To help pass the time, [Erich Styger] decided to build a meta digital clock made up of 24 individual ... The master is also able to communicate with the host PC over USB to maintain RTC time.

After building a couple of more traditional clocks over the years, he set his sights on making a completely isolated digital clock that doesn’t rely on external synchronization (well ...

Microchip has combined a chip-scale caesium atomic clock for good accuracy with a ovened crystal oscillator for good phase noise, in a through-hole ...