Many times I have Googled for "Arduino Robot" in hopes of finding a robot to build. I end up finding many versions of a obstacle avoiding robot that uses either an infrared or a sonar range finder sensor mounted on a servo to detect objects in its way while randomly roaming the area around it. The problem with this robot is it is expensive and very advanced in some aspects for a "first robot" to make with an Arduino board. The cost of a servo is about $10, and a range finder sensor runs from about $10 - $30.
This instructable will cover how to make a light seeking robot (Photovore), and some robotics and motor control basics. This robot can be built with parts found at the nearest Radio Shack, if you already have an Arduino board and a robotic base. The cost for a five pack of CdS cells (Light dependent resistors) cost $2.99 at Radio Shack. and a 15 pack of NPN transistors (very useful later on) are also $2.99. Of all these parts, we will only need two NPN transistors and two CdS cells. Please remember, this is my first instructable.
I really appreciate criticism, comments, questions, and suggestions.
Your feedback will help me improve this instructable and future instructables created by me. Check out our website Note: by posting any pictures in the comments, you are giving me full rights to the posted image (disclaimer to post robot pictures on the last step.)