I'm working on a project to automate a child's Power Wheels (ride on car) toy, and I need to find a good power steering solution. I'm using an Uno to drive an HS-805BB servo, being fed 6V from an LM2596 based buck converter from eBay, coming from a big 12V battery. I believe the servo is getting enough power, but it's not working under the weight of the car, let alone any riders in it.
Is there anything I would be missing in this setup to get more torque? I'm using the Servo library in Arduino and it works great without a load. Should I get a bigger servo (or linear actuator)?
Thanks a lot