CartoLucci: A Candle-Powered Christmas Card


If you’re looking for a last-minute Christmas present, you probably won’t have enough time to reproduce [Helmar's] candle-powered Christmas card. He’s been working on it for a few years now, since his first prototype in 2010.¬†Though he pieced together the original card with parts lying around his workshop, the most recent iteration looks like it belongs on the shelf in a store.

We last saw [Helmar's] work two years ago, when he shared his Full Color Laser TV. This project is a bit more compact: the circuitry was printed with conductive ink on the cardstock, and all the required components are held together by conductive adhesive. To power the electronics, he decided against a battery and instead chose to embed a solar cell on the inside of the card. Placing a lit candle inside the open card provides enough juice for the exterior of the card to shine.

You can see a video of both the current and prototype versions of [Helmar's] cards after the break.


  1. aztraph says:

    That second one needs some backing so you don’t get a ghost image of the electronics to spoil the effect. they are really neat though

  2. I think that is beautiful. Thanks.

  3. ANC says:

    Two thoughts came to mind: Beautiful. Fire hazard.

  4. Elf_Boy says:

    Nice card. Speaking of Christmas, I just got an Arduino Yun and an Arduino Due.

  5. XOIIO says:

    Cool although yes, it’s a potential fire hazard.

    I thought it ran on heat somehow when I saw that big metal plate in the preview image.

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