Pololu QTR-HD-25A Reflectance Sensor Array: 25-Channel, 4mm Pitch, Analog Output

The QTR-HD-25A Reflectance Sensor Array is a 25-channel device with a 4mm pitch and an analog output. It measures 101.0mm by 16.5mm in size and operates within a maximum current range of 30mA for the LED and 405mA for the board. The optimal range for this sensor array is 5mm. This sensor array is equipped with an array of IR LED/phototransistor pairs, making it an excellent tool for identifying changes in reflectance, such as line detection. It operates efficiently within a voltage range of 2.9V to 5.5V. A unique feature of this array is its dimmable brightness control, which functions independently of the supply voltage. Additionally, it offers separate controls for the odd and even emitters.One of the key benefits of the QTR-HD-25A Reflectance Sensor Array is its ability to detect high-contrast changes between light and dark readings, which generally increases the closer the object is to the sensor. However, it is also capable of detecting high-reflectance objects at a distance of up to 50mm. This version of the sensor array features traditional-style QTR sensors without lenses, offering a more straightforward and uncomplicated user experience.Whether you're a hobbyist or a professional, the QTR-HD-25A Reflectance Sensor Array is a reliable and versatile tool for any project requiring precise reflectance detection.