{"product_id":"pololu-qtr-1a-reflectance-sensor-2pk","title":"Pololu QTR-1A Reflectance Sensor (2pk)","description":"\u003cul\u003e\r\n\u003cli\u003ePack of two Infrared phototransistor based reflectance sensor\u003c\/li\u003e\r\n\u003cli\u003eGreat for edge detection and line following applications\u003c\/li\u003e\r\n\u003cli\u003eMeasures only 0.3\" x 0.5\" x 0.1\" and weighs 0.23 gram\u003c\/li\u003e\r\n\u003cli\u003eHeaders not soldered\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003eThe \u003cstrong\u003ePololu QTR-1A Reflectance Sensor \u003c\/strong\u003ecarries a single infrared LED and phototransistor pair in an inexpensive, tiny 0.5\" x 0.3\" sensor module that can be mounted almost anywhere and is great for edge detection and line following applications. The LED current-limiting resistor is set to deliver approximately 20-25 mA to the LED when VIN is 5V. The current requirement can be met by some microcontroller I\/O lines, allowing the sensor to be powered up and down through an I\/O line to conserve power.\u003c\/p\u003e\r\n\u003cp\u003eBecause of its small size, multiple units can easily be arranged to fit various applications such as line sensing and proximity\/edge detection. The reflectance sensor ships with a 3-pin 0.1\" header strip, which can be soldered in the conventional perpendicular orientation or parallel to the PCB. You can also solder wires, such as ribbon cable, directly to the pads for the smallest installation.\u003c\/p\u003e","brand":"Pololu","offers":[{"title":"Default Title","offer_id":41724782543000,"sku":"RB-Pol-49","price":6.35,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0487\/4158\/0952\/products\/pololu-qtr-1a-reflectance-sensor-2pk.jpg?v=1652722222","url":"https:\/\/robotshopshop-dev.myshopify.com\/products\/pololu-qtr-1a-reflectance-sensor-2pk","provider":"RobotShop Dev","version":"1.0","type":"link"}