It even releases smoke when “blown” out
This potentially unnecessary albeit nifty creation is the product of Keith’s Test Garage and the duration of the three years it took to complete this interesting side project. Keith sought out to create a seemingly realistic candle that looks, lights, flickers, blows out, smokes, and even smells real while being completely digital.
An Arduino Pro Mini covered by real candle wax powers six LEDs that are randomly offset in intensity to mimic the realistic flickering of a flame. While many available digital candles already achieve this Keith took it a few steps further. The candle can be turned on by placing a live match inside, which is detected by an infrared sensor that then activates the LEDs. However, the most impressive feature is the actual smoke produced by the wick covered in vegetable glycerin. When blown upon the wick is shocked to produce the smoke after a microphone detects the exhalation.
https://gizmodo.com/guy-spends-three-years-making-an-ultra-realistic-led-ca-1833325891













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