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June 22, 2011 AT 4:00 pm

Does this LED sound funny to you?

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Does this LED sound funny to you? @ Evil Mad Scientist Laboratories

At first glance, these might appear to be normal 5 mm (“T-1 3/4”) clear lens ultrabright yellow LEDs. However, they’re actually “candle flicker” LEDs– self-flickering LEDs with a built-in flicker circuit that emulates the seemingly-random behavior of a candle flame.
In the close-up photo above, you can actually make out the glowing LED die on the left side, and a corresponding-but-not-glowing block on the right: the flicker circuit itself. In what follows, we’ll take a much closer look, and even use that little flicker chip to drive larger circuitry.


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