The Pocket State Calculator allows jugglers to calculate and understand siteswaps on the go.

Whilst taking a break from my juggling notation research, I decided to try and clarify the underlying rules of the popular notation system “siteswaps” by simulating states with leds. My video about it was picked up by juggler and electronics engineer Sylvain Garnavault, who offered to turn it into a pcb. Right now we are collaborating on turning this into a product that jugglers can buy.

The video of my prototype: