LED Traffic Light Signal Module with Digital Output

The LED traffic light signal module gives you three LEDs — red, yellow, and green — on a single PCB ready to use at 5V DC. Each LED measures 10x7mm, which is large enough to see clearly from across a desk. The traffic light module uses a common cathode (shared ground) interface, so you need only one ground wire and three separate signal wires from microcontroller board.

One non-obvious detail is that the green led draws 25mA while red and yellow draw only 13mA, so set current-limiting resistors separately for green or it dims faster than the others. Makers and hobbyists use led traffic light signal module for Arduino timing projects and robotics signal demos. Connect the three signal pins to any digital output pins and control each colour with a digital sketch. StemVolt provides this sensor with trusted quality, ensuring reliable performance and easy usability.

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Features:

• Operates at 5V DC supply which matches directly with Arduino and ESP32 boards
• Red and yellow LEDs draw 13mA each allowing direct GPIO pin drive without extra circuits
• Green LED draws 25mA so a small current-limiting resistor keeps it at safe brightness
• Common cathode interface simplifies wiring by using a single shared ground connection

Technical Specifications:

Applications:

• The school science project uses this to show traffic signals change over time
• An LED traffic light signal module controls a toy car crossing with Arduino digital pins
• A robotics demo reads intersection sensor data and switches lights based on vehicle count

Package Includes:

• 1 x LED Traffic Light Signal Module