If you’ve never studied the inside of these clock modules, you may be surprised about how they actually work. A crystal oscillator pulses a relatively large electromagnet. A small plastic gear ...

[Stephen Hobley] has been experimenting with an electromagnetic pendulum in order to build himself a clock. Through the ... which powers two 60-tooth gears responsible for keeping track of seconds ...

causing the drums to rotate and setting the clock in motion. "This is purely mechanical," said Potter. "There's no ...