Arduino Line Follower IR Array Sensor Testing Analog and Digital
For More Information and to build a complete line follower,
Visit - http://rootsaid.com/line-follower-rob...
Let us start the building of our line following robot by testing out the IR Sensors and getting the readings out of them. You can either use individual sensors or the array sensor for our Line Following Robot (I recommend IR sensor array).
Single IR Sensor - https://amzn.to/2LI7DI6
Line Array IR Sensor - https://amzn.to/2uGZ3me
For an ordinary Line follower robot, two IR sensors are enough. But if you are planning to take that to the next level with some advanced movements or PID Algorithm integration (which I will be covering in the next chapter), it would be better if your line follower gets some extra eyes. You could either add the number of individual IR Sensors, which is quite messy and power consuming, or you could buy or build an array of sensors in a single board. This can be called as an IR Sensor Array.
An IR Array board consist of 4-9 pairs of IR Transmitters and Receivers arranged in a line. Most of the array boards will be having a potentiometer for each sensors to control the sensitivity of the sensor. Also in most cases, you will be having provision to extract digital value as well as analog values from the sensors. These analog values can be used to calculate error levels while using PID Algorithm.
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