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Reflectance sensorQTR-L-1A - analog (2 pcs) - Pololu 2454
Module with reflective sensor basing on the transmitting LED and phototransistor operating in the infrared range. The sensor is powered with the 5V voltage. The output is an analog voltage.
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Product description: Reflective sensor QTR-L-1A - analog (2 pcs)
The sensor consists of IR LED and receiver in the form of phototransistor. In addition to these two basic elements, in the circuit are: resistor limiting the transmitting LED's current 220 Ω and the pulling-up resistor, output of the phototransistor collector for supply voltage with the value of 20kΩ. The output is an analog voltage that depends on the color of the surface. The array below presents other examples of values depending on the distance and color of the surface.
| Distance | White surface | Black insulating tape |
|---|---|---|
| 6 mm | 0.2 V | 3.8 V |
| 25 mm | 2.4 V | 3.5 V |
Method of using
- Connection of the sensor's output to the analog-to-digital transmitter (for example, embedded in the microcontroller).
- Connection usingthe comparatordirectly to the I/O pins.
- Using the built-in, in some microcontrollers, internal comparator.
| Daylight, especially sunlight can affect the operation of the sensor. In the case when the output voltage is too low, you should install a rim that protects the sensor from the exposure to external light. |
Pinout of reflective sensor
The sensor has three simple pins: power supply - VDD (supply voltage), ground - GND and the analog output signal OUT. For proper operation, it is sufficient to connect the power supply.
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Specification of QTR-L-1A reflective sensor
- The supply voltage: 5 V
- The average current consumption: 17 mA
- Recommended measuring range: 3 mm - 6 mm
- Maximum measuring range: 25 mm
- Output: voltage-analog signal (0 V up to the value of the supply voltage)
- Dimensions: 7.6 x 8.9 x 3.1 mm (without connectors)
- Weight: 0.2 g (without connectors)
Useful links
| Name | Value |
|---|---|
| Voltage to | 4.5 V |
| Voltage from | 5.5 V |
| Interface | analog |
| Sensor - distance to | 0.5 cm |
| Sensor - distance from | 0 cm |
| Width | 8.5 cm |
| Height | 0.7 cm |
| Depth | 7.5 cm |
| Weight | 0.002 kg |
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30 days to return, without giving a reason
If the product does not meet your expectations, you have 30 days from receiving the parcel to withdraw from the contract. The product only has to be complete. The right of return belongs to consumers (a purchase unrelated to business activity).
Complaints
If the product turns out to be faulty, you can make a claim under the guarantee or the statutory warranty. We handle claims without delay, at the latest within 14 working days of receiving the report together with the goods.
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Instructions and documents
GPSR data
Product information
This product is a component intended for further assembly or prototyping. It is not a finished product within the meaning of the product safety regulations.
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