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diablojoy
Joined: Sep 07, 2008
Posts: 809
Location: melbourne australia
Audio files: 11
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 Posted: Fri Sep 16, 2011 1:36 am Post subject:
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| Quote: | | But you could use a clock divider to trigger the 4-step sequential switch, set it to divide by 8, then the switch would only change every 8 steps and the seqeuncers would be triggered: Seq1, steps 1-8; Seq2, steps 1-8; Seq3, steps 1-8; Seq4, steps 1-8. |
It will increase the complexity a little at least
but it gives me food for thought so i will think about it, maybe a divide by n may bring enough results to be worth doing it
its just a quick thought but with a VC divider some interesting pattern variations would emerge over time , not random but could be fairly
odd
I was also planning on adding one of boogdish's simple quantizers to each sequencers output . I think they were made for each other 
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emdot_ambient
Joined: Nov 22, 2009
Posts: 667
Location: Frederick, MD
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| Posted: Fri Sep 16, 2011 8:48 am Post subject:
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| diablojoy wrote: | | I was also planning on adding one of boogdish's simple quantizers to each sequencers output . I think they were made for each other |
That's a great idea! I've got 4 of those (the first issue of that PCB) set aside already for 4 other sequencers in the works, plus between 2 and 4 of the 2nd issue (can't remember how many I got of those), one of which is going in a S&H/Dual LFO/VC Ring Mod panel I just got.
They would indeed be absolutely right for this, and take up virtually no room (1 pot or rotary switch...and no jacks if you configure them for use in the sequencer and not for external devices).
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Fri Sep 16, 2011 1:13 pm Post subject:
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| emdot_ambient wrote: | | But you could use a clock divider to trigger the 4-step sequential switch, set it to divide by 8, then the switch would only change every 8 steps and the seqeuncers would be triggered: Seq1, steps 1-8; Seq2, steps 1-8; Seq3, steps 1-8; Seq4, steps 1-8. |
i LOVE modular synths! nothing is carved in stone, just re-patch! i think i will build 4 independend seqs and use my seqswitches and dividers for clock distribution... 
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diablojoy
Joined: Sep 07, 2008
Posts: 809
Location: melbourne australia
Audio files: 11
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| Posted: Sat Sep 17, 2011 1:58 am Post subject:
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add in one cgs09 VC divider this is getting very 
| Quote: | | i LOVE modular synths! nothing is carved in stone, just re-patch! i think i will build 4 independend seqs and use my seqswitches and dividers for clock distribution... |
A very good point and probably the smarter way to go however i always wanted a big 64 step seq so i will go with a dedicated module this time on one really large panel, the nice thing is even with that i will be able to use each one individually as well so i dont really lose much by doing it that way.
cheers
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camelneck
Joined: Sep 27, 2008
Posts: 68
Location: KY (USA)
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| Posted: Sun Sep 18, 2011 9:14 am Post subject:
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| fonik wrote: | | the main reason i would like to have a couple of PCB sets are the on-board potentiometers... |
I have to agree! The biggest drawback to building a DIY sequencer, whether its the Baby 10 or the more impressive MFOS 10- and 16-step sequencers, is the huge amount of panel wiring that is involved. For most of us, that also means we'll have one hell of a rats nest, too. 
This project certainly overcomes that obstacle and is worth looking into. My modular synthesizer is based upon the MOTM/Synthesizer.com format and the knob spacing (and size) is considerably greater than that provided by this design. My biggest concern is how well this panel will integrate with my other panels in terms of both physical appearance and performance. However, I'm certainly enticed by the amount of panel space I would save if I were to build several of these. |
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camelneck
Joined: Sep 27, 2008
Posts: 68
Location: KY (USA)
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| Posted: Sun Sep 18, 2011 9:59 am Post subject:
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Actually, I have been in the process of designing a CD4017-based sequencer with 8 to 10 steps, 16 - 20 pots and 2 CV busses
This sequencer is very similar to Fonik's version of the Baby-10 sequencer and it is based-upon Fonik's Sequential Switch PCB which I bought a couple of years ago. In addition to being a 4-step sequential switch, this PCB can also be used as a 4-step sequencer as long as you have 4 Pots that are capable of delivering 4 preset voltages (such as a panel of Passive Attenuators or Fonik's Attenuverter Mixer). It has a reset input, a PB reset switch, a PB manual-step switch, a clock input, and a step-selector switch. The best news is that it can easily be modified into an 8-step or even a 10-step sequencer by simply modifying the wiring.
As for the panel wiring, I was planning to use 2 to 4 strip boards which cost about $1 each. Of course, there would still be some wiring (I plan to use ribbon cable) that would connect the strip boards to the Sequential Switch PCB. The pots, as well as any diodes and resistors that aren't mounted on the sequential switch PCB, would mount on the strip boards instead of being wired to the pots (via panel wiring).
I wonder if anybody who has built the Baby-10 sequencer has tried using strip boards to minimize or eliminate panel wiring? If so, I'd like to hear your comments. Using strip boards might not save a lot of time (especially for the person who makes the initial design), but it would certainly simplify wiring and minimize future repair time. |
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Sun Sep 18, 2011 12:53 pm Post subject:
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| camelneck wrote: | | I wonder if anybody who has built the Baby-10 sequencer has tried using strip boards to minimize or eliminate panel wiring? |
we are going OT here, i think. anyways, i just mounted diodes and resistors directly to the front pael components, thus reducing the actual wiring
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camelneck
Joined: Sep 27, 2008
Posts: 68
Location: KY (USA)
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| Posted: Mon Sep 19, 2011 6:52 am Post subject:
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| fonik wrote: | | camelneck wrote: | | I wonder if anybody who has built the Baby-10 sequencer has tried using strip boards to minimize or eliminate panel wiring? |
we are going OT here, i think. anyways, i just mounted diodes and resistors directly to the front pael components, thus reducing the actual wiring |
Fonik makes an excellent point. However, I failed to mention that there was another reason why I was considering using strip boards.
I recently bought 150 B100K 16mm Alpha pots from a friend for $60 USD. Unfortunately, they are PCB-mount pots. Since I currently don't have any solder lug pots, I was planning to use them when I build my sequencer.
If I only have to solder one wire per pin, I have no problem soldering the wires to the PCB-mount Alpha pots. (I then cover the connection with heat shrink to offer support and protection). However, for several different reasons, I'm not comfortable soldering more than 1 wire, resistor lead, or diode lead, to a single pin on a PCB-mount pot.
I then realized that I could overcome this obstacle if I used a "pot chicklet" with each pot. I then got the idea that I could make some pot chicklets rather quickly and inexpensively by cutting a strip board into little squares. I was also going to explore some other options, such as connecting 3 or 4 pots together using a single piece of a strip board.
However, once I finally take the time to figure out everything that actually needs to be done, I might decide that it is best to buy some solder lug pots and do it like Fonik suggests. So I guess I made this post a little bit prematurely. |
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citric acid
Joined: Jun 11, 2011
Posts: 45
Location: germany
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| Posted: Tue Sep 20, 2011 10:29 am Post subject:
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hi,
you can count me in with 1 PCB Set w/ minimal components.
if it´s goes cheaper i will think about a second. but i have to look a bit of my cash at the moment.
thanks,
cit
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HexInverter
Joined: Aug 21, 2010
Posts: 338
Location: Canada
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| Posted: Thu Sep 22, 2011 1:42 pm Post subject:
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Finally, the switches have arrived! Now I can update the layout to their measurements and make Prototype #2! Then it will be determined whether or not we can get rid of the panel hardware in favour of switch nuts holding the PCB to the panel.
Hopefully I will make some good progress this weekend in that matter! |
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HexInverter
Joined: Aug 21, 2010
Posts: 338
Location: Canada
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| Posted: Sun Sep 25, 2011 10:52 am Post subject:
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Minor update -- some careful examination of the switches has led me to the conclusion that they are definitely not capable of supporting the entire mechanical stress of the module, thus, we will be sticking with panel hardware, unfortunately. Hopefully I can reduce the number of screws from 8 to 4 with some testing
I am swamped with school work so will not be finishing the prototype this weekend. Hopefully next week! |
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HexInverter
Joined: Aug 21, 2010
Posts: 338
Location: Canada
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HexInverter
Joined: Aug 21, 2010
Posts: 338
Location: Canada
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| Posted: Fri Oct 07, 2011 4:29 pm Post subject:
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Over $2,000 now! 17 days left
Well folks, I'm posting this here as well in case anyone wants to give it a shot:
Getlofi has completely ignored the large write up I sent them about this project, but I think it really belongs there. This is the perfect project for someone experimenting with electronics with limited experience.
I am sure they are rejecting it because they have a sequencer board of their own that they sell, but that is just silly. I suppose they have never heard of cross-promotion. They are nothing alike, and if anything sympleSEQ would draw more users to the community in general! If anyone else wishes to try and make that happen by using their submission form, maybe we can make them come to reason!
It stands that if anyone has any other ideas, feel free to try! I've done all I can think of... |
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HexInverter
Joined: Aug 21, 2010
Posts: 338
Location: Canada
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| Posted: Mon Oct 10, 2011 4:14 pm Post subject:
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Almost there! ~$600 left!
Well, I have some great news! The second (and final) prototype was finally finished today, and appears to be working exactly as intended!
This means that I will be finalizing the silk-screen layers and adjusting a few minor imperfections, and very soon, sending the order to the board house for manufacturing. Since they will likely be the thing that takes longest, if I can get them ordered a bit early, then everyone's kits and PCBs might be ready to ship earlier!
After assessing some laminate PCB material's strength, I have decided to go with 6 screws holding the unit into the panel on the front. So, that's a reduction of two for anyone that's been paying attention. You may choose to leave the middle two out at your own risk if you'd like, but I don't recommend it. They will come with all kits as was stated previous.
I will try to get a video made as soon as I have the time to do so! Here is an image for now
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diablojoy
Joined: Sep 07, 2008
Posts: 809
Location: melbourne australia
Audio files: 11
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| Posted: Mon Oct 10, 2011 5:06 pm Post subject:
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| Quote: | | Almost there! ~$600 left! |
cool good news all round then
have almost finished the lay out a daughter board for a 64 step
version really struggling to get it down to 3.8" x 2.5" for the pcbexpress
proto service i intend to use.
and also my first attempt at a four layer board, oh well we shall see 
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emdot_ambient
Joined: Nov 22, 2009
Posts: 667
Location: Frederick, MD
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Paradigm X
Joined: Feb 15, 2011
Posts: 363
Location: Null and void
Audio files: 2
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| Posted: Thu Oct 13, 2011 3:35 am Post subject:
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Err... still cant decide between 2 or 4... only really need 2 (or one even!, not even got one VCO yet!), at the moment, but they look great and im sure ill want more later... got some things ending on ebay on sunday so see how much i make
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Fri Oct 14, 2011 4:50 am Post subject:
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thee number is 4, not 3, not 5, and certainly not 2! 4 is the number!
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matthias
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rosch
Joined: Oct 03, 2009
Posts: 164
Location: germany
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| Posted: Fri Oct 14, 2011 5:09 am Post subject:
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hex,
are you planning to provide the basic kits (ie pcbs, pots switches) for some period of time, or is especially the kits thing going to be a one time opportunity?
the thing is i won't be able to take as many as i want right now, but i'd prefer having the same pots & switches for all of them.....
hmmm, better spend some thoughts on making some dough.. |
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HexInverter
Joined: Aug 21, 2010
Posts: 338
Location: Canada
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| Posted: Fri Oct 14, 2011 5:33 am Post subject:
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| fonik wrote: | | thee number is 4, not 3, not 5, and certainly not 2! 4 is the number! |
Haha, I should hire you for my sales team!  |
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HexInverter
Joined: Aug 21, 2010
Posts: 338
Location: Canada
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| Posted: Fri Oct 14, 2011 5:38 am Post subject:
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| rosch wrote: | hex,
are you planning to provide the basic kits (ie pcbs, pots switches) for some period of time, or is especially the kits thing going to be a one time opportunity?
the thing is i won't be able to take as many as i want right now, but i'd prefer having the same pots & switches for all of them.....
hmmm, better spend some thoughts on making some dough.. |
Well, basically, the most important part is the PCBs.
I would like to provide those for a long time, but basically, $2,800 is a lot of money, and it's ALL going towards getting as many as I can. I can't extend myself any further than that though, so when they sell out, they're gone 
As it stands, I have budgeted the entire $2,800 towards as many kits as possible, (these seem to be the most popular), just as many minimal kits (PCBs w/ switches, hardware and pots).
The remainder (and now any extra funding that comes in) is going to go towards more PCBs.
The PCBs are the most expensive part, and thus the hardest to buy in small quantities in the future. So, I should have a nice chunk of PCBs on reserve that I can get another small order of switches and pots for (or just sell on their own) once the minimal/kits sell out. Unfortunately, I would no longer be getting the quantity discount on the switches/pots, so the price might go up by a few dollars per set. That remains to be seen... |
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Paradigm X
Joined: Feb 15, 2011
Posts: 363
Location: Null and void
Audio files: 2
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| Posted: Fri Oct 14, 2011 6:25 am Post subject:
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| fonik wrote: | | thee number is 4, not 3, not 5, and certainly not 2! 4 is the number! |
Ok, well once youve paypalled me some cash Ill definitely buy four! 
I shall see, few days left, have to see how (badly) my finances are doing then.
Cheers
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marvkaye
Joined: Mar 14, 2011
Posts: 225
Location: Fla
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| Posted: Fri Oct 14, 2011 1:01 pm Post subject:
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I just jumped in for 4 of the basic PCB w/ hardware kits... if I saw what I think I saw that should put you over the [$2800] top. Good news, I suspect. Thanks for doing this, it's a very cool project.
<marv> |
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diablojoy
Joined: Sep 07, 2008
Posts: 809
Location: melbourne australia
Audio files: 11
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| Posted: Fri Oct 14, 2011 10:25 pm Post subject:
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| Quote: | | thee number is 4, not 3, not 5, and certainly not 2! 4 is the number! |
holy handgrenade batman 
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Sat Oct 15, 2011 12:06 pm Post subject:
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you got it, and i re-translated it from the german version! (in germany foreign language movies get synchronized by german actors)
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matthias
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