Line Tracing Black / White Line Hunting Sensor Module 

Features:

Photosensitive diode 
Working power: + 5V 
Working current: < 10mA 
Working temperature range: 0'C 50'C 
Output electrical level signal: TTL 
Output interface: 3 wire 
Easy to install
pin
1. gnd
2. out
3. 5vcc