Carrera Go Mariokart mod

My wife gave me a Mario Kart Carrera Go racetrack for Christmas because we both love to destroy each other in Mario Kart.

The racetrack is pretty nice, but it lacked the Mario Kart lap/time measurement to provide the real experience.

So I built one myself.

To detect the race cars, I attached Hall sensors and magnets under the cars. I glued the sensors to the underside of the racetrack. To make the whole thing work without a permanent cable connection, I installed a battery that I found in an old Elfbar on the street.

For the Hall sensors, I used two Hall sensor breakouts that I had left over from a cheap Arduino sensor kit.

Any Hall sensor with a digital output will work, or simply a reed switch with pull-up.

The Display is mounted with two M3x5 mm screws.

I used a TP4056 Type-C charge controller for the Elfbar battery and a generic slide on/off switch.

Images, code, CAD data, and a simple wiring diagram are included in the zip file.

Feel free to modify Hardware and/or code :)