Leaderboard
Popular Content
Showing content with the highest reputation since 10/22/2009 in Image Comments
-
2 points
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
OC is VERY similar to yarns but those are all 4 channel devices.. The way I went about it it was just like this thing: https://github.com/westlicht/performer-hardware/blob/master/sequencer.pdf 8 channel 16 bit DAC (DAC8568) and same output stage as Yarns using the internal reference of the DAC (Not the power rails like AOUT, yarns uses an external reference also). I started working on the board but other things got in the way and its on hold. It was a small modular type device that was supposed to be plugged into the back of my 10hp breakout1 point
-
1 point
-
1 point
-
@Antichambre This an old project, but I'm still not finished the control surface. Enclosure has taken from old soviet "MICRO" calculator Elektronika MK-44 but it has no main PCB, so I'm still searching for another one to take keyboard from it for more authentic look Rio asked me for the project files, so I've uploaded everything to public. Yes, design is based on Olivier's original Shruthi-1 CEM filter board, other parts is quite standard except OLED - CORE8 PCB with MidiboxSID v2.042, Stereo SID6581 PCB and AOUT_NG. PSU is taken from old DVD player - +5/+12/-12 volts, CEM VCF powered with +12/-12V. The only one noisy part is OLED's boost converter, I was thinking of powering it directly from +12V rail, should fix the problem.1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
Oh, all three front panels have used row drivers; in MIDIbox ASIDITY it was a bunch of TO220 NMOSFETS, in MIDIbox FM V2.0 / V2.1 it was a Darlington array, and in this one it's eight TO92 NMOSFETS, they're right next to the orange LEDs in teh middle. Obviously the shift register pins can't sink >1 amp! But I don't quite understand the issue--MIDIboxes have been using BLMs with this scheme for 15 years. And in fact, since only one row is on at a time, having 8 or 16 rows from each pin of the shift register is just the same as having each shift register pin drive one single LED by itself. That's what the DOUT module is specifically designed for. You're right about PWM, but I don't use dimming on any of these panels. :) I don't find that it's terribly useful to convey information to the user.1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point
-
1 point