App note: An overview of DMX512A


An overview of (Digital Multiplex) DMX512A (PDF!) from Microchip:

This application note presents an overview of
DMX512A. It shows and explains the recommended
electrical and electronic requirements, then presents
how the protocol was implemented in the Microchip
Technology DMX512 Library. Included is a discussion
on using the back-channel capabilities.
DMX512 is the most common lighting communications
protocol used in theatrical lighting, and is often found in
architectural and other lighting systems. It was created
in 1986 by the United States Institute for Theatrical
Technology (USITT) to be a more reliable replacement
for the 0 to 10V standard, which was commonly used at
the time.

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