9V, 5A Step-Down Voltage Regulator D36V50F9 hub-labor which lets you use voltages

which lets you use voltages above your stepper motor's rated voltage to achieve higher step rates

An external potentiometer can also be added to change the set voltage

Connect 5 V to this pin to power the current sensor

you could build a

U3V50AHV (9-30 V) efficiencies for various combinations of VIN and VOUT:

9V, 5A Step-Down Voltage Regulator D36V50F9 hub-labor which lets you use voltagesThis powerful synchronous switching step down (or buck) regulator takes an input voltage of up to 50 V and efficiently reduces it to 9 V. The board measures only 1? 1? yet delivers typical maximum continuous output currents between 2. 7 A and 7 A, depending on the input voltage, which makes it well suited for powering moderate to large loads. An optional enable input with a precise cutoff threshold can be used to put the regulator in a low power state