The original LED lanterns were featured in MAKE: Magazine, issue 30. When I first saw the article, I thought that they could only be used once, as they would have to be glued shut. When I read it, I realized that they were sealed with tape, and could therefore be opened, but not before I […]
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I have always hated mowing the lawn. I was the guy who only mowed when the grass got to be 6″ taller than the neighbors’ lawns — not because I don’t like my neighbors, but because mowing was such a pain. After being hit by one too many rocks, I decided I no longer wanted […]
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This simple, wearable circuit uses an operational amplifier (or “op-amp”) chip to convert sound into light. An LM324 op-amp and a transistor boost input from a mini condenser microphone to light a series of LEDs. Watch it blink to the beat of your favorite music. Check out more Weekend Projects.
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