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Update: To make FritsLDR stand the ultimate test, I wanted it to navigate with light only.. but using a standard old fashionable light bulb instead of a smart & fast display of super bright LED's to track in front.. .. and then it had to navigate at a kitchen table.. where all lights in the cieling was florescent lamps :) And it can be done. Quite easily actually! So this concludes this for me; It CAN be done - you can navigate by visible light, and you can make your own sensors with ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/robot-navigating-by-visible-light-alone