Build Your Own Combat Robot

mechanical, 160
modifying R/C, 281–283
RC, 160
RC (radio-controlled),
135, 136–137
Shafts
getting torque from, 58
securing gears to,
122–124
Sharp GP2D02 Infrared
Range Sensors, 245
Sharp GP2D05 Infrared
Proximity Sensors, 245
Sharp GP2D12 Infrared
Range Sensors, 245
Sharp GP2D15 Infrared
Proximity Sensors, 245
Shear strength, 199
Sheave defined, 121
Sheet metal
screws, 200
stainless steel, 187
Sheets
battery manufacturer’s
data, 91
data, 80
Shelf life, rechargeable
batteries and, 85
Shielding, antennas and,
173–174
Shop tools
gaining knowledge
in use of, 36
larger, 37
safety in use of, 37
Show, finally the, 325–327
Shutdown feature known as
failsafe, 155
Signals
data checksum, 168
radio systems and loss
of, 179
Single strand roller chain, 115
Sites
official first Web, 15
robot competition
Web, 344
Six-legged hex-walkers, 43
Six-minute capacities,
comparing batteries with
similar, 89
Six-minute run time, sizing
for, 85–86
Sizing batteries, 93
Sketches, making, 316
Skid steering, 25
SLA run-time capacities,
comparing, 86
SLA (Sealed Lead Acid)
batteries, 83, 93–95
have lowest internal
voltage drop, 88
manufacturers, 95
Slop, gear, 122
Slots, wheel assembly with
pre-cut, 59
Smaller robots, 50
Smentowski, Jim, 86
Soccer, 10–11
Softer steel alloys, 188
Software algorithms,
advanced, 301–302
Software, CAD (computer
aided design), 110, 308
Soldering
connectors, 339
PCBs (printed circuit
boards), 338
for robots, 337–339
wires, 339
Solenoid relays defined, 130
Solenoids, starter, 131
Solid core wires, 92
Solid-state logic, 137–139
SP (single-pole) relay, 128
SPDT (single-pole
double-throw) relay,
128, 251
Spear bots, 233–236
spear design, 233–236
strategy, 236
Specification, sumo ring,
280–281
Speed
motor, 65
no load, 63
Speed control, variable,
139–155
commercial electronic
speed controllers,
143–155
controlling speed =
controlling voltage, 140
Speed controllers, 172
4QD, 152–153
motor, 26
Vantec, 149–152
Victor 883, 147–149
Speed controllers, commercial
electronic, 143–155
hobby ESCs, 143–146
Speed, controlling, 140
FET (Field Effect
Transistor), 142–143
PWM (pulse width
modulation), 140–142
Speed reducers, 104, 123, 124
commercial, 123
Speed reduction, 104, 106
Spike strips, 8
Spinner bots, 220–222
spinner design, 221–222
strategy, 222
Spinners, vertical, 224–226
strategy, 226
vertical spinner design,
224–226
Index 377