Robot Building for Beginners, Third Edition

CHAPTER 14 ■ VARIABLE RESISTORS Unfortunately, the user has the ability to turn the potentiometer all the way down to no resista ...

CHAPTER 24 ■ BODY BUILDING Eight #4 screw-size nylon flat washers (same washers as used on the motors) Four 1-inch long spacers ...

CHAPTER 14 ■ VARIABLE RESISTORS Power up! Turn the trimpot dial with a small screwdriver and observe the brightness of the LED. ...

CHAPTER 24 ■ BODY BUILDING Installing the Circuit Board When installation is complete, the mounting hardware for the circuit boa ...

CHAPTER 14 ■ VARIABLE RESISTORS In this circuit, an LED (D2) has been connected to the third lead of the trimpot (R2). The maxim ...

CHAPTER 24 ■ BODY BUILDING Here are the steps for installation: Place a nylon washer on the 1½-inch long #4-40 screw. This wash ...

CHAPTER 14 ■ VARIABLE RESISTORS ■ Note Thorough readers with good memories will dredge up my advice not to purchase or use compo ...

CHAPTER 24 ■ BODY BUILDING A nutdriver looks like a screwdriver, except a nutdriver’s center is hollow and the tip is shaped to ...

CHAPTER 14 ■ VARIABLE RESISTORS Like potentiometers, photoresistors are available in a variety of resistance ranges and physical ...

CHAPTER 24 ■ BODY BUILDING Carving Out a Window in the Container Lid The Ziploc container comes with a blue lid. Technically, th ...

CHAPTER 14 ■ VARIABLE RESISTORS Remember when you had to choose a resistor size to compromise between LED brightness and battery ...

CHAPTER 24 ■ BODY BUILDING It might be beneficial to attach some clear plastic, like a piece of an overhead transparency, into t ...

CHAPTER 14 ■ VARIABLE RESISTORS Part List for Balanced Brightness-Sensing Circuit -- – 9 VDC power supply R1 – 470 W resistor ( ...

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

CHAPTER 14 ■ VARIABLE RESISTORS Because of the balancing potentiometer (R1) and the striking contrast of the line on the floor, ...

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 14 ■ VARIABLE RESISTORS Current-Limiting Resistor In Figure 14-15, R1 is called a current-limiting resistor. Because all ...

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

CHAPTER 14 ■ VARIABLE RESISTORS Determine the amount of voltage being used in the path. V at beginning - V at the end = total ...

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