Do you want to create your own robot? Then this is your best guide. This is a smart robot controlled by an Android app so easy to build.

This robot car follows voice command with the help of mobile for serial communication.

How To Make a Stepper Motor Speed Controller using Arduino and L298 Motor Driver

A4 size CNC 2D Plotter using Processing, Arduino, L298 and Stepper Motor | A4 CNC Plotter

This is part of a Lego themed series of tutorials.