Resources
References
For datasheet of the components used, visit the home page and find the corresponding links under the Major Components Used section. You can find the datasheet in the vendor websites.
MCU Reference Manual: http://pages.hmc.edu/brake/class/e155/fa22/assets/doc/rm0394-stm32l41xxx42xxx43xxx44xxx45xxx46xxx-advanced-armbased-32bit-mcus-stmicroelectronics.pdf
FPGA Datasheet: http://pages.hmc.edu/brake/class/e155/fa22/assets/doc/FPGA-DS-02008-2-0-iCE40-UltraPlus-Family-Data-Sheet.pdf
Inspiration
Some mind-bending clocks: https://www.pinterest.com/pin/2392606021835477/
https://www.ebay.com/itm/231654009746