Sensor

The sensor is the eye of your line follower. It should fast refresh rate. To detect line strip you can use

1. IR Sensor - Black and white
2. LDR - Black and white track
3. LDR with RGB LED - color track

For our project, I am always using IR sensor. It will be either 5 sensor array with an obstacle sensor or 8 sensor array.

SL	Sensor	Image	Comment
1	Single IR Sensor		Simple and easy to use for beginner
2	8 Sensor Array		Analog as-well-as digital output
2	5 Sensor Array		With obstacle (IR/machanical) sensor
2	Pololu		Auto calibration and fast refresh