I am currently in the design phase of a project that is using 3 arduino nanos controlling 2 small stepper motors (28BYJ-48) each. There is a lot of moving parts where some movements are continuous and each arduino is separated from each other by at least one of these continuous parts. This makes it quite difficult since I want to connect the arduinos to each other.
The options I am seeing are:
Connecting them via a powered rail and hoping that the contact surface is good enough. There is a risk that my tolerances are too high and I'll lose connection to an arduino. There is also a problem that I need at a minimum of 3 rails(power, ground and data?)
Using induction to send power to the arduino. With this method I could probably send data through an RF module.
I think that using induction should be the best solution, but I am not sure as this isn't really my field. So the question is, is it feasible to create a small coil and power the arduinos this way? I am not sure if they would disturb the stepper motors either.
To clarify I have a couple of discs with a diameter of around 20cm, that are pretty much touching eachother so the coils can be quite close and 20cm diameter. The coil thickness can be 5mm without interfering with other components.
The discs are oriented the same way and rotating independently in the z-axis.