Electrical engineer and tinkerer Michael Ciuffo created this clever DIY Electronic Birthday Candle, which actually goes out when you blow on it, for his girlfriend’s birthday!
So the concept here is pretty simple. I wanted to mount a microphone on a stick with an LED and design a circuit that would react to a large amount of noise on the microphone input (blowing) to turn off the LED.
[via Adafruit]
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