We’ve recently described the principle of DMX512-based remote control, which allows automated projectors or flood lights to be controlled on up to 512 channels, via an RS485 link. Every DMX system comprises a master and several slave devices responding to DMX commands.Actually, there are two approaches for the realisation of a DMX512 master: either a dedicated controller is used (such as the MARTIN2518, for example), or software running on a PC.The main advantage of the first approach lies in its simplicity and low cost. On the down side, the capabilities, especially in programming and memory, are generally limited. Moreover, the user interface of some of these controllers is sometimes original if not odd, to put it mildly.As always, the use of a PC with a DMX interface allows you to do almost everything, while offering unbeatable capabilities. Actually, there is almost no concert, public event or TV show without some form of PC-controlled (stage) lighting.