Product Details

• Product: Reflectance sensor array or IR sensor array
• Module: QTR-8RC
• Dimension: 74.93mm x 12.7mm x 3.175mm
• Colour: red
• No of IR pair: 8
• Package contains: 1 x QTR-8RC reflectance sensor array module 

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 pairs of IR LED and phototransistors mounted on a 9.525 mm pitch. 

Each phototransistor in the module is followed by a pull-up resistor that forms a voltage divider and produces an analog voltage output between 0 to 5V as the function of the reflectance sensor. All the outputs are independent but LEDs are paired to halve the current consumption. The LEDs are controlled by MOSFET with a gate normally pulled high that allows LEDs to turn off by setting the MOSFET gate at low voltage. 

Features

No analog to digital conversion requires</li>

Improved sensitivity over voltage-divider analog output

Parallel reading of multiple sensors is possible

Specification

Operating voltage: 3.3 to 5V

Current supply: 100mA

Output voltage range: 0V to supplied voltage

Output format: 8 digital I/O compatible signal

Sensing distance: 3mm

Maximum sensing distance: 9.5mm

Application

Line following robot

DIY electronics and robotics projects