The first source, called a torsional pendulum, is a special kind of pendulum that twists instead of swings. The second timing source will be the sun. The clock will use the sun to reset itself. The Display We wanted to display natural events, like the sunset and moonrise, while also showing the date as it is seen on a calendar. We had to build a type of computer to keep track of both natural time and calendar time.
Most clocks use gears to track time.
We realized that gears would not work because we needed so many large calculations. So Danny designed a mechanical computer that works like electronic computers. But instead of using electricity passing through microscopic chips, it uses actual levers and wheels. These levers and wheels add numbers each time the clock ticks so the dials on the clock will turn correctly. During our design process, we came up with many different ideas for the 10,000-year clock.