I was thinking about adding LED lights to the cars using the provided USB port.
To check if there is power at all I measured the pins on the port, but I only get 2.5V . From the USB specifications this should be 5V. I am not sure if I do somthing wrong or if this is somthing special with the cars.
The resulting problem is that all White LEDs I found require more than 2.5V which would make this much more complex (step up converter...) than I had planned for (just some LEDs + resistors).