I define a 28 bit counter. The bMKR_D array is the digital ports for the Arduino and I’m using pin 6 and 5 as an output and an input, respectively. The assign statement says, in English ...

The Uno also has a limited number of pins, making it difficult to work with when the project requires plenty of input and output components. However, these two areas are where the Arduino Mega shines.

To get started with learning Arduino, you'd first need to have the essential ... which primarily differ in size, GPIO pins, and computing power. The classic UNO is the ideal choice for beginners ...

Then, chances are you already know what an Arduino is ... Additionally, you'd want a Nano if you need more analog pins or have budget restrictions.