The base of the clock is formed by a slick black PCB that holds an ESP32. The segments are driven through a set of 74LV595 shift registers to keep the required number of GPIOs to a minimum.

The strips are two halves of an adhesive 60 LED/meter run that have been stuck together back to back so that the lights are staggered for seamless coverage.

The basic LED on the $50 Smart Clock Essential only tells you the time and temperature, but you can still ask Google Assistant to set an alarm. By Ben Patterson Aug 31, 2020 8:30 am PDT Image: Lenovo ...