1.5m Usb Extension Cable Type a Male To Type a Female

QTR 8RC Line Following IR Description:

QTR-8RC is a reflectance sensor array but intended as a line sensor
. It can be used as a general-purpose proximity IR or reflectance sensor. The device has 8 pai of IR LED and Phototransistor mounted on a 9.525 mm pitch.

No analog to digital conveion requires
Improved sensitivity over voltage-divider analog output
Parallel reading of multiple senso is possible
Operating voltage : 3.3 to 5V
Sensing distance : 3mm