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Case 05: A Line-follwing Car

Purpose​

Make a line-following car with NezhaA Inventor's Kit.

Purchse​

NezhaA Inventor's Kit

Materials Required​

Assembly Steps​

Hardware Connections​

Connect two motors to M1 and M2 port and the line-tracking sensor on Nezha-A master box.

Programming​

Prepare the programming​

Steps for preparation please refer to: Arduino 3 in 1 Breakout Board

Import the libraries and the subsidiary libraries of Nezha-A master box and then import the libraries of the line-tracking sensor: PlanetXTracking-main.zip Download and import the self-defined library connections for Nezha-A master box: RJPins-main.zip

Sample Projects:​

// Language ArduinoC
#include <NezhaA.h>
#include <RJPins.h>
#include <PlanetXTracking.h>

PlanetXTracking trackingJ1(J1);    //Create an instance of PlanetXTracking category
NezhaA nezha;    /Create an instance of NezhaA category

void setup() {
  nezha.begin();    //Initiliaze the buzzer, motor, servo and light
}

void loop() {
  if (trackingJ1.isTracked(Right)) {
    nezha.setMotorSpeed(M1, 0);    //Set the speed of the motor connecting to M1 at 0%
    nezha.setMotorSpeed(M2, 15);    //Set the speed of the motor connecting to M2 at 15%
  }
  if (trackingJ1.isTracked(Left)) {
    nezha.setMotorSpeed(M1, 15);    //Set the speed of the motor connecting to M1 at 15%
    nezha.setMotorSpeed(M2, 0);    //Set the speed of the motor connecting to M2 at 0%
  }  
}

Result​

After powering on, the car drives along with the map.