Line Follower Robot Using IR Sensor

Curious about robotics? Dive into the exciting world of automation with a line follower robot! Using infrared (IR) sensors, this clever little bot can navigate along a path all on its own. Let’s take a closer look at how it works, its cool features, and where you can use it.

Working of IR Sensors

The IR sensor is like a secret agent with a special mission: to detect the color of the surface it’s on. Here’s how it does its job:

• Sending Signals: The IR sensor sends out invisible rays called infrared (IR) rays all the time, like a flashlight that’s always on.
• Detecting Colors: When the sensor is on a black surface, that surface absorbs the IR rays. But when it’s on a white surface, the rays bounce back.
• Resistance Change: Inside the sensor, there’s a receiver that’s like a detective. When it gets lots of IR rays bouncing back, its resistance decreases.
• Voltage Change: Normally, the receiver has high resistance, so the voltage is around 5 volts at its output pin.
• Grounded Signals: But when the receiver detects more IR rays, its resistance drops and it “talks” to the ground, making the output voltage drop to 0 volts.

So, when the IR sensor sees a black surface, it’s like saying, “Shhh, keep quiet.” But when it sees a white surface, it’s like shouting, “Hey, over here!” That’s how it tells the difference between black and white.

Working of Line Follower Robot

• Case 1 :- In this case, both the sensors don’t detect the line. Both the motors rotate forward. As a result, the car moves forward.
• Case 2 :- In this case, only the left sensor detects the line which means that the car requires to turn in the left direction. The left motor rotates backward and the right motor rotates forward. As a result, the car turns left.
• Case 3 :- In this case, only the right sensor detects the line which means that the car requires to turn in the right direction. The left motor rotates forward and the right motor rotates backward. As a result, the car turns right.
• Case 4 :- In this case, both the sensors detect the line. This means that the end has come. Both the motors stop rotating. As a result, the car stops.

That is the working structure of our robot

Product Video

Features of Line Follower Robot

• IR Sensor Magic: With infrared sensors, the robot can “see” the line even in different lighting conditions.
• Independent Navigation: Once you set it on the line, the robot can follow it all by itself, no remote control needed!
• Learn as You Go: Building and programming a line follower robot is a fantastic way to learn about robotics, sensors, and coding in a hands-on way.
• Versatile Exploration: Whether you’re a student, hobbyist, or educator, a line follower robot offers endless opportunities for creativity and learning.

Applications

• This can be used in driver less car system with some added features like obstacle detection.
• This can also be used in industrial and defense applications.

Limitations of Line Follower Robot

• Line follower robot requires 2-3 inches broad line.
• It may not move properly if the black line drawn is of low intensity.
• The IR sensors may sometimes absorb IR rays from surroundings also. As a result, robots may move in improper way.

Package Includes

• 1 x Line Follower Robot Using IR Sensor