Belshazzar's Clock: A DIY Luminous Timepiece

The author details the creation of 'Belshazzar's Clock', a luminous night clock built using luminous paint, UV LEDs, and a stepper motor. The project utilizes a 100mm diameter duct, 3D-printed parts, and an ESP32C3 microcontroller. Challenges encountered included inconsistent ESP32C3 clone quality and WiFi power consumption issues. Future improvements include aesthetic enhancements and a daylight version using photochromic ink. The project's code is open-source.