# Line sensor module, QRE1113, IR, 5V

> Line sensor module QRE1113 with IR LED and phototransistor, operating at 5V with digital DO output. Current consumption approximately 25mA, recommended detection distance up to 3 mm. 3-pin connector (VCC, OUT, GND) with 2.54 mm pitch, board dimensions 8 x 14 mm, includes mounting hole. Suitable for line following and contrast detection in robotics.

- Page: https://sigmanortec.ro/en/line-sensor-module-qre1113-ir-5v
- Price: 9.52 RON
- Availability: In stock; 1-2 zile
- Reference: 11001 · EAN: 5943132013997
- Category: Mechatronics and IoT > Sensors and Modules > Light and Optical Sensors
- Specifications: Supply voltage: 5 V; Sensor chip: QRE1113; Connection type: IR
- Package (shipping data): 0.002 kg
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:33 (Europe/Bucharest)

## Description

The IR reflective sensor module is ideal for line tracking and black and white contrast detection in robotics projects. It integrates an IR LED and a phototransistor with on-board conditioning for digital output DO, operates at 5V and connects quickly via a 3-pin header. The compact dimensions and mounting hole make it easy to mount, optimal for small distances up to 3 mm.
The QRE1113 module is an IR reflection sensor, ideal for robotics and automation projects where you need to detect lines or contrast differences between surfaces.
It integrates an infrared LED and a phototransistor, and the signal is conditioned on the board so you can quickly obtain a digital output compatible with microcontrollers.
It detects light-colored surfaces that reflect more and dark-colored surfaces that reflect less very well, making it suitable for line followers, counting objects at short distance, and edge detection.
The board has a 3-pin connector, compact dimensions, and a mounting hole for easy installation.
Specifications:
Supply voltage: 5VDC
Model: QRE1113
Sensor type: infrared IR reflection
Current consumption: approximately 25mA
Output: digital DO
Compatibility: digital inputs without ADC, including 3.3V and 5V depending on the development board
Recommended detection distance: maximum 3 mm
Connector: 3 pins 2.54 mm pitch
Mounting: mounting hole on the board
Board dimensions: 8 x 14 mm
Pinout:
Pin
Marking on board
Description
Typical connection
1
VCC
Module power supply
5V, sometimes also works at 3.3V
2
OUT
Digital output
MCU digital pin, HIGH/LOW output
3
GND
Ground
GND to microcontroller
Usage:
Connect the pins as follows:
QRE1113 Module
Arduino UNO/Nano
Arduino MEGA
Notes
VCC
5V
Some variants also work at 3.3V, 5V recommended for stable signal
GND
Common ground mandatory
OUT
D2, D3, D4 etc
Any digital pin works, for interrupts use D2 or D3 on UNO
Mount the sensor as close as possible to the surface, ideally up to 3 mm, and maintain a constant distance for stable results
For line following:
Calibrate the threshold in code by reading OUT on white and black, position the sensor perpendicular to the surface.
For object detection at short distance:
Point the sensor towards the passing area, use software debounce to avoid multiple triggers.
If the signal is unstable:
Check strong ambient lighting, shield the sensor from direct light and adjust the distance until the switching becomes consistent.