Reliable Line and Reflectance Sensing with QTR-3RC Reflectance Sensor Array
The QTR-3RC Reflectance Sensor Array is built for line sensing and surface detection in small robots and automation projects.
It also works well for edge detection, simple proximity tasks, and reflectance-based triggers.
Important: Reflectance readings vary with surface color, distance, and ambient light. Best results come from calibrating the sensor over the exact surface and standoff you plan to use.
Why you'll love it
- No analog-to-digital converter (ADC) is required
- Improved sensitivity over voltage-divider analog output
- Parallel reading of multiple sensors is possible with most microcontrollers
- To use a sensor, you must first charge the output node by applying a voltage to its OUT pin
- The LED current-limiting resistors are set to deliver approximately 17 mA to the LEDs when VCC is 5 V, making the total board…
- Built for line sensing and reflectance detection
What you can build
A strong fit for line followers, edge detectors, tape tracking, surface sensing, and small robots that need fast reflectance feedback.
Technical specifications
| Product | QTR-3RC Reflectance Sensor Array |
|---|---|
| Brand | Pololu |
| Category | Reflectance Sensor Array |
| Board Size | 1.25″ × 0.3″ |
| Sensor Pitch | 0.375″ |
| Support | Official Pololu product search and support resources linked below |
Official resources
Find this product on Pololu | Pololu support and resources
What’s in the box
1 × QTR-3RC Reflectance Sensor Array
Frequently Asked Questions
Is this only for line-following robots?
No. It can also be used for reflectance and simple proximity tasks.
No. It can also be used for reflectance and simple proximity tasks.
Do I need an analog pin?
Not always. QTR RC sensors are read by timing the output decay with digital I/O.
Not always. QTR RC sensors are read by timing the output decay with digital I/O.
Does surface color matter?
Yes. Dark and light surfaces reflect very differently, so calibration is recommended.
Yes. Dark and light surfaces reflect very differently, so calibration is recommended.
QTR-3RC Reflectance Sensor Array
QTR-3RC Reflectance Sensor Array
Low stock: 4 left
Product Code
SKU:POL2457
Regular price
₱ 269.00
Regular price
Sale price
₱ 269.00
Unit price
per
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