This project consisted basically of two parts:
-Schematic design:
As shown in the images below, I used 132 LEDs: 60 of those were yellow, another 60 were green and 12 were red. Each colour represents seconds, minutes and hours, in that order. I had to use 15 shift registers in order to address each LED. The Arduino MEGA is powered by a LiPo battery and receives the clock signal from a tinyRTC.
-PCB design:
In order to place all of the LEDs in their right position, I had to desing a template on Solidworks and import it to Altium as a mechanical layer. Because of the number of components used, I had to place some of them on the bottom layer.
