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QTR-HD-04A Reflectance Sensor Array: 4-Channel, 4mm Pitch, Analog Output
| pitch × sensors | size (mm) |
output | max current | optimal range |
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|---|---|---|---|---|---|
| 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) |
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QTR-HD-04A Reflectance Sensor Array. |
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QTR-HD-04A Reflectance Sensor Array, front and back views. |
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QTR-HD-04A Reflectance Sensor Array dimensions. |
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Pinout diagram of the QTR-HD-04A Reflectance Sensor Array. |
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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). |
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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. |
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The QTR Reflectance Sensor Arrays are available in many different sizes. |
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