This project uses an LED matrix module and a real-time clock to display the time and date in scrolling text (Figure 21-1).
FIGURE 21-1 LED matrix clock.
When the button is pressed, the clock toggles between displaying the time and displaying the date. The time is automatically set from your computer’s clock when uploading the sketch if the button is pressed during the sketch upload.
To build this project, you will need the following:
Figure 21-2 shows the schematic diagram for the project, ...