KY-033 1 Channel Line Follower Tracker

The KY-033 is an infrared (IR) line-tracking sensor module used in robotics. It helps microcontrollers detect transitions between light and dark surfaces.Technical Profile

• Core Sensor: TCRT5000 optical sensor
• Voltage: 3.3V to 5V DC
• Output: Digital TTL signal (HIGH or LOW)
• Detection Range: 1mm to 2.5cm

Pinout Configuration

• VCC (+): Power supply (3.3V / 5V)
• GND (-): System ground
• OUT (S): Digital signal output

How It Works

• White Surface: Reflects IR light. Output goes LOW. Onboard LED turns on.
• Black Surface: Absorbs IR light. Output goes HIGH. Onboard LED turns off.
• Calibration: Uses an onboard potentiometer to adjust sensitivity for ambient light.