Sensors » Pololu QTR Reflectance Sensors » Medium-Density (MD) QTR Arrays »
QTRX-MD-04A Reflectance Sensor Array: 4-Channel, 8mm Pitch, Analog Output, Low Current
|pitch × sensors||size
|8 mm × 4||29.0 × 20.0||analog||3.5 mA||9 mA||10 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 high-performance, low-current QTRX sensors with 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)|
QTRX-MD-04A Reflectance Sensor Array.
QTRX-MD-04A Reflectance Sensor Array, front and back views.
QTRX-MD-04A Reflectance Sensor Array dimensions.
Pinout diagram of a QTRX-MD-xA Reflectance Sensor Array.
Demo of IR LED dimming and independent even/odd control on the QTRX-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.