Grove - Infrared Reflective Sensor v1.2 can be used for detection of proximity and color of objects. The reflective photosensor - RPR-220 used in this module consists of an infrared light emitting diode and a high –sensitivity phototransistor. 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. Also, the intensity of the reflective light increases as the object getting closer. 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.
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.
Features
Easy to use
Panel-mounting Grove interface
Digital output: 0 or VCC
Built-in indicator LED
Threshold adjustable via potentiometer
Power supply: 3.5 – 5.5V DC
Reflective Photosensor: RPR-220
Effective working distance: 4-15mm
Minimum detectable width for monochrome lines: 10mm
Connector: 4 pin Buckled Grove interface
Dimension: 20mm*20mm
Documents
Please visit our wiki page for more info about this product. It will be appreciated if you can help us improve the documents, provide more demo code or tutorials. For technical support, please post your questions to our forum.
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