Led Birthday Candle
From the MAKE Flickr photo pool

Member Laen built this LED birthday candle, “Made from a home-made flip-flop circuit, a pill bottle, and some foil.”

The foil protrusion at the top may look like a wick, but it’s actually a contact for a breath controlled switch – if it’s blown into contact with the left side, the LED below turns off; blow it to the right and the circuit resets turning the light back on. Clever design!

Check out Laen’s photo set for more details

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