IoT Based Internet Clock using Dot Matrix Display

Updated: Jul 2, 2021

In this tutorial we are going to do is a simple connected clock that displays, on the MAX7219 LED matrix, the time, picked with NTP from web, and fixed Message for scrolling display. The display light also changed based on the light that the photoresistor measures so even if it's day or night you can read time properly and energy saver.

Circuit Diagram