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Code lock

Velleman K6400 Digital Code Lock Kit

Velleman K6400

Pushbutton Digital Code Lock Assembly Kit (Soldering Required)

Toss away those keys and step into the digital age with the Velleman K6400 code lock.  Our easy-to-use digital code lock kit can be used as an alarm switch, door lock, as well as any other number of operations.

The K6400 9-digit code panel (9-15 VDC or 8-12 VAC) is completely sealed, making it ideal for indoor or outdoor use.  

With a secret 4-digit code, more than 3,000 code combinations exist.  You have 5 seconds to enter your code.  You’ll know when your code has been entered successfully thanks to the LED status indicator on the operating panel.



  • 3000+ Code Combinations (4-digit code)
  • Relay Output: 5A / 110V
  • Code Entry Time Limit: ± 5 seconds
  • Power Supply: 9 - 15V DC or 8 - 12V AC
  • Power Consumption:
    • Output on: 40mA
    • Output off: 0.3µA
  • Dimensions:
    • Front panel: 3.15 x 3.15"
    • Depth: 1.6"

Additional Information

Difficulty Level 2


Parts list
English assembly instructions through illustrations, pictures, etc.

Assembly instructions
Written multilingual manual explaining how to build the kit.

Info Sheets

Resistor colour code

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