Arduino 3.3 V to 5 V to controll Stepper Driver MA860H
You don't need anything as fancy as a voltage translator. Figure 10 of the manual shows a connection using open-collector outputs; all you need to do is replicate that by hand. You can do this with either discrete NPN transistors or a chip such as the ULN2003/2803. You don't even need to connect the COM pin since the driver is not an inductive load.