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LetterBeacon
Joined: Mar 18, 2008 Posts: 454 Location: London, UK
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Posted: Mon Mar 11, 2013 5:19 pm Post subject:
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I'd be up for a board! |
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emdot_ambient
Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD
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Luka
Joined: Jun 29, 2007 Posts: 1003 Location: Melb.
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oldbob
Joined: Jun 18, 2008 Posts: 18 Location: Australia
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Posted: Thu Mar 14, 2013 2:31 pm Post subject:
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Count me in for PCB, thanks.
oldbob
So many modules, so little time. |
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wmonk
Joined: Sep 15, 2008 Posts: 528 Location: Enschede, the Netherlands
Audio files: 15
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Posted: Sun Mar 17, 2013 11:58 am Post subject:
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I finally got around building mine, and after a lot of wiring (yuck, those switches o_O) it basically works.
Although.... my CV output gives a nice and steady -13.92V. (Indeed /the/ typical value of a TL074 clipping.)
I would like to fix this of course. What I already checked: voltage on potentiometer wiper is okay. Voltage on the PCVS bus is okay.
Voltage on the PORT1 pin is -13.92V. (again that magical number).
So, what should I do to fix this?
Cheers,
Woody
Edit: forgot to mention that I'm using V2.0 firmware. _________________ Weblog! |
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ryktnk
Joined: Apr 24, 2008 Posts: 285 Location: london
Audio files: 1
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Posted: Sun Mar 17, 2013 1:47 pm Post subject:
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wmonk wrote: |
Voltage on the PORT1 pin is -13.92V. (again that magical number).
So, what should I do to fix this?
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Hello
Oh dear, that sounds a bit strange.
Please check there are no shorts around the TL704.
PORT1,2 just feed the big capacitor that hangs on an input
of the TL704 [simple lag circuit] so have a look
at the big cap for any shorts [sorry I haven't go my circuit with me
so can't tell you the part no.s at the moment ]
I am away on business this week, so cant check my
circuits this week.
I will try and work out some help when I am back next week, sorry.
-ryk |
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emdot_ambient
Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD
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Posted: Wed Mar 20, 2013 7:52 am Post subject:
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ryktnk wrote: | I am away on business this week, so cant check my
circuits this week. |
That's what DropBox is for _________________ Looking for a certain ratio since 1978 |
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wmonk
Joined: Sep 15, 2008 Posts: 528 Location: Enschede, the Netherlands
Audio files: 15
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Posted: Wed Mar 20, 2013 8:43 am Post subject:
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Well, replacing the opamp fixed the problem.
I now have it working and I love it! One problem still exists, whenever I turn a stage to three steps, it skips the whole stage it altogether.
Cheers,
Woody _________________ Weblog! |
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ryktnk
Joined: Apr 24, 2008 Posts: 285 Location: london
Audio files: 1
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Posted: Tue Mar 26, 2013 12:49 pm Post subject:
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wmonk wrote: | Well, replacing the opamp fixed the problem.
I now have it working and I love it! One problem still exists, whenever I turn a stage to three steps, it skips the whole stage it altogether.
Cheers,
Woody |
Hello
Sorry for the delay - back on dry land !
Glad the CV problem is fixed.
The stage count problem, sounds a little strange.
Can you check the voltage on the CT [stage count] bus.
It is pin 18 of the PIC chip, or from the CT pad on the PCB.
If you stop the clock on the seq, and then push the PREV button
to get to stage "1"
Adjust the Stage Count for stage "1' and check the CT voltage:-
Use a DVM to check the CT voltage [pin 18 of PIC].
It should read 0V if the stage is set to "1" count
and approximately
0.8V for "2" count
1.4V for "3" count
2V for "4" count
2.6V for "5" count
3.2V for "6" count
3.8V for "7" count
4.6V for "8" count
Perhaps also check the stage Mode MD voltage [pin 19 of PIC, of MD pad on PCB]
Adjust the Stage Mode for stage "1", and check the voltage for each setting.
0V for "-"
1.8V for "1"
3.1V for "11"
4.5V for "1-"
Also double check carefully there are no shorts on the PCB
between any of the PIC chip pins, and make sure that MD, CT,MAX
MODE,SDIV wires from the switches and pots are wired to their
corresponding pads on the PCB.
Lastly, it might be worth checking all the diodes from the
POT1-8 bus, to make sure their polarity is correct.
Please refer to the Panel Wiring PDF on the first page of this thread.
Let me know how you get on.
-ryk |
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panda30y
Joined: Apr 12, 2009 Posts: 17 Location: Detroit, Michigan
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Posted: Fri Apr 05, 2013 9:07 am Post subject:
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If you do another run, I'd be interested in 2 or 3 board and switch sets. |
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synchromesh
Joined: Dec 02, 2007 Posts: 4 Location: Norfolk, England & Wellington, New Zealand
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Posted: Wed May 01, 2013 9:30 am Post subject:
Yes please! |
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Hi, I'd be keen on a couple of PCBs & PICs myself, once version 3 is ready. This seems like a highly-regarded sequencer module, and I think it would be great.
Thanks very much for putting this together! |
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noiselector
Joined: Mar 30, 2013 Posts: 21 Location: France
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Posted: Thu Oct 10, 2013 6:17 am Post subject:
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I am interested in this project!
PCB+PICS+ PANEL possible??
thanks. |
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aladan
Joined: Aug 13, 2011 Posts: 52 Location: Australia
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Posted: Thu Oct 17, 2013 4:51 pm Post subject:
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Excellent! This has been at the top of my 'want' lost for some time now. I will definitely be in on this - pcb, pic, switches, everything except for a panel (I roll my own Depending on price, might pick up a few... |
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patchdub
Joined: Jan 21, 2009 Posts: 56 Location: Taos, NM
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Posted: Sun Oct 27, 2013 12:43 am Post subject:
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really hope you'll do another run of these! _________________ www.patchdub.com |
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ryktnk
Joined: Apr 24, 2008 Posts: 285 Location: london
Audio files: 1
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Posted: Sun Oct 27, 2013 3:25 am Post subject:
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Hello
Thanks for the interest.
V3 software is "kind-of" [some bugs] ready, which includes a selectable loop
mode [ useful for a,a,a,b type sequences etc ]
Working on a new hardware design, trying to squeeze in MIDI
but a bit of a tight fit at the moment.
Anybody keen on MIDI ? Is it worth the effort ?
-ryk |
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aladan
Joined: Aug 13, 2011 Posts: 52 Location: Australia
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Posted: Sun Oct 27, 2013 3:38 am Post subject:
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ryktnk wrote: | Hello
Thanks for the interest.
V3 software is "kind-of" [some bugs] ready, which includes a selectable loop
mode [ useful for a,a,a,b type sequences etc ]
Working on a new hardware design, trying to squeeze in MIDI
but a bit of a tight fit at the moment.
Anybody keen on MIDI ? Is it worth the effort ?
-ryk |
I'm pretty sure I would use that functionality (modular control over sweet modular sounds layered with digital synth sounds could be quite interesting), but I'm still just as keen even without it.
Does anyone have a good current lead on slide switches suitable for this project (with > 3 throws) that don't cost the earth?
Thanks for your great work, ryk!
Cheers,
A. |
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aladan
Joined: Aug 13, 2011 Posts: 52 Location: Australia
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Posted: Sun Oct 27, 2013 3:39 am Post subject:
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Definitely worth asking on muffs if you're looking to sell more boards, too. |
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piedwagtail
Joined: Apr 15, 2006 Posts: 297 Location: shoreditch
Audio files: 3
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Posted: Wed Oct 30, 2013 7:48 pm Post subject:
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Very interested in a set.
MIDI always helpful, maybe pin headers for a daughtercard?
R |
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sduck
Joined: Dec 16, 2007 Posts: 459 Location: Nashville
Audio files: 5
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Posted: Sun Nov 03, 2013 7:08 pm Post subject:
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ryktnk
Joined: Apr 24, 2008 Posts: 285 Location: london
Audio files: 1
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Posted: Mon Nov 04, 2013 1:19 am Post subject:
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looks familiar . . . |
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dancelwerk
Joined: Aug 28, 2009 Posts: 93 Location: berlin
Audio files: 2
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Posted: Thu Jan 02, 2014 6:46 am Post subject:
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hi Ryk, I made your sequencer a few years ago, wonderfull I use a lot, I see the video from Intellijel, and their adaptation sounds very like a 303 slide, more than my diy sequencer, for example I can't get a continuous slide like in the 303, always I get a gate between notes.
Should be your sequencer sound very closed to the 303 slide or is this a modification from Intellijel?
Is there any mod to get a continuous slide in your sequencer?
Thanks in advance.
I have 2.1 rev.
Fernando. |
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dancelwerk
Joined: Aug 28, 2009 Posts: 93 Location: berlin
Audio files: 2
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Posted: Thu Jan 02, 2014 7:09 am Post subject:
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for any confusion, i have the portamento working but is not the same portamento of the metropolis sequencer based in your sequencer, is like a little bit shy and always cut the note between notes, not legato slides. |
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ryktnk
Joined: Apr 24, 2008 Posts: 285 Location: london
Audio files: 1
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dancelwerk
Joined: Aug 28, 2009 Posts: 93 Location: berlin
Audio files: 2
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Posted: Fri Jan 03, 2014 1:15 pm Post subject:
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wowww, this is fantastic, I will put this daughter board without doubts, can you say to us how we can?. I refer the schematic and where we have to connect this doughter board, I think that many people who build this sequencer will do this add,
what do you think guys????
of course if is possible this add.....
Thanks in advance. |
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ryktnk
Joined: Apr 24, 2008 Posts: 285 Location: london
Audio files: 1
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