It took a lot of tweaking — and a lot of MOSFETs — to get the candle to produce a stable flame. But once it did ... about mitigating RF noise. He does his experiments inside a steel-reinforced ...

1. Ask the adult you are working with to light the candle. 2. Watch the candle flame start out small and get bigger. Notice how some of the wax near the wick melts. 3. As the flame burns, the wax from ...