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SK6805-2427 LED is a smart LED control circuit and light emitting circuit in one controlled LED source, which has the shape of a 2427 LED chip. Each lighting element is a pixel, and the intensities of the pixels are contained within the intelligent digital interface input. The output is driven by patented PWM technology, which effectively guarantees high consistency of the color of the pixels. The control circuit consists of a signal shaping amplification circuit, a built-in constant current circuit, and a high precision RC oscillator.
http://www.normandled.com/index.php/Product/view/id/835.html