/projects/hc-sr04-project
+ it can hold the sonar sensor either facing down, or forwards.
+ when facing down, it can detect if it passes over the edge of a table.
+ when facing forwards, it can detect and follow something in front of it.
+ */
+
$fn = 60;
+use <oshw.scad>
+oshw_dy = 120.366;
+oshw_dx = 133.888;
+
// 3/16 inch in mm deck_depth = 4.7625;
// 1/4 inch in mm = 6.35
// subtract a little to be a squeeze fit
module deck_holder(){
deck_holder_width = sonar_holder_width - deck_depth;
+ deck_holder_height = sonar_holder_depth * 2 + deck_depth;
linear_extrude(height = deck_holder_width){
difference(){
- square([deck_holder_length, sonar_holder_depth * 2 + deck_depth]);
+ square([deck_holder_length, deck_holder_height]);
translate([sonar_holder_depth, sonar_holder_depth]){
square(deck_depth);}
- translate([sonar_holder_depth * 2 + deck_depth, sonar_holder_depth]){
- square([deck_holder_length - (sonar_holder_depth * 2 + deck_depth),
- deck_depth]);}}}}
+ translate([deck_holder_height, sonar_holder_depth]){
+ square([deck_holder_length - (deck_holder_height), deck_depth]);}}}
+ translate([deck_holder_length - oshw_dy * 0.05, 0, deck_holder_width / 2])
+ scale([0.1, 1, 0.1])
+ rotate(v = [1, 0, 0], a = 90)
+ rotate(90)
+ linear_extrude(height = 0.5)
+ oshw();
+ translate([deck_holder_length - oshw_dy * 0.05,
+ deck_holder_height + 0.5,
+ deck_holder_width / 2])
+ rotate(v = [1, 0, 0], a = 90)
+ rotate(90)
+ scale([0.1, 0.1, 1])
+ linear_extrude(height = 0.5)
+ oshw();}
deck_holder();
translate([0, sonar_holder_depth * 2 + deck_depth + 2, 0]){