So much testing and tuning for these dumb little cars. I need them to go fast enough to start moving, but slow enough to not fly off the track. One car is faster than the other, and with the different radius curves... it’s taken some work. But I can control the speed of each lane independently with the arduino. I had a few components fail (reed swithches) and some electronics fry (power supplies) and a freak shorted out SD card. I didn’t even know that was possible but it took out my sound card.
I have some more bells and whistles to add but the hard part, I THINK, is over.