Mr RobotTM
Robots & Microcontrollers for the Future
8822 Trevillian Road, Richmond, VA 23235 USA


Fischertechnik

MOBILE ROBOTS


MR 1

MR 2

The Obstacles Robot:
This robot looks for thigs to bump into and stores this imformation in the interface's memory. This way it can find it's way out of a maze by remembering where an object set in it's path is, and then moves around them.
This is accomplished by two input switches. When one switch is activated the robot then tries to go the other way. Using these two switches the robot can make it's way around obstacles
. Storage Control		 Robot that Follows a Light source:
This model is mounted on the robot base unit. The robot then searches out a light source (e.g. a flashing-light) shining on it. If both phototransistors identify a light source the robot moves towards it. However, the light source must not be moved too rapid, and must move smoothly. If the model looses contact to the light source, it begins a new search in the stop mode.


MR 3

MR 4

Mobile Robot Edge Detection:
This mobile robot is set up to detect the edge of it's environment and stop before it would fall off. The two arms in front of the model have limit switches (digital inputs) that signal the interface when that arm detects an edge. The robot uses the information from each switch to know what direction to backup and turn. The robot is then programmed to reverse itself and start again until it finds another edge where the process is repeated. mr3		 Mobile Robot base Unit:
This model has two motors, one for each drive wheel giving the robot a zero turning radius. The model is powered by a 9vDC battery and has it's own on/off switch. Other switches inside the model are set up to count pulses from the drive axles of each wheel so that the interface program can have feedback from each drive wheel. From this base unit other sensors can be added so that the model can be made to do different tasks.

MR 5


Line Tracer Mobile Robot:
This model can follow a 1 CM black line on a white surface. The limiting factors of the mobile robot following the line is the amount of ambient light in the room and the strength of the light bulb on the robot. The two phototransistors recognize the path as a dark strip and background as a light area. The program then uses this information to control the motors of the drive wheels to make the robot follow the black line.