We love this design from Lars Beller Fjetland for Hay, via dezeen.
As the wick burns, the wax melts and releases the needle, allowing the weight to swing down – pulling with it a domed cap that falls over the flame to put it out. The weight can be adjusted to accommodate candles of different sizes.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.