The DMX/MIDI interface described in the September 2001 issue is extremely flexible and suitable for nearly all applications, but it is a rather complex circuit. By contrast, the interface described here is the height of simplicity with regard to both construction and programming, even under Windows.The DMX protocol has already been the subject of several articles in Elektor Electronics. Consequently, here we will describe only the essential points in order to refresh your memory. Readers who are interested in the technical details of the protocol are referred to the article in which it is described (‘DMX512 Revealed’ in the May 2001 issue) and to various DMX designs that have subsequently appeared in Elektor Electronics (‘MIDI/DMX Interface’ and ‘DMX Demultiplexer’).