Kevin Teresa based in Switzerland has created a new open source stepper motor driver board with 6A / phase and 48V capabilities enabling it to drive a wide variety of stepper motors from NEMA 17 ...

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Packaged in a single multi-chip module, the integrated driver/amplifier achieves the lowest power dissipation currently available for a 4A stepper motor driver. With an Rds (on) of 65mΩ, the TMC2660 ...