2812

2812 is a natural number that follows 2811 and precedes 2813. In mathematics, it is an even, composite number with prime factorization 2^2 × 19 × 37. It is not a prime, and it is not a perfect square. In common notations, decimal 2812 corresponds to hexadecimal 0x0AFC and Roman numerals MMDCCCXII.

In electronics and maker culture, 2812 commonly refers to the WS2812 LED driver and LED cluster. The WS2812 is a family of individually addressable RGB LEDs with an integrated controller in a 5050 package. They are typically powered from 5V and deliver 24-bit color per LED. Data is sent in a single-wire serial stream at about 800 kHz, with the data output passing the remaining data to subsequent LEDs in the chain. Each LED’s maximum current is around 60 mA at full brightness, yielding about 0.3 W per LED. They are widely used in addressable LED strips, pixel displays, and decorative lighting, often daisy-chained in long runs. Color order is commonly GRB, though some variants and libraries may use RGB.

Other uses of the notation 2812 are limited; as a number it primarily serves mathematical or calendrical contexts, and in technology it is most often associated with WS2812-based LED hardware.