Red LED Indicator Module — Digital Output, Arduino

Red LED Indicator Module — Digital Output, Arduino (KY-011 Compatible)

The red LED indicator module is the simplest and most beginner-friendly LED component for Arduino projects. Unlike bare LEDs that require a separate current-limiting resistor and careful wiring, this module has the current-limiting resistor pre-installed on the PCB — simply connect VCC, GND, and a digital output pin, and the LED is ready to use with no additional components required.

Compatible with the popular KY-011 LED module pinout, this module integrates directly into Arduino sensor kits and 37-in-1 sensor kit projects. The 3-pin module format is breadboard-compatible and fits standard Arduino sensor shield connectors.

Key Features

• Pre-installed current-limiting resistor — no external resistor required; connect and use immediately
• KY-011 compatible pinout — direct integration with Arduino sensor kits
• Digital control interface — on/off control via single Arduino digital output pin
• 3-pin module format — VCC, GND, Signal; breadboard and sensor shield compatible
• Red LED color — universal stop/error/alert indicator color
• 3.3V and 5V compatible — works with Arduino, ESP32, and Raspberry Pi

How to Use with Arduino

• Connect VCC to Arduino 5V (or 3.3V)
• Connect GND to Arduino GND
• Connect Signal to any Arduino digital output pin
• Set the digital pin HIGH to turn the LED on, LOW to turn it off
• No resistor required — the module PCB includes the current-limiting resistor

Typical Applications

• Arduino beginner projects — the easiest LED module for first Arduino projects
• Status and error indicators — red LED for fault, error, and alert indication
• Arduino sensor kit projects — KY-011 compatible for 37-in-1 sensor kit projects
• Robotics and automation — fault and status indicator LEDs
• Educational electronics kits — STEM and electronics learning projects

Technical Specifications

• LED Color: Red
• Control: Digital (HIGH = on, LOW = off)
• Interface: 3-pin (VCC, GND, Signal) — KY-011 compatible
• Supply Voltage: 3.3V – 5V
• Onboard Resistor: Yes (no external resistor required)
• Brand: Keszoox
• Origin: Mainland China

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