Feb.26 Line Follower refinements and test

From observing a HTL class working on their line followers (in Lejos)

Robot:
light sensors closer to "floor" have less interference
if sensors are not close to the wheels then a small angle still has a longer radius
ie. sensor make a bigger turn  away from the line than expected.
This is true of the basic tribot, which has a third motor the middle (for support)


Algorithm:
Calibrate the light sensors so the background can be a brown or gray table top. 
The color blocks on the new track can confuse the robot if light sensors are not calibrated right
Slow down in curves
Try the direction it was turning in first if the line is lost

Testing:
straight line
test circle 
line the curves back and forth


Next application:
Maze made up of black lines