Here at Hackaday we’re always exited to see hacks that recycle our favorite childhood consoles into something new and interesting. In that context, it’s not so uncommon to see mods which combine new and unusual control methods with old devices in ways that their manufacturers never intended. What [Mike Choi] has built with the Labo Fit Adventure Kit is the rare hack that combines radically new control schemes with a modern console: without actually modifying any hardware.
In short, the Labo Fit Adventure Kit lets the player play Mario Kart on the Nintendo Switch by riding a stationary exercise bike, steering with a wheel, and squeezing that wheel to use items. The Fit Kit combines the theme of Labo, Nintendo’s excellent cardboard building kit for the Nintendo Switch with the existing Ring-Con accessory for the unrelated Nintendo game Ring Fit Adventure plus a collection of custom hardware to tie it all together. That hardware senses cadence on the stationary bike, watches for the user to squeeze the handheld wheel controller, and translates those inputs to button presses on the controller to play the game.
The most fascinating element of this project is the TAPBO module which adapts the Joy-Con controller to remote input. The module includes electronics, actuators, and a clever mechanical design to allow it to be mounted to the Ring-Con in place of an unmodified Joy-Con. Electrically the components will be familiar to regular Hackaday readers; there is a breakout board for a Teensy which also holds an XBee module to receive inputs remotely and drive a pair of servos. The entire module is described in detail starting at 4:42 in the video.
Mechanically the TAPBO relies on a pair of cam-actuated arms which translate rotational servo motion into linear action to press shoulder or face buttons. The module directly measures flex of the Ring-Con with an added flexible resistor and receives cadence information from another module embedded in the stationary bike via Zigbee. When these inputs exceed set thresholds they drive the servos to press the appropriate controller buttons to accelerate or use an item.
We’ve focused pretty heavily on the technical aspects of this project, but this significantly undersells the level of polish and easy to understand documentation [Mike] has produced. It includes a TAPBO Amiibo in customized packaging, and more. Check out the full video to get the complete scope of this project.
Here’s a slick-looking VGA demo written in assembly by [Yianni Kostaris]; it’s VGA output from an otherwise stock ATmega2560 at 16MHz with no external chips involved. If you’re getting some Super Mario Kart vibes from how it looks, there’s a good reason for that. The demo implements a form of the Super Nintendo’s Mode 7 graphics, which allowed for a background to be efficiently texture-mapped, rotated, and scaled for a 3D effect. It was used in racing games (such as Super Mario Kart) but also in many others. A video of the demo is embedded below.
[Yianni] posted the original demo a year earlier, but just recently added detailed technical information on how it was all accomplished. The AVR outputs VGA signals directly, resulting in 100×120 resolution with 256 colors, zipping along at 60 fps. The AVR itself is not modified or overclocked in any way — it runs at an entirely normal 16MHz and spends 93% of its time handling interrupts. Despite sharing details for how this is done, [Yianni] hasn’t released any code, but told us this demo is an offshoot from another project that is still in progress. It’s worth staying tuned because it’s clear [Yianni] knows his stuff.
If you’ve ever had a casual go-kart experience, you might be able to relate to [HowToLou]. He noticed that whenever he tried to race, the same situation inevitably always happened. One racer would end up in front of the pack, and no one else would be able to pass them. The result was more of a caravan of go-karts than an actual race. That’s when he realized that video games like Mario Kart had already figured out how to fix this problem long ago. [Lou] took ideas from these games and implemented them onto a real life go-kart in order to improve the experience. The result is what he calls a Flash Kart.
The key to improving the experience was to add more features that you don’t normally get in a real word go-karting experience. The Flash Kart uses an electronic drive system that is controlled by computer. This setup allows the computer to limit the speed of the kart so they are all the same. The system includes a Logitech gaming steering wheel with built-in control buttons. There is also a color LCD screen mounted as a heads up display. The screen displays the racer’s speed in miles per hour, as well as multiple MP3 music tracks to choose from. The system provides the user with a limited number of speed boost tokens, listed on the heads up display. The user can also view their current ranking, their location on the track, or even get a view directly behind them.
The back of the kart includes a 23″ LCD screen that shows other players who you are and what team you are on. For added fun, the rider can display taunting messages to other racers using this screen. The front of the kart includes a laser cannon for shooting other karts as well as a “token scoop” sensor. This allows the riders to pick up virtual items such as laser cannon ammo, shields, or extra speed boost tokens.
To pack in all of this added functionality, [Lou] started with a typical go-kart chassis. From there, he built a custom fiber glass shell for the back-end. This houses most of the sensitive electronics. The system is powered by three 12V deep cycle batteries. A 15HP electric motor drives the rear wheels. The throttle is controlled with a gas pedal that simply feeds to a sensor that is hooked up to the control computer. The heart of the system is a computer that runs on a 2.6Ghz small footprint Zotac motherboard with Windows XP. The software is custom written in C#. The computer is plugged into a miniLAB 1008 interface board. This is how it communicates with all of the various sensors. The interface board is also used to control a number of relays which in turn control the speed of the kart.
Unfortunately [Lou] built this kart years ago and doesn’t include many details about what sensors he is using, or how the software works. Still, this was such a cool idea that we had to share it. Be sure to watch [Lou’s] video below to see the kart in action. Continue reading “Making Mario Kart Real”→
[Ken] likes his living room and he is on a continual mission to make it more interesting. Recently, he has made a giant leap forward with a racing game project he calls RomoCart. Think of it as a partially-physical game of Mario Kart. You are able to race others around a track while still having the ability to fire projectiles or drop defensive measures in efforts to win the race!
First, lets talk about the hardware required. The racers are standard Romo educational robots. Wireless game controllers provide the means for the drivers to control the Romos. Hanging from the ceiling is an Xtion motion sensing camera and a video projector, both pointed down at the floor.
To get started, the system scans the floor and determines a race course based on the room layout and any physical objects in the vicinity. A course is then generated to avoid the obstacles and is projected onto the floor. At this point it would still be a pretty neat project but [Ken] went way further. The ceiling-mounted camera tracks the motion of the Romos driving around the track and the video projector displays a smoke trail behind each racer. Randomly displayed on the track are items to help you win the race, including an acceleration item that makes your Romo go twice as fast for a short time.
Have a tailgater? No problem, just pick up some bananas and drop them on the track. If a following competitor drives into one, they spin out. If you want to get super rude, pick up some missiles and fire them at the racers ahead of you. A direct hit will stop them right in their tracks.
The team over at Waterloo Labs reasserts their reputation for creativity with this real life Mario Kart project. One of the team members must work at Austin’s Park because they seem to have had free rein when it comes to modifying the go-karts and filming the delightful video presentation found after the break.
It’s one thing to put on some costumes and head off to the go-kart track. It’s another to modify the vehicles to react to items launched by another rider. You can see the painted PVC launcher hardware to the right of each driver. By stuffing a plush item (banana, star, mushroom, etc.) in the barrel the driver can use compressed air to launch it quite a distance. Inside of each item is an RFID tag. When the RFID reader on a kart detects the tag it can take control of the steering, brake pedal, or speed limiter to inflict the appropriate actions.