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So after lots of hard-work, frustation, time, spending money on wrong parts; I built a robot. Its a Photovore based on NPN transistors. when its LDRs are pointed towards the floor, it becomes a line follower. i used the following parts- 1.) 2 X 2N3904 NPN transistors 2.) 2 X Solarbotics GM9s 3.) 2 X Cds LDRs 3.) 2 X Wheels 4.) Battery holder
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/trace-e