CHAPTER 6 ■ ROBOT LINE-FOLLOWINGSandwich Body
I confess that Sandwich wasn’t the first line-following robot I built for this book. The earlier model
(see Figure 6-17) is good, but is more difficult to build. It has an aluminum base and bracket that have to be
cut to size. Also, the sensors are exposed in front and bend every time the robot smacks into something.
The electronics, wires, and gears are also exposed, which makes picking up the robot a delicate endeavor.
Figure 6-17. Wavy, the predecessor of Sandwich
Using a consumer storage container solves all of those problems. For Sandwich, I chose a reusable/
disposable square 2.5-cup plastic container from Ziploc (see Figure 6-18). Plastic containers are lightweight,
inexpensive, easy to drill, and available at local grocery stores.