Generic 4-Channel IR Line Tracking Sensor Module - TTL Output, 1mm-60cm Range

The module provides a direct TTL-level digital output for each of its four channels. When the IR light is reflected back (detecting a light-colored surface), the corresponding output pin goes to a logic LOW state. When no reflection is detected (a dark line), the output remains at a logic HIGH state. This signal can be read directly by any microcontroller's digital input pin.

Each sensor channel has its own onboard potentiometer. Turning the potentiometer adjusts the current to the IR LED, which directly affects its intensity and thus the detection range. Clockwise rotation typically increases sensitivity (longer range), while counter-clockwise rotation decreases it. Fine-tune each pot while testing on your specific surface material to achieve optimal performance between 1mm and 60cm.

The modular two-part design separates the IR emitter/detector pairs (on the small forward head) from the main control board. This allows for flexible mechanical mounting, enabling you to position the sensors at the front of a robot or in a tight space while keeping the main electronics board secured elsewhere. They are connected via the provided 6-wire cable harness.

Yes. The module's operating voltage range is 3.3V to 5V DC. You can power it directly from the 3.3V or 5V pin of your development board. The TTL output levels will correspond to the supplied VCC voltage, making it directly compatible with the logic levels of both 3.3V systems (ESP32, Raspberry Pi) and 5V systems (Arduino Uno) without requiring level shifters.