Pimoroni Skywriter HAT wav you can even use it

you can even use it to program AVRs (it's a bit slow but works

There is also 8 GPIO pins that can be used for stuff like lighting up small LEDs or reading buttons

As of August 31

Use it to control your presentations like a Jedi

Pimoroni Skywriter HAT wav you can even use itUse this 3D interface to sense things floating in the air over it. Detect swipes and the motion of your hand with X, Y and Z positions. Skywriter HAT uses electrical near field 3D sensing to generate positional data and detect common gestures like flicks and taps. Use it to control your presentations like a Jedi, make a theremin to amaze and annoy all, or make a lock controlled by a magic spell! Features Electrical near field 3D gesture sensing 4