5V Traffic Light LED Module (Red/Yellow/Green), 3-LED Signal Indicator Board for Arduino & DIY Projects

Create realistic signal simulations and interactive learning projects with a 5V traffic light LED module featuring red, yellow, and green LEDs. This compact indicator board is designed for Arduino and DIY electronics projects where you want a clear visual output for timing, sequencing, and logic control. It’s a popular module for STEM education because it makes programming concepts easy to understand: you can instantly see the effect of delays, loops, state machines, and sensor triggers by watching the lights change in sequence.

The module includes three separate LEDs arranged like a standard traffic signal—red for stop, yellow for caution, and green for go. Each LED can be controlled by your microcontroller to create realistic patterns such as normal traffic cycles, pedestrian crossings, warning flash modes, or countdown-based sequences. It’s also useful beyond “traffic” demonstrations: you can use the three LEDs as a general status indicator for your project, such as showing power state, connectivity, error status, or process steps (for example: running, waiting, completed).

Because it operates at 5V, this module integrates easily with Arduino UNO and similar boards. It can also be used with many other microcontrollers; for 3.3V systems like ESP32, the module may still work depending on the design, but you should confirm compatibility and use proper wiring to protect your GPIO pins. The simple pin layout makes it easy to connect and test quickly on a breadboard or in a permanent installation. Many makers use it in classroom labs, robotics demos, model city projects, and small control panels.

This traffic light module is excellent for practicing key electronics and programming skills. You can learn how to set digital outputs, manage timing, build repeatable sequences, and use inputs (like buttons or sensors) to change behavior. For example, you can create a junction controller that changes to yellow when a button is pressed, or a safety indicator that turns red if a sensor value exceeds a threshold. Because the LEDs are bright and easy to see, it’s perfect for presentations and demonstrations.

For best results, mount the module securely using its holes and avoid bending the pins repeatedly. If you are building a larger display or controlling multiple modules, consider using driver circuits or expanders so you don’t run out of GPIO pins. Always confirm polarity and pin labels before powering the module.

Included: 1× 5V traffic light LED module with red, yellow, and green LEDs. A simple and effective add-on for Arduino learning, robotics indicators, and DIY signal simulation projects.