built by Kelly Snow

Target Environment Locomotion Method
Indoors 3 Wheels
Sensors / Input Devices Actuators / Output Devices
7 Sharp IR sensors
2 IR wheel encoders
40KHz sonar
2 Geared DC motors
R/C servos
Control Method Power Source
Autonomous Battery
CPU Type Operating System
Motorola HC11 None
Programming Lanuage Weight
Assembly N/A
Time to build Cost to build
URL for more information
Thomas is a fully autonomous mobile robot constructed for the Machine Intelligence Lab at the University of Florida.

A) Body -- Constructed from sheet aluminum, Thomas’ body is very sturdy and provides a faraday cage for Thomas’ drive motors

B) Drive -- Provided by 2 geared DC motors

C) Controller -- Motorola 68HC11E9 Micro-controller with RAM upgraded to 64k battery backed up static ram, and memory mapped I/O.

D) Sensors -- 7 modified Sharp IR sensors for object detection from 0 - 24 inches. 2 IR emitter/detector pairs used as wheel encoders for distance traveled measurements 1 40kHz sonar emitter/detector mounted on a pan/tilt servo head for time of flight distance measurements from 2 - 8 feet.

E) Power -- Power is supplied by two AA 8 packs nicads which provide approximately 10Vdc which is then regulated down to 5Vdc.

F) Programming -- Originally programmed in 6811 assembly, Thomas is also capable of being programmed in IC11.

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