Pololu

Pololu QTR-3A Reflectance Sensor Array

Name: Pololu QTR-3A Reflectance Sensor Array
Brand: Pololu
SKU: PO2456
Price: 8.25 EUR
Availability: InStock

SKU: PO2456

8,25 €

per pack

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Net: 6,93 €

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Available immediately

Delivery time: ca. 3 weeks (DE - int. shipments may differ)

Product Information

Product safety information

Manufacturer information:

Pololu Corporation
Pilot Rd. 920
Nevada
Las Vegas, Vereinigte Staaten, 89119
[email protected]
https://www.pololu.com/

Responsible person:

Eckstein GmbH
Am Ostbahnhof 3
Niedersachsen
Clausthal-Zellerfeld, Deutschland, 38678
[email protected]
https://eckstein-shop.de

Dimensions and Weight
GTIN:	4060137017728
HAN:	2456
Category:	Distance/ToF Sensor
Storage Tiers:	Maintain
Shipping weight:	0,01 kg
Item weight:	0,01 kg
Dimensions ( Length × Width × Height ):	3,18 × 0,76 × 0,50 cm

Product Description

The QTR-3A reflectance sensor array requires analog inputs to take readings. The similar QTR-3RC reflectance sensor array is available with digital I/O-compatible outputs.

The QTR-3A reflectance sensor array is intended as a line sensor, but it can be used as a general-purpose proximity or reflectance sensor. The module is a convenient carrier for three IR emitter and receiver (phototransistor) pairs. With sensors spaced at intervals of 9.525 mm along of the board’s longer axis, this array works well as a minimal detector for line-following robots, as line-following courses are commonly made using 19 mm black electrical tape. The middle sensor is slightly offset along the short axis of the board.

Each phototransistor is connected to a pull-up resistor to form a voltage divider that produces an analog voltage output between 0 V and VCC (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 resistors are set to deliver approximately 17 mA to the LEDs when VCC is 5 V, making the total board consumption just over 50 mA.

Dimensions: 32 x 8 x 3 mm (without header pins installed)
Operating voltage: 5.0 V
Supply current: 50 mA
Output format: 3 analog voltages
Output voltage range: 0 V to supplied voltage
Optimal sensing distance: 3 mm
Maximum recommended sensing distance: 6 mm
Weight without header pins: 0.02 oz (0.6 g)

Included Components

This module has two mounting holes intended for #2 screws (not included); if the mounting holes are not needed, the ends of the PCB can be ground off to make the unit even smaller (less than 1? wide). The reflectance sensor array ships with a 1x5 straight male header strip and a1x5 right-angle male header strip as shown below. You can also solder wires, such as ribbon cable, directly to the pads for the smallest installation.

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Application Note

Manufacturer according to GPSR
Pololu Corporation, Pilot Rd. 920, 89119 Las Vegas, Nevada, Vereinigte Staaten, [email protected], https://www.pololu.com/
Responsible person according to GPSR
Eckstein GmbH, Am Ostbahnhof 3, 38678 Clausthal-Zellerfeld, Niedersachsen, Deutschland, [email protected], https://eckstein-shop.de

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Pololu QTR-3A Reflectance Sensor Array

Dimensions and Weight

Application Note

Pololu QTR-3A Reflectance Sensor Array

Service package

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