I'm about to modify my photovore to also give it line following ability, and have a couple of questions. I should mention I will be using LDR's.
1) What is the best colour LED to use to shine onto the floor, white, red or infra red?
2) Is it best to have the LED in front of the LDR, or to the side?
3) If to the side, should the LED be inside or outside the LDR?
4) Should the LDR be slightly lower than the LED or vice versa?
Thank you for your help.