Features: 

Package Includes:

1 x Tracker Sensor
1 x XH2.54 7PIN wire

The SparkFun RedBot Sensor – Line Follower is an add-on for the RedBot that gives any robot the ability to detect lines or nearby objects. The sensor works by detecting reflected light coming from its own infrared LED. By measuring the amount of reflected infrared light, it can detect transitions from light to dark (lines) or even objects directly in front of it. The sensor has a 3-pin header that connects directly to the RedBot Mainboard via female-to-female jumper wires. Use the included RedBot library to detect lines or objects.

Features:

1. Fast response time
2. High sensitivity
3. Phototransistor output
4. No contact surface sensing

Package Includes:

1 x SparkFun RedBot Sensor – Line Follower

This version of the SparkFun Line Sensor Breakout – QRE1113 (Analog) features an easy-to-use analog output, which will vary depending on the amount of IR light reflected back to the sensor. This tiny board is perfect for line sensing applications and can be used in both 3.3V and 5V systems. The board’s QRE1113 IR reflectance sensor is comprised of two parts – an IR emitting LED and an IR sensitive phototransistor.

When power is applied to the VCC and GND pins the IR LED inside the sensor will illuminate. A 100Ω resistor is on-board and placed in series with the LED to limit current. A 10kΩ resistor pulls the output pin high, but when the light from the LED is reflected back onto the phototransistor the output will begin to go lower. The more IR light sensed by the phototransistor, the lower the output voltage of the breakout board.

Data Download Link:

https://github.com/sparkfun/QRE1113_Line_Sensor-Analog

Features:

1.  It has a Phototransistor output
2. No contact surface sensing
3. It comes with a Miniature package

Package Includes:

1 x SparkFun Line Sensor Breakout – QRE1113 (Analog)