Research:

Idea 1:

This is a design of a Midi Controller using an Arduino, however the faders have a very short travel distance, there are no toggle switches which could be used to turn on ‘Single Track’. There also isn’t any ventilation for cooling in case the Arduino heats up.

Idea 2:

This design has the toggle switches compared to the previous idea along with more travel distance of the faders. However, the design of this idea is more of a cube where as the general DAW (Digital Audio Workstation) Controller is usually in a rectangular cube design. There are also extra knobs compared to faders.

Arduino:

Mega 2560 Uno R3 Nano V3
Price $21.24 $16.97 $8.33
Analog I/O 16 8 8
Digital I/O 54 14 14
MIDI over USB? No No No

The above table shows the comparison of the 3 models of Arduino boards with their price, their available Analog and Digital I/O and if they support MIDI over USB. All 3 boards do not have MIDI over USB however, there are methods to load custom firmware to allow MIDI over USB using the HIDUINO repository found on GitHub. The Mega 2560 has the most Analog I/O and Digital I/O available therefore, I will choose the Mega 2560 as if I chose the other models, I would definitely require a multiplexer (4051) as both slide potentiometers and rotary potentiometers are analog and there would be 8 of each so it would not meet the requirements.

3D Modelling:

The below model is the design I have finalised with as it is in the design structure of the SSL UF8, has 8 faders as per the requirements, the toggle switches have ON-OFF-ON mode, the knobs are assigned to each of the fader channel and it also includes a passive mixer with 8 1/4 inputs on the back connected to the faders, with has a 1/4 output and a headphone jack for monitoring.

Sketching:

Circuit Attempt:

I attempted to make a circuit to using the Tinkercad Circuit Design however, I did not have the right components to complete the circuit. There are 8 potentiometers, an Arduino along with a multiplexer.

Prototype:

This is a prototyped design made out of cardboard showing the dimensional aspects of the system along with holes to display where the components will be placed.