The code includes two Arduino libraries: one for the servo and another for the ultrasonic sensors ... four gear motors with wheels for moving the car, four LEDs for signaling the active status ...

Outputs, on the other hand, are components that receive data from the Arduino. This includes LEDs, LCD modules, servo motors, and buzzers. When building Arduino projects for beginners ...

We don’t know about you, but for some of us, we were satisfied with blinking two LEDs instead ... actuated by tiny servo motors inside the body. [Greg06] even included an ultrasonic distance ...