I am in the planning stages of building a motorized altazimuth telescope/antenna mount. I will be using two large stepper motors that operate at 1.75 Volts / 12.7 Amps. I would like to make the mount portable by powering it with a 12 Volt car battery.
What would be the most appropriate circuit and component values to power these stepper motors within spec?
Note: I am not needing details on the stepper motor wiring or switching, just a means of dropping the voltage/current to the appropriate amounts.