We start this new section of our blog building a funny head for our future bot. As usual, we try to spend the less money we can and to have a nice final result. The idea is to build the head on top of a 2-DOF bracket as the one in the following figure that you can easily found on the market for a few bucks.
The material
Here is the list of the material you need for this instructable. All of them can easily be found either on your waste basket or in your pencil case.
Some construction paper. I used the paper box of cakes that you can
see in this figure.
see in this figure.
A pair of scissors.
A pencil (and probably an eraser ;-) ). A ruler with millimeters scale will
also be of great help.
also be of great help.
And the HC-SR04, your preferred ultrasonic sensor.
A 2-DOF pan-tilt bracket on which we will mount the head of our bot.
And some female-to-male cables (at least four to connect the HC-SR04 sensor).
Draw on the construction paper the following diagram and cut it along the thick lines. Remark that according to the thickness of your paper you should adjust dimensions so that global dimensions are respected.
Draw on the hard paper the following diagram and cut it along the thick lines.
Third step
Fold the cut construction paper along the dashed lines and use the scotch to fix in order to obtain a parallelepiped.
Cut a rectangle of construction paper of the dimensions given as in the following figure. Use the scotch at the border to stick the two folded lead together. Call this part: F.
Fifth step
Use the point of the pencil to make two holes in the upper side of the part F (see previous step). The holes have to be the same present in the HC-SR04 PCB. Finally, using some scotch stick the parallelepiped and the part F together so that part F is centered wrt the smallest face of parallelepiped.
Sixth step
Fix the HC-SR04 to the holes you made in part F at the previous step using two screws and nuts. Place the HC-SR04 so the the pins are upside. Choose some nice colored cables to connect these pins to Arduino. Be inventive! These are the hairs of your bot!
Enjoy!
The head is ready now. You should have obtained something like in the picture below.
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| The final result! |
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