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QTR-8A Reflectance Sensor Array

Model : ROB-00095

Brand : Pololu,USA

Supplier : Pololu, USA

TechshopBD, Bangladesh

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BDT795.79

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BDT782.34Save BDT 13.45

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BDT777.01Save BDT 18.78

Green 48 Available

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Summary:
LIne following sensor consisting of 8 IR LED/phototransistor pairs with analog output.

The QTR-8A 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 eight IR emitter and receiver (phototransistor) pairs evenly spaced at intervals of 0.375" (9.525 mm). Each 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 outputs are all independent, but the LEDs are arranged in pairs to halve current consumption. The LEDs are controlled by a MOSFET with a gate normally pulled high, allowing the LEDs to be turned off by setting the MOSFET gate to a low voltage. Turning the LEDs off might be advantageous for limiting power consumption when the sensors are not in use or for varying the effective brightness of the LEDs through PWM control.

Click here to know more about this product.

  • Dimensions: 2.95" x 0.5" x 0.125" (without header pins installed)
  • Operating voltage: 3.3-5.0 V
  • Supply current: 100 mA
  • Output format: 8 analog voltages
  • Output voltage range: 0 V to supplied voltage
  • Optimal sensing distance: 0.125" (3 mm)
  • Maximum recommended sensing distance: 0.25" (6 mm)
  • Weight without header pins: 0.11 oz (3.09 g)
Login to post comments.
anon
Taufiiqq | Sep 21,2014 at 12:48 AM
any update of the availability? waiting for it for quite a long time now...
anon
A.R | Sep 24,2014 at 05:52 PM
we have placed our order. It is supposed to come after Eid-ul-adha.
anon
Pritom256 | Jan 11,2015 at 03:38 PM
Will it be available before February?
anon
A.R | Jan 11,2015 at 03:48 PM
No chance.
anon
Ferdib | Nov 25,2015 at 10:05 PM
It contains 8 sensors. Is it available in 6 sensors version?
anon
A.R | Nov 26,2015 at 09:26 AM
No.
anon
Navidahmed | Nov 6,2016 at 12:46 PM
which one is comparatively good?
QTR-8RC Reflectance Sensor Array or QTR-8A ??
anon
Navidahmed | Nov 6,2016 at 12:46 PM
which one is comparatively good? QTR-8RC Reflectance Sensor Array
anon
Navidahmed | Nov 6,2016 at 12:47 PM
which one is comparatively good? QTR-8RC Reflectance Sensor Array or QTR-8A ??
anon
A.R | Nov 6,2016 at 03:14 PM
It's not a matter of good or bad. One has digital output, another has analog. choice depends on your application.


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