Product was successfully added to your shopping cart.

Go to cart page

You have successfully subscribed to this product. You will receive an email when the product is in stock.

Traffic light

Velleman MK131: 4-Way LED Traffic Light Kit

Velleman MK131

DIY 4-Way LED Traffic Light Controller / Sequencer Minikit

Build your own stop light sequencer with the Velleman MK131: 4 way LED Traffic Light Minikit. The MK131 mimics the same functions as a traffic light by cycling through the red, yellow and green LEDs. Adjust the light changing speed to match your traffic's pace with the included potentiometer. The MK131 runs on a 9V battery (not included) and uses the 9V battery holder as a stand to sit upright. 


  • Perfect for model railroads or cities
  • Adjust speed of traffic lights manually
  • Sits upright


Low Power Consumption 15mA
Power Supply 9V battery - Not Included
Dimensions 2 in. x 1.4 in. x 4.5 in.

Additional Information

Difficulty Level 2


Assembly manual

Info Sheets

Overview of Velleman modules that are equal to D.I.Y Kits
This sheet is useful when you want to know which modules you could find in the do-it-yourself range of Velleman Kits and minikits.

 Warning: this product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov/product