LED matrix controller provides ultra-smooth fade
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By
Julien Happich
Since the human eye is more sensitive to dimmer light, this gives the impression of a completely smooth and even change in brightness, with no perceptible steps or flickering. Conventional luminance control is in even steps which appear uneven to the eye due to its variable response to brightness.
The 7x7mm IC is controlled through a serial bus connection, which allows up to 15 ICs to be connected on the same communication line. The 24 constant current outputs deliver a maximum current of 80mA per pin. They can be configured to support arrays of 16×8, 24×4, 24×2 or 24×1 LEDs. The brightness of each individual LED can be greater with the smaller arrays.
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