Features

LED display

Print text
Animation
Use threads to offload commands
Use PWM to set V0

Sound

Output sound to speaker
Amplifier?
Use DMA to write PWM duty
Which clock frequency to use to match 11 kHz audio? 132 MHz?

Rotary encoder

Select functions
Change colors of led

Buttons

Light leds
Switch functions

Sonar

Control LED color/brightness
Control sound frequency