[WIP] NXT RC Kart

[m2fel]

Hello everyone,

I would like to present my project: Lego NXT RC Karts. The idea was to build Lego RC Karts with a remote control that recognize the race track and respond to various inputs :)

Originally, communication between the karts was also supposed to be possible. Unfortunately, the NXT master-slave-slave-slave combination was too slow for data exchange and therefore not feasible (the complete code was ready, but the response to inputs was much too slow). Then I switched to the remote control (master NXT), vehicle (slave NXT) option.
I used the NXT Shooter as a basis and built two vehicles from it for testing. The vehicles each have two motors for propulsion, one motor for the shooter (useless but fun gimmick) and a color sensor to recognize the track. In one vehicle, the tracks are controlled individually and the other has separate steering and acceleration. The remote controls have two motors for steering and buttons for shooting and stopping the drive motors :)

The color sensor detects the track beneath the vehicle. It distinguishes between the road surface (white, 80% power), red (braking strips, 60% power), green (boost, 100% power), and beside the track (neither white, red, nor green, 40% power).
The track will consist of a paper roll (white) with obstacles (red areas) and boosts (green areas).
It all works  (hurray, took quite some time) Next, I'm going to build some fancier vehicles. I'm thinking of a tracked vehicle (similar to 42095) and a go-kart :)

Programming was painfull and I had to start from very little knowledge. Many thanks to @Philo as I learned a lot from his spy bot and the related NXT programs.

If there are requests for videos I might try my luck and learn where to upload and how to share those :P

More Pictures of the vehicles, remotes and code can be found on Bricksafe. Names are Remote (Master: M1 or M2) vehicles (Slave: SM1 and SM2)