Automatic Candle Snuffers – Mechanical and Electronic

I just learned about these devices that are clever, simple, mechanical, and inexpensive — the automatic candle snuffer.

As the candle burns to a certain level, the candle no longer holds up the piece that then flips down to snuff the candle. I bet it’s close to a 100% reliability rate?

Some videos:

Here’s a more complicated electronic version for candles that are inside a glass jar, with a timer:

When possible, I’d rather have the mistake-proofing methods that are simple and mechanical, like this variation: