The Arduino Nano, compared to the Uno ... and adjust the brightness of the LED matrix. There's also a second button on the clock that displays the current day and date when pushed.

The Arduino Nano Connector Carrier is a compact add-on board designed for the Arduino Nano boards to allow easy connection to ...

Control is via an Arduino Nano, with a few push buttons and a 16 x 2 LCD display for user feedback. Often, completing a first build will reveal all manner of limitations and drawbacks of a design.