How would you build a digital candle someone could actually blow out? My 11-year-old daughter and I tried to answer that one evening, just for the fun of it.
We looked online to see if there were ways to detect breezes without a set of spinning cups. We quickly learned about hot-wire wind detectors, which monitor a warm wire and detect tiny changes of voltage as air passes over it.
We bought it that night, and, quite honestly, it has been sitting in my bin of parts for months. (In the meantime we built a whole bunch of candles you extinguish by tipping over.)
So for this week’s #MakeEveryWeek, I gave the blow-out candle a try.