Robot Building for Beginners, Third Edition

CHAPTER 25 ■ Chapter 25: Launching the Line-Follower This chapter begins with last-minute checks followed by a qualifying run of ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER If only the headlights or tube LEDs don’t light, it could be that one or more of the LE ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER If the indicator LEDs are lighting up the opposite way, you can either start calling th ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER Having a motor spin backwards is the most common mistake in building this robot. It’s c ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER I cut a hole in the center of the paper with an ordinary paper punch. The switch bushin ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER With the line-following switch in the center (off ) position, place the powered-on (ye ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER If the headlights and sensors are too near the floor, only fringe amounts of light (if ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER The other two jumper leads should be hooked to TP1 and TP2, respectively. If you didn’t ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER The results of these experiments are not applicable if you lift up the robot from stand ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER The lower resistance of the photoresistors on the right side has a voltage-reducing ef ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER The first frame shows the robot perfectly centered over the black line. Both sets of se ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER The robot proceeds in the same manner as it did for following a dark line. The vital di ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER Solving Steering Problems If the robot is struggling to complete certain turns, there a ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER Potential Improvements Line-following robot: Several potentially beneficial changes to ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER Be sure to place the diode so that the anode (plain end) connects to the power switch a ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER Improving Line-Following Cadmium-sulfide photoresistors react fairly slowly to changes ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER In the first frame, the right LEDs are lit. Since the robot is following a dark line on ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER There’s a problem, though. Check out the position of the right wheel at the time the ri ...

CHAPTER 25 ■ LAUNCHING THE LINE-FOLLOWER Figure 25-13. Left to right: Sandwich, Blue Sandwich, and Red Sandwich Final Bow I hope ...

CHAPTER 26 ■ Chapter 26: Smoother, Smaller, Cheaper Sandwich uses a “preprogrammed” chip and large through-hole parts so that th ...