Radio Shack Mobile Robot - Manual (Page 6)

3
Technical Specifications
Body: .062 aluminum - cut, punched, and formed.
Configuration: 3-wheel, front wheel drive, rear wheel steer.
Dimensions: 10" x 10", 5" tall, 2-1/4 lbs.
Payload capacity: 1 lbs.
Wheel size: 3.25" diameter.
Drive Motor: 12 volt DC gear motor, 74 full load RPM, 1.6 amp full load current.
Quality machined wheel coupling and bearings.
Optical wheel encoder for distance measurement
Encoder: 20 counts per revolution - 2 per inch of travel (1/2” resolution).
Motor driver: H bridge - 1 amp max.
Speed control: Pulse Width Modulation.
Controller PCB size: 2.1" x 6"
Steering Motor: Standard size RC servo motor.
Power source: 8-AA cells in removable pack.
Runs on 8 AA-cell batteries for 5 hours or more.
Current draw: 50ma at standstill, 200ma with motor running typical.
Coprocessor: PIC16F84 for motor control.
Expansion connector - 40 pin (2x20) IDC .1 centers.