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QTR-HD-31A Reflectance Sensor Array: 31-Channel, 4mm Pitch, Analog Output
| pitch × sensors | size (mm) |
output | max current | optimal range |
|
|---|---|---|---|---|---|
| LED | board | ||||
| 4 mm × 31 | 125.0 × 16.5 | analog | 30 mA | 495 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 and separate controls for the odd and even emitters. 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 50 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) |
|---|
Dimensions
| Size: | 125.0 × 16.5 × 2.5 mm |
|---|---|
| Weight: | 8.5 g |
General specifications
| Maximum range: | 50 mm |
|---|---|
| Optimal range: | 5 mm |
| Minimum operating voltage: | 2.9 V |
| Maximum operating voltage: | 5.5 V |
| LED current: | 30 mA1 |
| Peak wavelength: | 940 nm |
| Maximum current draw: | 495 mA2 |
| Sensor type: | QTR |
| Sensor pitch: | 4.0 mm |
| Sensor count: | 31 |
| Output type: | A (analog voltages) |
Identifying markings
| PCB dev codes: | irs51a3 |
|---|---|
| Other PCB markings: | 0J113763 |
Notes:
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