2. Materials and Tools

Beyond the Polou 3pi robot + USB programmer + cable combo, you will need a few other materials for this project. You only need the materials listed under the “required” section to make the wall follower work, but the optional headers make it easier to reconfigure your 3pi with other sensors later by allowing you to unplug your distance sensors.

Required

• 2 Sharp GP2Y0A21YK0F distance sensors
• 1 140-piece wire kit
• Double-sided foam tape
• a Soldering iron and solder

Optional

• 1 0.100" (2.54 mm) female header: 2×7-pin, straight
• 1 0.100" (2.54 mm) female header: 1×2-pin, straight
• 1 0.100" (2.54 mm) breakaway male header: 2×40-pin, straight
• 1 0.100" (2.54 mm) breakaway male header: 1×40-pin, straight