In the end, he made a number of circuits, including an LED clock with the LEDs on the glass itself, and even attempted leading the community in making a glass keytar. The latter didn’t work ...

Using a 555 calculator, he designed a clock circuit that would run at 11.99 Hz ... enough to interface this with an oscillator, an IR LED, or a laser for long-range control.

Clock and Data Recovery (CDR) circuits are essential components in ... Recent advancements in CDR technology have led to the development of reference-less and frequency detector-less circuits ...