122-27400 Parallax Inc, 122-27400 Datasheet - Page 22

• Manufacturer Part Number: 122-27400
• Description: MANUAL FOR SUMOBOT
• Manufacturer: Parallax Inc

Specifications of 122-27400

• Accessory Type: Manual
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: SumoBot®
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

Page 12 · SumoBot – Mini Sumo Robotics
A voltage level is measured in volts, which is abbreviated with an upper case V. The
SumoBot PCB has sockets labeled Vss, Vdd, and Vin. Vss is called the system ground or
reference voltage. When the battery pack is plugged in, Vss is connected to its negative
terminal. Vin is unregulated 6 volts (from four AA batteries) and it is connected to the
positive terminal of the battery pack. Vdd is regulated to 5 volts by the SumoBot PCB’s
onboard voltage regulator, and it will be used with Vss to supply power to circuits built
on the SumoBot PCB’s breadboard.
The control signal the BASIC Stamp sends to the servo’s control line is called a “pulse
train,” and an example of one is shown in Figure 2.3. The BASIC Stamp can be
Only use the Vdd sockets above the SumoBot PCB's breadboard for the
activities in this workbook. Do not use the Vdd on the 20-pin App-Mod
header.
Figure 2.1: Milliseconds and Microseconds Details
Figure 2.2: SumoBot PCB Voltage Labels
1
µ
1
s
ms
=
Vss = 0V (ground)
Vdd = 5V (regulated)
Vin = 6V (unregulated)
1,000,000
=
1000
1
1
s
=
s
1
=
×
1
10
×
10
3 -
s
6 -
s