On the testing day our buggy worked properly when we tried to make it follow the black strip but later on something went wrong and it couldnt quiet follow the black strip it had to. According to me the buggy did not follow the black line properly because the range of LDR value we had kept for a condition to become true or false always changed. This happened because the light intensity differs with slight change in the surroundings and with the change in the light intensity the value of LDR also changes. As my group mate(Hani) said we could have had a third sensor which would detect the change in the light intensity of the surrounding and according to that would have changed the ranges of LDR values we had set for conditions to become true or false. Or perhap we could have used some other sensor instead of LDR whose value doesnt change so easily.
Another problem that was visible was the late reaction of the buggy to turn. By the time the buggy could sense that it has to take a turn, it is already off the track. To correct this we can programme the micro-controller in such a way that the moment it has to take a turn, the buggy should pause for a moment and after pausing for a sec or two one of the wheels should rotate in the opposite direction while the other should stay still. This mechanism would keep the buggy on track even if it is responding a little slow at the turns
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