SG90 RC Nemo Car N9 by FrN

This is a 4WD car platform that allow student to start build/develop for their own AI vehicle on top. it looks like Nemo so i call it N9.

Design Notes:
- Two SG90 servo motors (360 degree) is used to provide the 4 wheel drive motions.
- The servos have sufficient torque to climb on a ramp or carry load if needed.
- A standard mini-IR controller is used to control the basic forward, backward, CW, CCW rotation and LED headlight ON/OFF.
- The keypad layout of the mini-remote may be differe