Robots

Micro Rover! A tiny robot with differential steering and a single front bumper.
A fast but flawed line follower in search of a high speed line tracking sensor/algorithm.
Miniature R2D2: What you get when you don't feel like building your DDK and want to see the Micro-scout go.
A rack & pinion wanderer. One of my first robots and maybe still one of the most fun to watch. No writeup, though.
The #5115 9v Battery Box is the brains of this rover. No, not a hollowed out battery box with a CPU, just 9 volts of power and some clever mechanics. It's the Rock Stupid Rover! All it really needs is a technic BURP for decoration.

Sensor Constructions

Train axle counter: Identify short and long train cars with a simple light sensor arrangement and a lot of NQC.

Yet Another CdS Light Sensor: The interesting bit here is the LEGO electrical connector. Or maybe you're looking for the Radio Shack part number?

Software

VLL send implementation for legOS: Program your Code Pilot or Micro-scout using an RCX and a light sensor.

Raytracing?

Or maybe you were looking for the raytracing.
[Ben Jackson's Home] [LEGO Raytracing Home]