DC Motors - More on these general purpose motors

Servo Motors - How servos work and effective control.

Stepper Motors - Understanding and programming Stepper Motors.

Analog and Digital - A to D converters

Light Sensors - Uses, potential divider circuit

Using the Sharp GP2D02 - Connecting this proximity sensor and reading data into the BasicX

Build an Obstacle Avoiding Robot - Using a Robocore, GP2D02 and Lego