PWM pins work the same way across all Arduino boards, so you don't need to go out of your way to buy a Mega if you already have a board supporting PWM. On the Uno, Nano, and Mini, the PWM pins are ...

I have a problem with the pins of arduino Mega and Im pretty sure I do something wrong. This is the example code where I modified the stepPin, steps, speed, and acceleration and it works perfectly.

[Andy] didn’t want to use up 24 pins on his Arduino, so he used a latch to multiplex the lowest 8 address lines and the data lines together. With the 512KB RAM expansion installed, the Mega is ...

The Ultimate Arduino Mega 2560 Hardware Manual is from the same author and the table of contents is about the same as in the first book, but of course tailored to the Mega 2560 board. One difference ...