We have made three robots so far. By now, your library of robotics knowledge is becoming fairly deep. Now, it is time to try something more ambitious. Meet Grunt, an interactive robot that walks on two legs and has his own quirky personality! Grunt is a fictional alien character from a distant planet, with arms and legs like a human's, but with a dinosaur-like head and mouth.
When we build Grunt, we will be taking the mechanical design in a completely new direction. All of the robots we have made so far have used a tank-style drivetrain with either tracks or wheels to move around. Grunt does not rely on wheels to carry him around! Instead, he has a simple walking mechanism that allows him to shuffle around on two feet.
Like the Timmyton from the previous chapter, Grunt has several different operating modes that use his motors and sensors...