Replacement controllers for slot car racing

replacement-controllers-for-slot-car-racing

That blur on the right is a car racing into the frame. But look around the rest of the image and you’ll see the area is littered with extra hardware. [Matthew], [Doug], and [Barry] have been hard at work adding extra functionality and replacing the original controllers on this Scalextric slot car setup. So far it looks like their build log has not caught up with all the work they’ve done. We’re hoping to learn more details as they have time to write about them (this is coursework at University so we’re sure there’s a lot on their plates). But for now there are several videos and a gallery of images to drool over.

The cars are controlled by the voltage level in the track. The team replaced the stock controllers with a Raspberry Pi. It manages that voltage using Pulse-Width Modulation via MOSFETs. This allows the races to be automated but also makes it simple for a human operator to use just about any input device imaginable to control the cars. For good measure they also added a lap counter that uses an IR LED and detector to sense when a car passes the finish line.

After viewing several of their videos we think the goal of the project is to log the fasts times without sending the cars flying off the tracks during the turns.

Drop everything and build this go-kart right now!

There are awesome projects, and then there are things that make us drool on the keyboard. We just got done wiping up our mess after seeing this go-kart which uses four hub-motors as direct drive wheels. We’ll admit, this is more artwork than a hack as these guys are mechanical engineers and know what they’re doing. But how could we pass up sharing something like this?

The design is smaller than any of the other go-karts we remember seeing. The low-backed pilot seat is the biggest part, with a cubby-hole beneath it for the batteries and control hardware. Each of the hub-motors was hand wound and reading through the related blog posts it seems this was a huge and painful part of the build.

So it’s pretty fun to watch these guys tear up the hallways of one of the engineering buildings at MIT. But the footage of a two-kart race up a spiraling parking garage in the middle of the night is absolutely delightful. You’ll find both videos embedded after the break.

[Read more...]

Racing with Dyson’s spare parts

When it comes time to unwind at the Dyson design facility these engineers know how to do it right. Recently, the company challenged their engineers to a grown-up version of the Pinewood Derby in which they raced their own cars powered by a Dyson motor.

The video after the breaks shows a large collection of these time trials on a track made from upturned wooden pallets. Most of the vehicles are made from parts which we don’t recognize. But some of them are very familiar like our favorite hand dryer ever (seen above) and the iconic goldenrod manifold from the Dyson ball vacuum cleaner.

The course ends abruptly, as you can see in the last run of the video. There is one entry that included a human rider and he seems to be going nearly as fast as the riderless carriages are. The video cuts away before he hits the wall, but we can’t image he had the time to include brakes in that design.

[Read more...]

Maze-solving robo mouse

Looking for something to build that will be challenging and interesting to laypersons at the same time? Take some inspiration from this maze-solving robot mouse. It take the idea of a line-following robot, and makes it infinitely more cool. The tiny rover uses sensors to map out a physical maze. Once it figure it out, you put it back at the beginning for a speed run to the finish. We’ve embedded the video below showing the whole process. Looks like the speed-run is completed in just under five seconds.

Now that you’ve enjoyed a virtual mouse in a real maze, check out a real mouse in a virtual maze.

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$500 Craigslist car competes against $400,000 race car…

…and wins. Well, 3rd in class, but still surprisingly well for such a cheap entry. This is truly a show that with enough elbow grease and headlight fluid anything can be accomplished money just makes it a ton easier.

Everything from the roll cage to the 5 minute gas tank fix was fabricated by [Bill Caswell]. Well — fabricated is a rough term for duct tape at that point, but this is still an awe-inspiring and truly motivational story for any hacker and car enthusiast alike.

[Thanks TJ Walker]

USB accelerometer controller

As you can see above, there is no wiimote in that accessory steering wheel. There is, instead, a home-made accelerometer controller that connects to the pc via USB. Based around a PIC 18F2550 and a 2 axis accelerometer, this device is detected by windows as a standard controller. The schematic and source code are available on his website. He says it can also be used as a “motion mouse”. You can see a video of that after the break.

When we first saw the video, we thought it might be the same person as the accelerometer controlled maze project, due to the wiimote steering wheel casing.

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Metal Race combines operation and calculator game

metal_race

[Greg] was feeling nostalgic about the game RACE for to TI-83 graphing calculator. In the game, your car is stationary with controls to move the scrolling maze from side to side in order to avoid a crash. He set out to build a physical version of the game with a don’t-touch-the-side concept that reminds us of Operation.

The game board is a wire frame constructed from paperclips then attached to a motorized frame. The vehicle is also metal and is attached to the lens sled from a scrapped CD-ROM drive. The maze scrolls from left to right with up and down vehicle motion controlled by two arcade buttons. An Arduino controls the motors and monitors the button inputs. He has plans to add a buzzer that sounds when the metal car “crashes” in to the wire walls of the maze. We’ve embedded video of the working game after the break. For more build photos take a look at his flickr set. [Read more...]