QTR-HD-04A Reflectance Sensor Array: 4-Channel, 4mm Pitch, Analog Output

Pololu item #: 4204
Brand: Pololu supply outlook
Status: Active and Preferred 
RoHS 3 compliant

Price break Unit price (US$)
1 4.04
5 3.72
25 3.42


backorders allowed

pitch × sensors size
(mm)
output max current optimal
range
LED board
4 mm × 4 17.0 × 20.0 analog 30 mA 62 mA 5 mm

This array of IR LED/phototransistor pairs is great for precisely identifying changes in reflectance (like line detection). It operates from 2.9 V to 5.5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high-reflectance objects are generally detectable out to around 40 mm. This version features the traditional-style QTR sensors without lenses.

Alternatives available with variations in these parameter(s): sensor type sensor count sensor pitch output type Select variant…

 Description Specs (15) Pictures (7) Resources (6) FAQs (0) On the blog (1) 

QTR-HD-04A Reflectance Sensor Array.

QTR-HD-04A Reflectance Sensor Array, front and back views.

QTR-HD-04A Reflectance Sensor Array dimensions.

Pinout diagram of the QTR-HD-04A Reflectance Sensor Array.

Demo of IR LED dimming and independent even/odd control on the QTR-HD-07x (as seen through an old digital camera that can see IR).

Schematic diagrams of individual QTR sensor channels for A version (left) and RC version (right). This applies only to the newer QTRs with dimmable emitters.

The QTR Reflectance Sensor Arrays are available in many different sizes.


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