Pololu 5V Step-Up/Step-Down Voltage Regulator S9V11F5 Abverkaufen higher frequencies might work but

higher frequencies might work but were not tested

Peak current can reach 40 mA

Maximum range of 765 cm (300 in)

HRLV-MaxSonar-EZ0

6 A stall torque at 12 V CB (carbon brush)

Pololu 5V Step-Up/Step-Down Voltage Regulator S9V11F5 Abverkaufen higher frequencies might work butThe Pololu step up step down voltage regulator S9V11F5 is a switching regulator (also called a switched mode power supply (SMPS) or DC to DC converter) that uses a buck boost topology. It takes an input voltage from 2 V to 16 V and increases or decreases the voltage to a fixed 5 V output with a typical efficiency of over 90%. Note that this regulator requires an input voltage of at least 3 V to start, but it can operate down to 2 V after startup.