Robot Building for Beginners, Third Edition

„„„„„„„„„A

Acrylonitrile butadiene styrene (ABS), 361
Alkaline 9 V batteries, 77, 84
Alligator clips, 91
Alternating current (AC) vs. direct current (DC), 25
Aluminum-oxide grinding-stone accessory, 355
Analog meters, 32
Atlanta Robot Vacuuming contest, 424
ATmega644 microcontroller, 3
Automatic Street mailbox robot, 423
Autonomous-robot contests, 423
Atlanta Robot Vacuuming contest, 424
Central Illinois Robotics Club, 425
Chibots, 425
Dallas Personal Robotics Group Roborama, 425
Robot Sumo, 423
Seattle Robotics Society Robothon, 425
Trinity College Fire-Fighting, 424
Autoranging, multimeter, 35, 37

„„„„„„„„„B

Balanced brightness-sensing circuit, 182
current-limiting resistor, 185
inability to balance, 189
part list, 183
photoresistors, 183
resistance, 184
solderless breadboard, build, 188
test point evalution, 186
variable resistor, 188
voltage calculation, 185
voltage divider, 188
Banana test lead, 147
Batteries, reversing 9 V batteries, 430
BEAM robots, 409
Bending metal, 349
Bicolor LEDs, 117

Bipolar transistors, 433

brightness comparator circuit, transistors

current-limiting resistors, 220

current-limiting transistors, 220

solderless breadboard, 222

wiring diagram, 220

multimeter, 209

diode test, 212

testing, 210

NPN transistor, 214

schematic diagram, 218

test circuit, 218

PNP transistors, 214

reverse connections, 216

schematic diagram, 215

test circuit, 216

Blue masking tape, 63–64

Brighter-side indicators, 70

Brightness balanced LEDs

schematic diagram, 178

solderless breadboard, build, 179

Brightness comparator circuit, 195

connected and unconnected wires, 196

diagnosing problems, 199

labeling parts, 196

LED indicators, 199

parts list, 197

photoresistors, 197

solderless breadboard, 197

wiring diagram, 195

Buttons. See Pushbuttons

Buzzers, 416

„„„„„„„„„C

Cadmium-sulide photoresistors, 179, 342, 388

assorted, 181

encapsulated, 180

variable resistance, 181

Index