Modifications

The modules are available in two different output formats: the QTR-xA outputs an analog voltage between 0 and Vcc that can be measured by an analog-to-digital converter (ADC), and the QTR-xRC outputs require a digital I/O line capable of driving the output line high and then measuring the time for the output voltage to decay (which provides an analog measurement of reflectance).

The modules are available in two different output formats: the QTR-xA outputs an analog voltage between 0 and Vcc that can be measured by an analog-to-digital converter (ADC), and the QTR-xRC outputs require a digital I/O line capable of driving the output line high and then measuring the time for the output voltage to decay (which provides an analog measurement of reflectance).

{{POLImage|Pololu-Senseur-QTR-02.png|360px|Les différentes modèles de senseur QTR.}}

{{POLImage|Pololu-Senseur-QTR-02.png|493px|Les différentes modèles de senseur QTR.}}

Please see the product pages for more information on how these sensors work.

Please see the product pages for more information on how these sensors work.