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Entertainment lighting equipment uses a control system called DMX512. DMXCalc is a simple and elegant calculator which does address arithmetic for DMX equipment.

You can enter a DMX universe number and a device address to have DMXCalc calculate the absolute address. Or enter an absolute address to see the universe and device address.

The + and - buttons can be set to increment or decrement the address by any step size. Handy for addressing a sequence of moving lights. When there is not enough space in the current universe for another fixture, the Address and + values turn red.

Some DMX equipment utilizes dip switches to configure the address. The dip switch page has switches which show the settings for the current address value, or you can set the switches to match those on a light and discover what its address is.

A third page has a quick reference list showing all DMX level values from 0 to 255, with corresponding percentage, hexadecimal, and MIDI values.

Altogether indispensable for the entertainment lighting technician.

Known minor issue: Switch 9/256 is always off when the switches page is displayed, even when it should be on. When the address is higher than 255 (or 256 if "address 1" switch is off) then switch 9 should be on. An update is on the way!

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