My aim during these months will be the prototyping of a machine which could allow to create sounds and alter their audio spectrum, thanks to the conversion of the sound spectrum itself into an actual physical object that can be modeled through the use of the hands. This machine will also incorporate a Stylophone for the generation of sound.
###Electronics
The first board is used to pick the frequency and the tonality thanks to two potentiometers and a seven segments display as visual feedback.
i used eagle to make the schematics and inkscape to laser the board.
Second board used to calculate the pentatonic scale frequencies based on the frequency chosen on the first board.
It's also used to read the hall sensors and move the servo.
MiniHall board - there are 5 little boards with only a smd hall sensor. I used this solution in order to hide the sensor inside the top of the racks under the surface.
download [board] file
Unfortunately i found out that the atmega328 can't play more than 3 notes simultaneously, so i decided to use the MIDI comunication to control the volume of 5 MIDI channels
###The structure
The structure was made of wood. The inner structure is MDF milled with our CNC machine. The outer shell was cutted with the laser machine in order to bend the wood in two corner.
download the [files] here
The top and bottom surface are CNC milled and designed in order to get stuck with the outer coating on the inner structure. In this way i didn't get external visible joints.
Each servomotor is supported by a laserd plywood structure.
In addition to the servo, the structure includes a C-shaped aluminum profile for the vertical sliding of the rack, in order to reduce friction.
download the [files] here
The gears and the racks are 3D printed with our delta Wasp20x40.
I started from a file generated through the site [Involute Spur Gear Builder]. As the goal is to move the pinion of 10cm with a 180 degrees servo motors, the circumference of the gear must be 20cm.
download [.stl] files
![[board]](http://archive.fabacademy.org/archives/2016/opendot/students/171/download/FP/Hall_miniboard.svg){kind=link}