Line Folower Robot

Materials

• Standard 4WD Chasis
• Microcontroller that supports Arduino Code
• L298N Motor Driver
• IR Sensor Array (5 Sensors)
• Portable Power Source

Step 1: Assemble the Chasis and fix the Sensor to the bottom of the Car's front
Attach L298N Motor Driver Module and Arduino on the top of the car.

Wiring circuits

From	Pin	<== Pin Name	To	Pin
L298N	IN1	Left Forward	Arduino	2
L298N	ENA	Left Speed	Arduino	3
L298N	IN2	Left Backward	Arduino	4
L298N	IN3	Right Forward	Arduino	5
L298N	ENB	Right Speed	Arduino	6
L298N	IN4	Right Backward	Arduino	7
IR Array	OUT1	Very Left	Arduino	8
IR Array	OUT2	Slight Left	Arduino	9
IR Array	OUT3	Middle	Arduino	10
IR Array	OUT4	Slight Right	Arduino	11
IR Array	OUT5	Very Right	Arduino	12

Note: Wiring depends on your orientation
This is why I have included "Pin Name" to describe which Pin I am actually referring to. You can use your own pinouts too.

Wiring motors

From	Pin	To	Pin
Left Motors	Vcc	L298N	OUT1
Left Motors	GND	L298N	OUT2
Right Motors	Vcc	L298N	OUT3
Right Motors	GND	L298N	OUT4

Step 2: Power

• Power is upto you, you can use any thing that has between 7 - 12 Volts

• You simply need to connect it in the following way

  From	Pin	To	Pin
  Supply	Vcc	L298N	12V
  Supply	GND	L298N	GND
  L298N	5V	Arduino	Vin
  L298N	GND	Arduino	GND
  Arduino	5V	IR Array	5V
  Arduino	GND	IR Array	GND

Step 3: Upload the code

Step 4: Try it on different tracks!

Click here to view Code Theory