SPECIFICATIONS

️ Smart 4-Wire, Precise Avoidance! KY-032 IR Sensor – Your All-in-One Solution for Line Tracking & Obstacle Avoidance

Adjustable detection range 2-40cm, compatible with 3.3V/5V MCUs, stable TTL output! Unique Enable (EN) pin supports power-saving control. Effective for line tracking even on complex surfaces like cement or soil.

Key Features & Benefits

4-Wire Design, Fully Functional: Beyond basic power and signal, includes an Enable Control Pin (EN). Short EN to GND to operate, or control it via MCU for system-level power management.

Dual Potentiometer Fine-Tuning: Features two multi-turn adjustable resistors for precise calibration of IR emission frequency (tuned to 38KHz) and detection sensitivity, ensuring optimal performance on various surfaces.

Wide Voltage, High Compatibility: Operating voltage 3.3V to 5V allows direct connection to Arduino, ESP32, Raspberry Pi, etc., without level shifters.

Strong Environmental Adaptability: Modulated IR light resists interference. Suitable not only for standard white paper/black lines but also for stable black line tracking on dark, complex backgrounds like cement or soil.

Digital Output, Ready-to-Read: Outputs TTL level directly (LOW 0 for obstacle detected, HIGH 1 for clear). Easy for MCU to read with simple programming and fast response.

Product Description

The EGBO KY-032 is a high-performance digital infrared sensor for obstacle avoidance and line tracking. It detects objects by measuring reflected infrared light and converts the result into an easy-to-process digital signal. Its adjustable range, dual-tuning mechanism, and enable control make it ideal for educational robots, smart racing cars, automated inspection, and more.

️ Important Notes / How to Use (Must Read Before Use!)

Connection Wires & Jumper Cap ARE REQUIRED! This is a bare module. It does NOT include DuPont wires or jumper caps. You will need:

4x Female-to-Female DuPont Wires to connect VCC, GND, OUT, EN pins.

1x 2Pin Jumper Cap or a short wire to short the EN pin to the GND pin. This is ESSENTIAL for the module to function.

Detection Distance Varies by Object: Most sensitive to white, reflective objects (up to ~40cm). Distance reduces significantly for black, light-absorbing objects. Always calibrate using your actual target.

Setup & Tuning for Line Tracking: For line following, mount the sensor vertically downward, 1-2 cm above the ground. First, adjust the 502 resistor (frequency) to find the strongest signal point. Then, adjust the 103 resistor (threshold) to set the desired triggering distance, ensuring a clear HIGH/LOW output difference between the background and the black line.

Enable (EN) Pin Usage:

Default Operation: Use a jumper cap to short EN to GND.

Power-Saving Mode: Remove the jumper. Connect EN to an MCU GPIO. Output LOW (0) to activate the sensor, HIGH (1) to put it to sleep.

Avoid Direct Strong Light: Avoid pointing the sensor lens directly at sunlight or other strong IR sources.

Pin Definitions (4-Pin)

- : Power Ground (GND)

+ : Power Positive (VCC: 3.3V-5V)

S : Signal Output (OUT) - Outputs LOW (0) when obstacle is detected, otherwise HIGH (1)

EN: Enable Pin (ENABLE) - Must be shorted to GND for the sensor to operate, or connected to MCU for control.

Specifications

Model: KY-032

Operating Voltage: DC 3.3V – 5V

Operating Current: ≥ 20mA

Detection Range: 2cm – 40cm (Adjustable, affected by object reflectivity)

Output Signal: TTL Level (Obstacle: LOW; Clear: HIGH)

Adjustment: Multi-turn Resistor Adjustment (Frequency/Sensitivity)

Effective Angle: 35°

Interface: 4-wire interface (-/+/S/EN)

Dimensions: Approx. 45mm x 11mm

Package Includes

1 x KY-032 Infrared Obstacle Avoidance Sensor Module
(Please note: This is an electronic module. DuPont wires, jumper caps, or other connectors are NOT included. You need to prepare or purchase them separately.)