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Car light warning alarm

Velleman K3505 - Car Light Warning Alarm

Velleman K3505

Out of stock
Expected in stock on:
Apr 3, 2019

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If you’ve ever depleted a car battery by leaving your lights on, use the Velleman K3505 to ensure that never happens again. The Velleman K3505 can be used to alert the driver that the vehicle lights have been left on after the ignition is off or when the ignition is on and the vehicle lights are off. Use the Velleman K3505 Car Light Warning Alarm for you and your battery’s safety.


  • continuously repeated alarm tone for lights ON (may be disabled)
  • repeated alarm tone for lights OUT
  • only 3 wires are required for hook-up
  • supply voltage: 12V DC
  • PCB dimensions: 1.9 x 2.2"

Additional Information

Difficulty Level 2
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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

Connection diagram lights off with headlight alarm

Connection diagram lights on and off with headlight alarm

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.

Frequently Asked Questions

Q. Hello, I completed the assembly of K3505 car Light Warning Alarm kit, but I am at a loss as to how to install it into my vehicle. Can you point me to a source that would be instructive? Thanks, Charles


Under the K3505 downloads tab, there are datasheets for connection diagrams for your reference. If this still doesn't answer your question, we recommend post on our forum: https://forum.vellemanprojects.eu/

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 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