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A DMX controller is used to create and control stage lighting and effects through digital data transmission between the controller and the lighting equipment and accessories. There are incredible possibilities to create spectacular lighting and effects with today’s devices, but a powerful and intelligent control system is needed to accomplish this—that is where the DMX controller comes in. A DMX controller can be used for anything from a string of lights to an electronic billboard, although it is primarily used for more advanced lighting fixtures and special effects devices such as fog machines and Club Lasers.
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A DMX can control the lighting and effects after it has been wired to the devices. Each device is assigned to a different identification number, which will then allow you to control the device through the DMX. These identification numbers are officially referred to as “channels,” and a DMX is capable of controlling a maximum of 512 channels. That leaves a lot of room to play!
To illustrate how a DMX works, imagine that you have three lighting fixtures that you want to control separately. To do this, you would assign each fixture to a different channel—channels 1, 2, and 3—and then wire them with the DMX. From there, you would use the DMX to do all the work. If you want full brightness on fixture 1, you would say “1:100%,” and fixture 1 would recognize its channel and then react by turning all the way up. Likewise, if you wanted dimmed lights on fixture 2 and no lights on fixture 3, you would set the DMX to “2:50%” and “3:0%,” and fixture 2 would go to half-bright and fixture 3 would turn off. This system is used not only to control the brightness, but also to change color, move around, and project shapes, allowing of course that you are working with fixtures with such capabilities. It is also important to note that there is no limit on the number of fixtures set to each individual channel. You can assign several different fixtures to the same channel, and they will all come on, turn off, and change together.
The only thing that is required of a DMX controller is a power source. A DMX only controls information; it does not power itself.
As you can imagine, a DMX controller can make all the difference in a spectacular light show pulled off with ease. A DMX allows you to control almost anything quickly and easily, and it will help you reach the full potential of modern lighting and effects.
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