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Infrared Charge Transfer (QTI) Sensor Board, QRD1114, 5V US$9.99

555-27401
Infrared Charge Transfer (QTI) Sensor Board, QRD1114, 5V


The QTI Sensor is an infrared emitter/receiver that is able to differentiate between a dark surface (with low IR reflectivity) and a light surface (with high IR reflectivity). These little sensors can be very handy for line following, maze navigation, or sensing the outer rim of a SumoBot ring. Wiring options allow it to be used digitally for fast black/white line following, or as an analog sensor to detect different shades of gray. A daylight filter is built into the sensor.

When your microcontroller measures the time it takes for the QTI's capacitor to decay, it's measuring a rate of charge transfer (QT) through an infrared (I) phototransistor. This rate indicates how much infrared is reflecting off a nearby surface.

QTI Sensor Features

  • Capable of analog or digital output
  • No-contact surface sensing
  • Unfocused for sensing diffused surfaces
  • Daylight filter on sensor
  • Easy to interface with any Parallax microcontroller
  • Power Requirement: 5V DC
  • Communication: Analog output of capacitor decay time depending on level of infrared reflectivity
  • Dimensions: 1.25 0.37 inches (31.7 9.4 mm)
  • Operating Temperature: -40 to +185 F (-40 to +85 C)

QTI Sensor Resources


This product was added to our catalog on Tuesday 05 June, 2012.

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