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Home / Computer Hardware, Monitors & Peripherals / Digital Gray Scale Sensor for Smart Robot Cars Red/White/Black/Green Line Tracking Single-Channel Photoelectric Line Following Module for Competitions

Attributes

Brand -
Category Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin -
Operating Voltage 3.3V - 5V DC
Output Type Digital TTL Signal
Detection Colors Red, White, Black, Green
Effective Distance 0-30mm
PCB Dimensions 40mm x 20mm x 15mm
Mounting Hole Size 3mm Diameter
Static Current < 20mA
Indicator Power & Signal LEDs
Interface 3-Pin PH2.0 Connector
Package Weight 5 grams

5 reviews

A

Anonymous

Mar 24, 2026

Rating: 5/5

Perfect for my smart car project

Works flawlessly with my Arduino Uno. The sensitivity adjustment pot is very useful for different lighting conditions.

A

Anonymous

Feb 23, 2026

Rating: 4/5

Good value but needs calibration

Solid sensor for the price. Had to spend some time calibrating the potentiometer for outdoor use.

A

Anonymous

Feb 23, 2026

Rating: 5/5

Great sensitivity

Detects the black line on white background perfectly. Also tested on green tape and it responds well.

A

Anonymous

Feb 15, 2026

Rating: 5/5

Easy to integrate

Plug and play with most microcontrollers. The digital output makes coding the line follower logic very simple.

A

Anonymous

Feb 08, 2026

Rating: 5/5

Bulk order for competition

Bought 10 units for our school team. All arrived working and consistent performance across all modules.

5 FAQ

Q: Is the output analog or digital?

A: This module provides a digital TTL output signal.

Q: Does this work with 3.3V logic?

A: Yes, it operates comfortably between 3.3V and 5V DC.

Q: Can it distinguish between red and green lines?

A: It detects contrast rather than specific color hues, but works on both red and green tapes.

Q: What is the optimal mounting height?

A: We recommend keeping the sensor 5mm to 15mm above the surface for best results.

Q: Does it come with connecting wires?

A: Yes, the package includes a 3-pin connector cable for easy setup.

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