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Build Your Own Combat Robot

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using sensors to allow<br />

robots to feel, 241–248<br />

using sensors to allow<br />

robots to hear,<br />

241–248<br />

using sensors to allow<br />

robots to see, 241–248<br />

Autonomous target tracking,<br />

253–256<br />

AWG (American Wire<br />

Gauge), 91<br />

AWG copper wire minimum<br />

current ratings, 91<br />

Axle drives, powered, 57–59<br />

Axles<br />

mounting, 54–55<br />

mounting using various<br />

types of bearings,<br />

55–57<br />

supporting, 54–55<br />

wheel permanently<br />

mounted to powered, 59<br />

B<br />

Base-loaded antenna, 174<br />

Basic Stamp, 255, 265–267<br />

Basic Stamp 1 program,<br />

294–296<br />

Basic Stamp 1 program,<br />

sample, 289–290<br />

Batteries<br />

accessible vs.<br />

nonaccessible, 100<br />

Alkaline, 83<br />

alkaline, 98–99<br />

brand-new<br />

rechargeable, 84<br />

conversion factors, 86<br />

discharging, 85<br />

estimating current<br />

capacities in, 91<br />

heart and blood of one’s<br />

robots, 100<br />

installing, 100<br />

lead acid, 92<br />

limiting amount of<br />

current, 72<br />

Lithium Ion, 83<br />

lithium ion, 99<br />

manufacturer’s data<br />

sheets of, 91<br />

measuring current draw<br />

from, 80–81<br />

NiCad (Nickel<br />

Cadmium), 83, 95–97<br />

NiMH (Nickel Metal<br />

Hydride), 83, 97–98<br />

not potting, 83<br />

primary purpose of, 80<br />

purchasing, 83–84<br />

rechargeable, 85<br />

sizing, 93<br />

SLA (Sealed Lead Acid),<br />

83, 93–95<br />

Battery<br />

packs, 84<br />

performance<br />

characteristics, 90<br />

suppliers, 346<br />

Battery capacity basics,<br />

83–91<br />

comparing amp hour<br />

capacities, 86–87<br />

comparing SLA, NiCad,<br />

and NiMH run-time<br />

capacities, 86<br />

preventing early battery<br />

death, 84–85<br />

sizing for 6-minute run<br />

time, 85<br />

voltage stability, 87–89<br />

wrapping up comparison,<br />

89–91<br />

Battery/charger<br />

combinations, drill, 99<br />

Battery chargers, 99<br />

Battery death, preventing<br />

early, 84–85<br />

Battery eliminator circuits<br />

(BECs), 145, 172<br />

Battery power requirements,<br />

80–83<br />

blowing fuses on<br />

purpose, 82–83<br />

measuring current draw<br />

from batteries, 80–81<br />

suitable resistors and<br />

measurement basics,<br />

81–82<br />

using Ohm’s Law<br />

to measure current<br />

draw, 81<br />

Battery types, 92–99<br />

alkaline batteries, 98–99<br />

lithium ion batteries, 99<br />

NiCad (Nickel Cadmium)<br />

batteries, 95–97<br />

NiMH (Nickel Metal<br />

Hydride) batteries,<br />

97–98<br />

SLA (Sealed Lead Acid)<br />

batteries, 93–95<br />

Battle-like conditions, testing<br />

robots in, 82<br />

BattleBots<br />

BotBash is smaller-scale<br />

version of, 11–12<br />

is most popular robotics<br />

event, 7<br />

weight classes for<br />

wheeled, 8<br />

BattleBots-style (radiocontrolled)<br />

machine, 22<br />

BattleBox, 7–8<br />

hazards and weapons,<br />

7–8<br />

Index 359

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