Grove - Infrared Reflective Sensor v1.2 can be used for detection of proximity and color of objects. Light-colored objects directly in front of the sensor will reflect more infrared light as well as generate more current in the phototransistor than an object with dark-colored surfaces, this can be tell from a built-in indicator LED which will turn red with sufficient flow of current.

This sensor is a widely used in applications such as line-following robots, rotary speed detection, auto-data logging on utility meters or other situations where color or distance contrast is sharp. 

Highlighted Features

• The reflective photosensor -RPR-220 used in this module consists of an infrared light emitting diode and a high –sensitivity phototransistor
• You can adjust the potential-meter on the back of the board if you want to detect a specific object (eg. Black line) at a certain distance
• The intensity of the reflective light increases as the object getting closer
• Panel-mounting Grove interface
• Measure distance through reflected light waves
• Triangulation: Angle of a reflected IR beam is measured
• Invisible to the naked eye
• Suitable to be used to measure complex objects

Applications

• Compact disc players
• Copiers
• Game machines
• Office automation equipment
• Line following robots
• Optical encoders
• Object counting

Specifications

• Digital output: 0 or VCC
• Threshold adjustable via potentiometer
• Power supply: 3.5 – 5.5V DC
• Effective working distance: 4-15mm
• Minimum detectable width for monochrome lines: 10mm
• Connector: 4 pin Buckled Grove interface
• Dimension: 89mm x140mm x10.5mm
• RPR220 Reflective photosensor - Highly sensitive reflective photosensor
• LMV358 - rail-to-rail operational amplifier
• LED Indicator - The LED will switch on when the received infrared light intensity exceeds a preset level
• Light sensitivity adjustment potentiometer - adjust the sensitivity of photosensor to light

Hardware Overview

Data Sheet 1

Data Sheet 2