The candle technology has not changed much in thousands of years – you fire a wax-soaked wick and give light for hours. It is simple, it is effective and it does not require an upgrade. So someone on the internet spent three years redesigning the candle from the ground up with digital entrails – while he managed to preserve usability in old age.
To be honest with Keith from Keith's Test Garage, he didn't spend every moment of the last three years obsessing and perfecting his candle. It was a low priority project that he would occasionally dive back if he needed a nice diversion. That being said, the attention to detail and the realistic functionality of the digital candle are proof of how long it took to make.
Powered by an Arduino Pro Mini hidden in a glass container and camouflaged with real wax, the candle uses six independent LEDs that are heavily random so that they flicker and adjust their brightness randomly up and down. The total effect is that a real flame is flying around.
However, that was the easier part, because there is currently no lack of credible LED & # 39; s candles on the market. Keith went a few steps further by first adding a carefully calibrated infrared sensor that could detect the presence of an illuminated match when it was placed in the candle, allowing the LEDs to be lit in the same way as a real one would light a candle. But the best feature is a vegetable glycerin-soaked fiberglass wick that produces a quick smoke pick when zapped with a few volts. It is activated by a microphone that detects when someone is blowing on the candle, so not only do the LEDs go out, but the candle also produces a satisfactory trail of irregular smoke that swells away.
It's an exaggeration, yes, and overkill for the sake of just seeing if it was possible at all. But if you want to add a little bit of atmosphere to your home, without the risk of being burned to the ground, this is essentially the vapor of candles, so you can get your mood-enhancing fix safely.[Keith’s Test Garage via Hackaday]