This tutorial shows you how to add an array of four QTI sensors to your ActivityBot.  These sensors can differentiate between dark and light surfaces. With a BlocklyProp program, your ActivityBot robot can use the QTI sensors to follow a black electrical tape line on a light background.

Before you start

This is a bonus tutorial to follow BlocklyProp Robotics with the ActivityBot. 

What's needed

• A fully built and tested ActivtiyBot (#32500) or ActivityBot 360° (#32600)
• A QTI Line Follower AppKit (#28108)
• A 3/4 inch black line on a white surface. Options
  • Print out this line-following tracks PDF on an inkjet or laser printer and copy paper (NOT with photo printing paper and ink)
  • Make a track on white poster board, foamcore board, or a smooth, light floor with black electrical tape

After you finish

You will be ready to combine QTI line following with other sensors for more advanced projects, like ActivityBot 360° Line Following with Color Sensing.