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|Target Environment||Locomotion Method|
|Sensors / Input Devices||Actuators / Output Devices|
|Vector VX2 compass
IR line following sensors
CDS light sensors
wheel speed sensors
Sharp IR detector
I/O Menu buttons
|Modified R/C servos
IR transmitters for sensors
IR data transmitter
16x2 line LCD data display
|Control Method||Power Source|
|CPU Type||Operating System|
|Time to build||Cost to build|
|URL for more information|
|Betty is the first prototype of our mobile robot. It has a variety of sensors and utilizes our Finger Board 68HC11 embedded processor board for control. The robot is fairly small, it stands 4.25" high by 4" in width. The construction is based on three 4" diameter boards that are stacked on
top of each other. The first layer holds the modified R/C servo drive units and nicad batteries. The internal servo electronics were removed and the motors are driven by a L293 H-switch chip. Future prototypes may use small gear-head motors for greater speed. Most of the electronics are contained on the middle printed circuit board. The processor board is located in the center with the various external sensors surrounding it. The top layer holds the LCD display and Vector compass unit. The sonar driver circuitry is also located on the top layer, yet to be implemented.
Our next prototype will try to integrate more of the electronic circuitry on a single board and may have possible enhancements such as wireless data transmitter, wireless video transmitter, sonar, PIR detector and smart charging battery system.
Other Hi-resolution images of Betty and technical details can be found on our web site.
Finger Board - 68HC11 based controller