Description
Grove - Infrared Reflective Sensor is used to detect the presence of an object within a specific range. This product uses the RPR-220 to detect. The sensor consists of an IR LED and a photosensor (phototransistor) pair. The light emitted by the IR LED gets reflected by any object placed in front of the sensor and this reflection is detected by the photosensor (phototransistor). Any white (or lighter) colored surface reflects more than black (or darker) colored surface.
When the reflected light is detected, it produces Digital LOW (or Binary 0) output on the SIG pin. The on-board LED indicator will also glow. If no reflection is detected or if the object is too far from the sensor, the output on the SIG pin stays at Digital High (Binary 1). The on-board LED indicator will be off as well. The detectable range of this sensor is 416 mm. The module incorporates a Rail-to-Rail Operational Amplifier to amplify the output of phototransistor. There is a potentiometer which can be used to adjust the gain of the amplifier, that is, sensitivity of detection.
Application
Compact disc players
Copiers
Game machines
Office automation equipment
Line following robots
Optical encoders
Object counting
Specifications
Dimensions
89mm x140mm x 10.5 mm
Weight
G. W 4g
Battery
Exclude
Operating voltage (V)
3.35V
Operating current (mA)
14.6915. 35 mA
Effective detectable distance
415 mm
Response time
10 s
Phototransistor: Peak sensitivity wavelength
800 nm
IR LED: Peak light emitting wavelength
940 nm
Hardware Overview
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.
Part List
Grove - Infrared Reflective Sensor*!
Grove Cable*1