The demos were created by developer Simon Gladman in Swift.
Here's a silly experiment - using a homemade harness to use an Apple Pencil as an electronic scale. The Pencil is super sensitive, but not terribly accurate.
"PencilScale requires some additional special hardware that I've had to create myself using the advanced manufacturing facilities in my kitchen. The custom harness is in two parts: a base unit and a platform that sits on top of the Pencil. Luckily, Apple actually supplied the necessary raw materials in their packaging."
Here's a more advanced version of my experimental image processing app using the Apple Pencil as a controller for the fine setting of parameters to Core Image filters.
Here's another experiment using the Apple Pencil as a controller: an Audiokit powered synth using:
* The Pencil's horizontal position on the screen to control frequency
* The Pencil's vertical position on screen to control the modulating multiplier
* The Pencil's altitude angle to control the carrier multiplier
* The Pencil's azimuth angle to control the modulation index