The compact (0.4″ × 0.5″) D24V5F5 switching step-down (or buck) voltage regulator takes an input voltage between 7V and 36V and efficiently reduces it to 5V while allowing for a maximum output current of 500 mA.
This is a set of wheelchair motors and make great heavy duty robot motors. One left motor and one right motor. They are right angle gear drives with a release and electric brakes. They are 24VDC and the operating speed is 120 RPM.