Sign In SHOP BLOG LEARN FORUMS 0 Items VIDEOS SENSORS / LIGHT/COLOR/PHOTO / REFLECTIVE INFRARED IR OPTICAL SENSOR WITH 470 AND 10K RESISTORS Reflective Infrared IR Optical Sensor with 470 and 10K Resistors PRODUCT ID: 2349 IN STOCK ADD TO CART 1 1-9 10-99 100+ ADD TO WISHLIST DESCRIPTION TECHNICAL DETAILS DESCRIPTION This Reflective IR Sensor is a simple plastic casing with two elements - an IR LED and an IR phototransistor. You can control the IR LED and turn it on to bounce IR off objects to determine their reflectivity. White & light colored stuff will bounce the light, so you can detect it. Black & dark colored stuff will absorb the IR light so that it isn't detected. Likewise, if something isn't in the way of the sensor, it won't trigger either. These sensors are handy when you want to detect if something has passed by the sensor, or a very simple hand-detector. Also sometimes these are used as rotary encoder, if the encoder wheel has black and white stripes, the photo sensor is fast enough to tell you the RPM. Comes with a 470 ohm resistor (for biasing the IR LED) and a 10K resistor which you can use as a pull-up resistor for the phototransistor. The sensor is breadboard friendly and easy to solder to. This works best when detecting a light-colored object approximately 5mm away - 2mm to 10mm worked fairly well but your results may vary with the LED brightness, object shininess, etc. New Products 2/11/2015 TECHNICAL DETAILS 15mm x 18mm x 5mm / 0.6" x 0.7" x 0.2" Weight: 1g This optoreflector tutorial might be handy for understanding how these sensors work Wiring diagram for example, pin 13 is the LED control pin, pin 9 is the input from the sensor LEARN Pro Trinket Tachometer Do you know how fast you were going? MAY WE ALSO SUGGEST... Adafruit TSL2561 Digital Luminosity/Lux/Light Sensor SI1145 Digital UV Index / IR / Visible Light Sensor IR (Infrared) Receiver Sensor Adafruit TSL2591 High Dynamic Range Digital Light VCNL4010 Proximity/Light sensor Photo cell (CdS photoresistor) Analog UV Light Sensor Breakout - GUVA-S12SD RGB Color Sensor with IR filter and White LED - GA1A12S202 Log-scale Analog Light Sensor Adafruit ALS-PT19 Analog Light Sensor Breakout Miniature Reflective Infrared Optical Sensors - 5 Pack Photo Transistor Light Sensor DISTRIBUTORS CONTACT SUPPORT DISTRIBUTORS EDUCATORS JOBS FAQ SHIPPING & RETURNS TERMS OF SERVICE PRIVACY & LEGAL EXPAND TO SEE DISTRIBUTORS "Failure is only the opportunity to begin again more intelligently" Henry Ford ABOUT US ENGINEERED IN NYC Adafruit (R) 4.9