Product Description
The QTR-8RC Reflectance Sensor Array is a high-precision line-sensing solution designed for high-performance robotics. Unlike standard analog sensors, the RC version uses a capacitor discharge circuit, allowing each of the 8 sensors to be read by a single digital I/O pin on your microcontroller. This module is the industry standard for line-following robots, grid navigators, and maze solvers. Its high-density layout ensures that even thin lines are detected with extreme accuracy, providing the reliable feedback necessary for smooth PID control at high speeds.
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Detailed Key Features
Advanced RC Timing Logic: Each sensor output is measured by the time it takes for a capacitor to discharge, allowing for precise reflectance readings using only digital pins—no ADC required.
Separable Design: The module is engineered with a breakaway point, allowing you to cut off the last two sensors to create a 6-sensor array and a separate 2-sensor module for tighter chassis designs.
Integrated LED Control: Features a dedicated "LEDON" pin that allows the microcontroller to turn off the IR emitters to save power or to measure ambient light interference.
High-Density Sensor Pitch: Sensors are spaced at exactly 9.525mm (0.375"), providing a wide sensing field that can track lines effectively even during sharp turns.
Robust Noise Filtering: The digital discharge method is inherently more resistant to electrical noise than standard analog voltage dividers.
