https://www.emusic-diy.org/ 2026-05-01T01:02:15+00:00 https://www.emusic-diy.org/ https://www.emusic-diy.org/_media/wiki:dokuwiki.svg text/html 2024-07-28T22:47:46+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.emusic-diy.org/schematics:seqs:etiseq?rev=1722206866&do=diff ETI 603 Sequencer * [ Page One] - Specs and photograph * [ Page Two] - Schematic * [ Page Three] - Front panel and PCB layout * [ Page Four] - Article, parts list, and parts layout * [ Page Five] - Front panel wiring diagram and photograph of finished unit ---------- Circuit Boards Circuit boards for this and other ETI projects are available for $22.00 Australian plus postage and handling from: text/html 2024-07-28T22:51:21+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.emusic-diy.org/schematics:seqs:miniseq?rev=1722207081&do=diff Oberheim Mini-Sequencer [ Schematic for the Oberheim Mini-Sequencer] ---------- Theory of Operation - Quantizer The counter's lowest six bits feed the DAC, while the seventh bit forms A7 & A7* to toggle between the two sequencer CV signals in the multiplexer. This way only one DAC is needed for each sequencer CV, that's why there's a two channel multiplexer. The output of the DAC is a cyclic ramp waveform with discrete steps, which can be reset by the sequencer clock. The counter's clock at …