{"product_id":"reflective-ir-sensor-with-470-and-10k-resistors","title":"Reflective IR Sensor with 470 and 10K Resistors","description":"\u003cp\u003eA breadboard friendly reflective IR sensor\u003c\/p\u003e\n\u003cp\u003eThis \u003cstrong\u003eReflective IR Sensor\u003c\/strong\u003e 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 \u0026amp; light colored stuff will bounce the light, so  you can detect it. Black \u0026amp; 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. \u003c\/p\u003e\n\u003cp\u003eThese 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.\u003c\/p\u003e\n\u003cp\u003eComes 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.\u003c\/p\u003e\n\u003cp\u003eThis 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.\u003c\/p\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":1086328273,"sku":"ADA2349","price":2.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/2349-00_f0bf4790-8de2-4a1a-a092-92b086774e0d.jpg?v=1646664059","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/reflective-ir-sensor-with-470-and-10k-resistors","provider":"Pimoroni Ltd","version":"1.0","type":"link"}