This is my attempt to create a robotic arm that can grab objects from more than one radius from the center. It is also my first NXT/RCX project. It uses 6 motors and it is remotely controlled by Sony's PSP.
The PSP sends messages to the pre-programmed RCX. The RCX sends signals to the NXT through a light sensor by switching the led light on and off. More information about that can be found in the programs. They can be found here: RCX, NXT.
The RCX controls the hand, the NXT controls the other motors.