Those ubiquitous "Candle Flicker" LEDs are fascinating in more ways than one. There is plenty of information on the internet about getting an audio signal from a flicker LED. They seem to either play a tune or produce a weird sort of "music" reminiscent of a cheap sci-fi movie. The one I first exp...By: gizmologist
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from Instructables: exploring - technology - robots http://ift.tt/1tNZy6B
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