Power is supplied either via USB, or if a power supply (9 to 12 volts) is connected, from the power supply. To meet the USB bus specifications the microcontroller is powered with 3.3 Volt. The board measures 100x100mm and is designed to be mounted in a robust aluminum case from Reichelt. The schematic of ilLUminator was used as a reference for the galvanic isolation, but it was modified a bit and extended by an external power supply. The original is small enough to fit into an XLR connector, but does not provide a galvanically isolated output, nor the option of an additional power supply or USB socket for connecting cables of the required length. It is based on an Atmel Mega8 microcontroller, and is compatible with many lighting control programs. The uDMX is an open source ( GPL v2 licensed) USB to DMX interface for controlling professional lighting equipment.
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