Product Overview
The 3 LED Module is a compact visual indicator board featuring three LEDs (Red, Green, and Yellow) with individual current-limiting resistors. Each LED can be controlled independently, making it ideal for status indication, signal monitoring, and debugging applications.
 
Designed for plug-and-play usage, this module eliminates the need for external resistors and messy wiring.
 
Key Features
Three Independent LEDs – Red, Green, Yellow(color may vary)
Built-in Resistors (220Ω each) – Safe and reliable operation
Individual Control Pins – Control each LED separately
Common Ground Design – Simplifies wiring
Wide Voltage Compatibility – Works from 3.3V to ~9V
Compact PCB Design
Standard 2.54mm Header Interface
 
Use Cases
Multi-status indication (Power / OK / Warning)
Traffic light simulation projects
Sensor status display
Debugging multiple signals
Embedded system outputs
Educational experiments
 
Advantages
No external resistors required
Clean and organized wiring
Multiple outputs in a single module
Beginner-friendly and reliable
 
Application Examples
Traffic light system
System health indicators
Industrial status display
Arduino/FPGA output visualization
Logic testing circuits
 
Package Includes
1 × 3 LED Indicator Module (Pre-assembled)
1 x 4 pin header(un-soldered)
 
Compatibility
Works with:
Arduino (UNO, Nano, Mega)
ESP8266 / ESP32
8051 Microcontrollers
Raspberry Pi GPIO
FPGA boards (Basys 3, Tang Nano, etc.)
Any digital output system
 
Working Principle
Each LED is connected in series with a 220Ω resistor.
Apply HIGH signal to any LED pin → Corresponding LED turns ON
Apply LOW signal → LED turns OFF
You can control:
One LED at a time
Multiple LEDs simultaneously
Use PWM for brightness control
 
Notes:
Ensure correct polarity when supplying voltage
Avoid exceeding recommended voltage for long-term use. 
For long-term use, keep the voltage within 3.3V/5V range.
For PWM applications, brightness can be controlled via duty cycle
 
Weight = 2 grams
Dimensions = 1.8 cm x 1.5 cm x 1 cm