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$160.00 MXN (IVA Incluido)
5 disponibles
El sensor de QTR-1A reflectancia lleva un solo par LED y el fototransistor infrarrojo en un pequeño módulo 0,5 “x 0,3” de bajo costo, que se puede montar en casi cualquier lugar y es ideal para la detección de bordes y la línea siguiente. La medición de reflectancia se emite como una tensión analógica. Este sensor se vende en paquetes de dos unidades.
Localización: C3
Peso | 0.02 kg |
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Fabricante | Pololu |
Descuento | 5 o más $152.00 |
5 disponibles
The 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 17 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.
This sensor was designed to be used with the board parallel to the surface being sensed. Because of its small size, multiple units can easily be arranged to fit various applications such as line sensing and proximity/edge detection.
For a line sensor with eight of these units arranged in a row, please see the QTR-8A reflectance sensor array; for a similar array of three slightly different sensor components, see the QTR-3A. For a smaller sensor with longer range, and intended for use with the board perpendicular to the surface, please see the QTR-L-1A reflectance sensor.
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QTR sensor size comparison. Clockwise from top left: QTR-3RC, QTR-1RC, QTR-L-1RC, QTR-8RC. |
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There are several ways you can interface with the QTR-1A output:
This last method will work if you are able to get high reflectance from your white surface as depicted in the left image, but will probably fail if you have a lower-reflectance signal profile like the one on the right.
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Our Pololu AVR library provides functions that make it easy to use these sensors with our Orangutan robot controllers; please see the QTR Reflectance Sensors section of our library command reference for more information. We also have aArduino library for these sensors.
This module has a single mounting hole intended for a #2 screw (not included); if this mounting hole is not needed, this portion of the PCB can be ground off to make the unit even smaller. Each pack of two reflectance sensors includes sets of straight male header strips and right-angle male header strips, which allow you to mount them in the orientation of your choice (note: the header pins might ship as 1×6 strips that you can break into two 1×3 pieces). You can also solder wires, such as ribbon cable, directly to the pads for the most compact installation.
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$65.00 MXN (IVA Incluido)
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ATENCIÓN: Debido a la migración al nuevo sitio web podemos tener discrepancias en cuanto al stock de nuestro catálogo. Una disculpa por los inconvenientes ocasionados. Descartar