I decided to throw this together simply because I wanted something faster than the tamiya treaded chassis I had previously finished. See that link for schematic and code as this project is very similar. Main difference is this used a different H-bridge.
As I understand this auto uses DC motor for steering. Do you apply contant current when steering? Whne I do on my car, the motor makes funny noises because the motor cant turn any more. Is it ok or how do you steer ?
This thing does use DC motors, a larger one in the rear for locomotion and a smaller one in the front for steering. The steering mechanism on this has a clutch, so the motor keeps spinning when the steering column reaches either side. If the motor were to stop that would mean it is stalled. If stalled for a significant amount of time the motor might get hot and burn out. For the steering on this car I supplied ample current using PWM (duty cycle of 72%) to turn the motors to each side fully.
Where did you get the car?