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 Forum index » DIY Hardware and Software
New sequencer project - Documentation on First Page
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ryktnk



Joined: Apr 24, 2008
Posts: 196
Location: london
Audio files: 1

PostPosted: Sat Jun 21, 2008 3:19 am    Post subject: New sequencer project - Documentation on First Page
Subject description: multi step / multi mode analogue sequencer
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Hello Forum !

[my first proper post !]

I have been making some new Roland 100m Modules, as they
have been discontinued for a while !

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Here is a link to a new sequencer I have been working on
http://www.flickr.com/photos/ryktnk/sets/72157604609909924/

and a video !
http://www.youtube.com/watch?v=vK1PoQffhjk

It has step repeat switches:- [1-8] and gate mode switches:-
[off/single/repeat/long] for each stage, plus random & pingpong mode.

It is based around a PIC, so is software update-able.

I am thinking of making a run of boards for the controller PCB
if anyone is interested . . . ?

-ryktnk


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Last edited by ryktnk on Sun Jun 12, 2011 1:09 pm; edited 16 times in total
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Floppy



Joined: May 09, 2008
Posts: 64
Location: Berlin
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PostPosted: Sat Jun 21, 2008 4:02 am    Post subject: Reply with quote  Mark this post and the followings unread

hey i saw this youtube video already and i thought it would be the original roland sequencer Smile

i would take a pcb for sure.
great work ryktnk.
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Usine Karate



Joined: Jun 09, 2007
Posts: 64
Location: Hackney Wick

PostPosted: Sat Jun 21, 2008 5:30 am    Post subject: Reply with quote  Mark this post and the followings unread

i too would be interested for sure.
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Joel



Joined: Sep 12, 2006
Posts: 97
Location: London, UK

PostPosted: Sat Jun 21, 2008 5:45 am    Post subject: Reply with quote  Mark this post and the followings unread

yep me too, that looks awesome!!
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asafnetzer



Joined: Jun 16, 2007
Posts: 112
Location: Israel

PostPosted: Sat Jun 21, 2008 8:47 am    Post subject: Reply with quote  Mark this post and the followings unread

Looks and sounds amazing, I just love the way you mounted all the components on the pcb.
Would be in for one for sure maybe two, does it all fit on one pcb ? upper side for hardware, lower for components ?

Asaf
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StephenGiles



Joined: Apr 17, 2006
Posts: 481
Location: England

PostPosted: Sat Jun 21, 2008 10:47 am    Post subject: Reply with quote  Mark this post and the followings unread

Ever thought of controlling a flanger or a phaser say with a normal LFO up to a certain point in the sweep, and then have a sequencer kick in to make it cough and splutter to the top, and if it has thru zero capability, over the other side and back, when the LFO takes over??
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Peake



Joined: Jun 29, 2007
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PostPosted: Sat Jun 21, 2008 11:01 am    Post subject: Reply with quote  Mark this post and the followings unread

That is superb stuff! I'd love to have one or two in Moog format...
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ryktnk



Joined: Apr 24, 2008
Posts: 196
Location: london
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PostPosted: Sat Jun 21, 2008 11:23 am    Post subject: Reply with quote  Mark this post and the followings unread

Hello

Thanks for the comments.

I am thinking of producing the main pcb.
[see attached photo of prototype]
This has all the logic circuity for the sequencer plus clock
and portamento etc.

The large panel on the with the panel components, will not
be too useful as it is formated for Roland 100m
modules, and contains a few obscure components.

So to make it work you will have to hand wire all the
pots, leds, switches etc.

-ryktnk


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bubblechamber



Joined: Nov 04, 2006
Posts: 276
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PostPosted: Sat Jun 21, 2008 12:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

i'd buy 2 of these
David
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toppobrillo



Joined: Dec 10, 2005
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PostPosted: Sat Jun 21, 2008 3:35 pm    Post subject: Reply with quote  Mark this post and the followings unread

beautiful stuff! who does your panels?
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Blue Hell
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Joined: Apr 03, 2004
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PostPosted: Sat Jun 21, 2008 4:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

topp wrote:
beautiful stuff! who does your panels?


And the pictures? That pic is good as well.

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Danno Gee Ray



Joined: Sep 25, 2005
Posts: 1343
Location: Telford, PA USA

PostPosted: Sat Jun 21, 2008 4:23 pm    Post subject: Reply with quote  Mark this post and the followings unread

How much would a board and a programmed PIC cost?
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Peake



Joined: Jun 29, 2007
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PostPosted: Sat Jun 21, 2008 4:46 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'd certainly want a pair of controller boards and PICs, depending price-wise... Thank you for offering to make them available.
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ryktnk



Joined: Apr 24, 2008
Posts: 196
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PostPosted: Sun Jun 22, 2008 3:25 am    Post subject: Reply with quote  Mark this post and the followings unread

Hello

Quote:
beautiful stuff! who does your panels?


Thanks.
The panels are from Schaeffer:-
http://www.schaeffer-ag.de/en/news/home.html
Not too cheap, but they are good quality, and nice people.

Price for the boards and PICs I will work out, depending on
how many to make, and post back next week hopefully.

Does anybody have strong opinions about the fixing holes ?
At the moment they are M3 sized, positioned fairly arbitrarily
due to position with Roland 100m pot-panel.
Board size is about 105x80mm.
Top two fixing holes are 72mm apart, along long side.
Bottom two fixing holes re 63.5mm apart, along long side.

-ryktnk
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ringer



Joined: Feb 20, 2007
Posts: 49
Location: montreal

PostPosted: Sun Jun 22, 2008 6:54 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi Ryk,

I saw this on the System 100M forum I believe. Thanks for making the project available, great work. I would like 4 sets of boards and pics.

I would recommend you put the mounting holes at the corners and if you have enough space, you could put extra holes at 4 edge centers so it gives extra options just in case someone is space challenged via the flying leads or their front panel layout. Also helpful might be to put mta.100 headers for the wires a la EM Klee. This will be good a source for clocking The Em Klee.

Sorry for asking , but here goes. Any possibility of voltage controlled stage addressing?

Regards,
Ringer
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ENDIF



Joined: Jul 14, 2006
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Location: Reno, NV

PostPosted: Sun Jun 22, 2008 8:16 am    Post subject: Reply with quote  Mark this post and the followings unread

Niiice.
I'm in for at least one if you do a run.

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meic



Joined: Nov 12, 2005
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PostPosted: Sun Jun 22, 2008 8:21 am    Post subject: Reply with quote  Mark this post and the followings unread

I would take one!
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Floppy



Joined: May 09, 2008
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PostPosted: Sun Jun 22, 2008 8:43 am    Post subject: Reply with quote  Mark this post and the followings unread

would it be possible to add note quantize via the software ?
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janvanvolt



Joined: Nov 24, 2005
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Location: Mainz, Germany

PostPosted: Sun Jun 22, 2008 9:50 am    Post subject: Reply with quote  Mark this post and the followings unread

I'll take two boards Smile
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the_viirus



Joined: Jul 05, 2007
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PostPosted: Sun Jun 22, 2008 11:53 am    Post subject: Reply with quote  Mark this post and the followings unread

consider one sold.
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panele



Joined: Apr 13, 2008
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PostPosted: Sun Jun 22, 2008 12:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

i would take one Very Happy
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ryktnk



Joined: Apr 24, 2008
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PostPosted: Sun Jun 22, 2008 1:53 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hello

Regarding the connectors, the 8way for the LEDs and Pots are 2.54mm
spacing so should work with MTA100 or similar kind of connector.
Screw holes, they will probably stay where they are, sorry.

Ringer:-
Quote:
Sorry for asking , but here goes. Any possibility of voltage controlled stage addressing?


About the voltage controlled stage, mmm
That could be possible, but would require sacrificing another feature, which
would probably be the max-stage setting; as there are no more free inputs on the PIC, and adding another socket.
The stage change to a new stage would still be dependent on the clock
pulses and the amount of step repeats on the current stage, but would
jump to an arbitrary stage set by the CV, is this what you mean ?


Floppy:-
Quote:
would it be possible to add note quantize via the software ?


No as the CV's dont go through the PIC, they are just plain analogue.

-ryktnk
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ringer



Joined: Feb 20, 2007
Posts: 49
Location: montreal

PostPosted: Sun Jun 22, 2008 2:33 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote

About the voltage controlled stage, mmm
That could be possible, but would require sacrificing another feature, which
would probably be the max-stage setting; as there are no more free inputs on the PIC, and adding another socket.
The stage change to a new stage would still be dependent on the clock
pulses and the amount of step repeats on the current stage, but would
jump to an arbitrary stage set by the CV, is this what you mean ?


Hi Rick,

Yes basically, you have an input jack that samples the incoming voltage and an ADC converts it to a binary number which sets the counter to the appropriate stage. Once the incoming voltage goes past a voltage threshold, the addressing follows the voltage at the input jack.

Most systems have 0 to 5 volts or 0 to 10 volts ranges, so an option to configure the input for both would be very useful. It is a powerful feature, maybe the random switch could be switched for this feature. You could then use noise to have the random effect or other types of voltages to control the sequencer.

Here is a pdf to explain it better,

http://www.buzzclick-music.com/Milton_owners.pdf

Hopefully, it is possible without sacrificing other features, thanks.

Regards,
Ringer
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Tim Servo



Joined: Jul 16, 2006
Posts: 924
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PostPosted: Sun Jun 22, 2008 2:48 pm    Post subject: New sequencer project Reply with quote  Mark this post and the followings unread

Absolutely awesome, I love it. Personally, I wouldn't change a thing. Okay, maybe add a "random" feature. Since the voltages are still analog, I'm assuming you're using the PIC to generate a binary count for an analog multiplexer (like a 4051). I have to ask, what was your inspiration for the per step features (mute, repeat, etc.)? I've been thinking of doing something similar, and I really like the way you've implemented it here.

Tim (has several random features) Servo
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ryktnk



Joined: Apr 24, 2008
Posts: 196
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PostPosted: Sun Jun 22, 2008 3:38 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hello

Thanks. Tim

I was inspired by watching a Youtube clip of the excellent
YMO in the studio circa 1979, where they demonstrated
the Moog sequencer on their track Rydeen.
Which used the step repeat function.

I went to China last year, and found some pretty obscure
8way switches, so I thought this would be a good use for them.

8 pitch steps can, if used carefully, make
pretty good 4 bar bass lines, by changing the length between
notes, and repeating some notes.

I was too lazy to use a decoder, so the PIC outputs BCD, which
is quite a waste of IO pins, but it keeps the board size small [no decoder chips]
It does have a random step mode, if that's what you mean.

I keep wanting to add more features, but end up with having
to use "soft-selection" for modes, rather than nice big switches, which
is a shame . . .

-ryktnk
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