This IR LED/phototransistor pair 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 30 mm. This version features a traditional-style QTR sensor without lenses.
Specifications
Dimensions: 5.0 × 20.0 × 3.9 mm (see thedimension diagram(1MB pdf) for more details)
Operating voltage: 2.9 V to 5.5 V
Sensor type: QTR
Sensor count: 1
Full-brightness LED current: 30 mA (independent of supply voltage)
Max board current: 32 mA
Output format: digital I/O-compatible signal that can be read as a timed high pulse
Optimal sensing distance: 5 mm
Maximum recommended sensing distance: 30 mm
Weight: 0.25 g
Dimensions
Size:5.0 × 20.0 × 3.9 mm
Weight:0.25 g
General specifications
Maximum range:30 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:32 mA2
Sensor type:QTR
Sensor count:1
Output type:RC (measurable by digital I/O)
Identifying markings
PCB dev codes:irs21a3
Other PCB markings:0J113573
Notes:
1.Can be dynamically reduced to any of 32 available dimming levels.
2.With all LEDs on at max brightness setting.
3.Note: this does not differentiate between the A and RC output types.
Manufacturer according to GPSR Pololu Corporation, Pilot Rd. 920, 89119 Las Vegas, Nevada, Vereinigte Staaten, [email protected], https://www.pololu.com/
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