Mobile device with color discrimination

A mobile device with color discrimination suitable for producing a physical action in response to the detection of a color on an action surface, said mobile device comprising:

• a mobile body having a first wheel, a second wheel, and a third point of contact with the action surface;
• means for executing the physical action;
• a color detection module attached to said mobile body for producing color detection signals in response to detecting colors on the action surface, said color detection module including
• a broad spectrum illumination source with a source lens, said illumination source for producing a spot of light on the action surface;
• a photodetector with a bandpass filter, said photodetector for receiving light reflected from said spot of light and transmitted through said bandpass filter;
• a second photodetector with a second bandpass filter, said second photodetector for receiving light reflected from said spot of light and transmitted through said second bandpass filter;
• an electronics module for receiving color detection signals and to produce the physical action in response thereto, said electronics module including
• a comparator circuit in electronic communication with said photodetector;
• a second comparator circuit in electronic communication with said second photodetector;
• and
• a microcircuit in electronic communication with said comparator circuit and said second comparator circuit, said microcircuit further in communication with said means for executing the physical action.