Just as moths are attracted to lights, so is the following robot with the Mothbot name by Instructables member natantus. The Mothbot is a neat introductory robot project that is inexpensive to make and has lots of potential.
The original design uses two light sensors to determine the direction of a light source, then turns to meet and travel towards the source powered by two continuous-rotation servos and large wheels.
We really like this project due to the level and clarity of instructions, which makes it easy for almost any beginner to make their own interactive robot. To get started, visit the robot's project page. And for more, we're on facebook, twitter and Google+, so follow us for news and product updates as well.
Looking to detect changes in light levels? Don't fool about with irregular light-dependent resistors. Instead use our LIGHT: light sensor module with the TEMT6000 light sensor which gives consistent and repeatable readings even between different units. Simple to use and versatile for many applications. For more information and to order, click here.