A simple but not trivial Arduino project with four sliders and four rotary encoders to send MIDI CC values to my DAW and better control the performance of my VST instruments.
Schematics and stuff to come, but basically I plugged four linear slide pots to the A0-A3 pins of an Arduino Micro to control the values, and four 24-steps rotary encoders to the D5-D12 pins to select the CC number for each fader.
Then I have a totally overkill 20x4 LCD display which is entirely unnecessary but so gorgeous I couldn't resist. This is also possibly the biggest bottleneck of the project, so you may want to be a little more frugal. It's I2C anyway.