TCRT5000 Dual Channel Line Tracking Sensor Module - Infrared Reflective Detection

The module operates from 3.3V to 5V DC, making it directly compatible with most microcontroller development boards like Arduino (5V), Raspberry Pi (3.3V), and ESP32 (3.3V). Ensure your power supply can provide the required ~15mA current for stable operation.

Connect VCC and GND to your power source. The Digital Output (DO) pin provides a clean high/low signal based on the comparator threshold, ideal for simple detection tasks. The Analog Output (AO) provides a variable voltage proportional to reflected IR intensity, useful for precise threshold calibration or grayscale detection when connected to an ADC pin.

Use a small screwdriver to turn the onboard potentiometer. Clockwise rotation typically increases sensitivity (detects lighter surfaces at greater distance). The optimal sensing distance is approximately 3mm, with a functional range of 1mm to 8mm. Calibrate over your specific track surface for best performance.

Primarily designed for high-contrast detection (e.g., black vs. white), its analog output can differentiate shades of gray based on reflectivity. For reliable color detection, a dedicated RGB color sensor is recommended. This module excels at binary line tracking and proximity sensing.

The updated pin order (from left to right, viewing the component side with pins at the top) is: 1) VCC, 2) Digital Output (DO), 3) Analog Output (AO), 4) GND. Always verify with a multimeter before connecting to avoid damage.