By using "Dremel circle cutter" cut two plastic circles

177mm Diameter for pressure sensitive surface

155mm Diameter for bottom base

In my case I build my own circle cutter

check video for details https://www.youtube.com/watch?v=D8kZFAhsS1g

Electronics

Just duplicate my circuit analogously to hi-res pics ;)

I will update this page with schematic.

IR distance sensor

Drill hole with drill then by using file make it rectangular.

Insert R distance sensor connector in rectangular hole with super glue.

Done! Upload code and have fun. 

Code is coming on next week.

Thank you for watching!

Align servo like on the picusing a ruler and pencil rod

Modify servo for continuous rotation

Take apart servo and remove small tab from the large gear

Make the following setup

Upload a code to arduino with myservo.write(90);
Then stop the servo by rotating pot
Glue servo shaft with small amount of super glue.
Do not insert pot shaft as it was before. just place pot diagonally into servo cavity.
Assemble servo.

RC servo to base mount.

Draw the next drawing on a bottom base

Align servo like on the picusing a ruler and pencil rod

Super Glue it