"Their findings show that AI systems, at best, got clock-hand positions right less than a quarter of the time. Mistakes were more common when clocks had Roman numerals or [stylized] clock hands." ...

Neodymium magnets and hall effect sensors are used for tracking the position of the hands as the clocks move, with the magnets embedded into the clock hands. As for communication, rather than use ...

[Doug Paradis] found a simple way to use dials instead of hands on a clock. Actually, that’s pretty much the entire hack… use dials instead of hands. He grabbed a battery-operated clock ...