I was looking at the AR4 robot and was curious how the Teensy was able to control the stepper motor drivers while only outputting 3.3v on its GPIO pins. From my knowledge the drivers are best driven on 5v so how can the Teensy control the stepper motors while only outputting 3.3v?
The drivers are capable of 3.3v input. Stepperonline was supposed to update the specs but that hasn't been done yet.
