This is the fourth evolution of brick sorters! This time sorting 10 types of bricks: 5 colors and two sizes. You can simply throw a set of bricks into the sorter, and the machine will handle the rest. Compared to sorter #2, this one is more reliable and more functional too. This robot uses both...

This robotic arm combines the power of the RCX and the NXT. The robot turns on its stationary base while grabbing objects around it. The RCX and NXT talk to each other by sending light pulses with light sensors. The RCX acts as the on board master, and it receives infrared control messages from a...

The RCX robotics set has many so-called studded pieces: bricks with the well known LEGO studs on top. The NXT uses primarily studless pieces: beams and connectors without studs. Both type of pieces have their advantages, but building with these different pieces requires different building skills. Before migrating to the NXT system, I decided to...

Second in the series of brick sorters is this machine, which sorts black, grey and white bricks and seperates big from small bricks. Bricks are thrown into the brick store, go down to the conveyor belt one by one, and are put into one out of six bins on a rotating platform. Each time I...

These remote control designs can be used for RCX remote communication. One design resembles a ‘steering wheel’, while the other looks more like a common joystick. Click to download the joystick source code and the steering wheel source code.

This robot turned out to be the first in a series of climbing robots. The primary function is simple: climb straight up between two vertical walls. Pretty boring, but amusing enough to get 600,000 Youtube views. I created it as part of a “community Contest” in the legacy RCX MINDSTORMS forums. The goal was to...

This car is a combination of the RIS 2.0 set with several parts of the #8421 crane set. The back wheels are driven by one motor, which also makes an ‘engine’ run. A motor in the front allows for steering using a rack-and-pinion steering mechanism. A touch sensor in the front detects a bumper press...

This is just a fun little model designed to try out some gearing functionality. It couldn’t turn very well due to it’s tyre construction, and the lifting mechanism resolves this problem. It features the Lego Speed Computer as a rotation sensor. This vehicle was designed in November 2006.

This railway crossing lowers the barriers when the light sensor detects that a train is approaching. After that, the bridge is raised, allowing the train to move along. The reverse occurs after a given amount of time — when the train has passed by. This construction was designed in May 2006.

A robot that sorts LEGO bricks is possibly one of the most popular MINDSTORMS projects. They’re interesting to build and to watch when they’re sorting bricks! This is the first working brick sorter that I designed, and it was inspired by ” brick sorter 3” by fellow brick sorter builder Philo. This robot was designed...