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<TITLE>Re: [sdiy] Rotary encoders...</TITLE>
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A really clever solution to the old problem of using real time knobs with stored presets<BR>
(the knobs will never be pointing at the preset numbers).<BR>
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The many solutions to this problem which have been tried would make a rather long article themselves. The Poly-6, OB-8 and Prophecy each have a different algorithm for dealing with the difference between the stored value and real time knob position.<BR>
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It looks like Clavia finally found a good solution, programmable knob "pointers". Very elegant, but a major increase in the panel processor I/O burden.<BR>
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My guess is the LEDs have to be networkable with a serial protocol. Perhaps I2C port expanders at each encoder for the ring of LEDs. I count 15 LEDs per encoder, that would fit with existing 16 pin expanders. I wonder what the 16th pin is being used for? Perhaps color control?<BR>
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Of course each encoder/LED group could have PIC for itself, there would be advantages to having each control have it's own intelligence. Networking and low latency updating (transmit on knob movement) come to mind.<BR>
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<B>From: </B>Peter Grenader <peter@buzzclick-music.com><BR>
<B>Date: </B>Tue, 17 Feb 2004 10:11:40 -0800<BR>
<B>To: </B><synth-diy@dropmix.xs4all.nl><BR>
<B>Subject: </B>[sdiy] Rotary encoders...<BR>
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<BLOCKQUOTE>Kids - <BR>
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Ever notice those kewwwwwwwl LEDs around the encoders used in the Nord lead 3?<BR>
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<FONT COLOR="#0000FF"><U><TT>http://www.clavia.se/pictures/nordlead3/NL3knobturnLarge.jpg<BR>
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Did Nord make that sub assembly or are those stock encoders which are made with the led bezel? I dunno, sure looks like they are stock. But whose?<BR>
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Anyone?<BR>
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Anyone? <BR>
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