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QTR-3A Reflectance Sensor Array
This compact module packs three IR LED/phototransistor pairs onto a 1.25″ × 0.3″ board. The sensors are mounted on a 0.375″ pitch, making this array a great minimal sensing solution for a line-following robot. Each sensor provides a separate analog voltage output.
| Description | Specs (5) | Pictures (7) | Resources (11) | FAQs (0) | On the blog (2) |
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QTR-3A reflectance sensor array. |
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QTR-3A or QTR-3RC reflectance sensor array, bottom view with dimensions. |
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QTR-3A or QTR-3RC reflectance sensor array on a 3/4" line with a quarter for size reference. |
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QTR-3A or QTR-3RC reflectance sensor array with included header pins. |
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QTR-3A and QTR-3RC reflectance sensor arrays soldered in different orientations. |
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QTR sensor size comparison. Top row: QTRX-HD-07, QTR-HD-07; middle row: QTR-3, QTR-1, QTR-L-1; bottom row: QTR-8. |
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Schematic diagram for the QTR-3A reflectance sensor array. |
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