2,95 EUR
incl. 19 % USt zzgl. Versandkosten
Gewicht: 0.0100 kg
Hersteller: Pololu
Lagerbestand: 20

Lagernd, versandfertig in 24 Stunden.
Art.Nr.: 958The Pololu QTR-1A reflectance sensor carries a single infrared LED and phototransistor pair. The phototransistor is connected to a pull-up resistor to form a voltage divider that produces an analog voltage output between 0 V and VIN (which is typically 5 V) as a function of the reflected IR. Lower output voltage is an indication of greater reflection.
The LED current-limiting resistor is set to deliver approximately 20-25 mA to the LED when VIN is 5 V. 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.
Because of its small size, multiple units can easily be arranged to fit various applications such as line sensing and proximity/edge detection.
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