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blue hell
Site Admin
Joined: Apr 03, 2004
Posts: 24499
Location: The Netherlands, Enschede
Audio files: 298
G2 patch files: 320
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 Posted: Fri Jun 24, 2011 5:14 pm Post subject:
Re: Push.Pull Spectrum
Subject description: PLL Pedal |
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| coloring pad wrote: | | ... hope you like it! |
Oh, I like how it looks! Will need to listen later though.
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Jan
also .. could someone please turn down the thermostat a bit.
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tjookum
Joined: May 25, 2010
Posts: 360
Location: Netherlands
Audio files: 26
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| Posted: Sat Jun 25, 2011 3:21 am Post subject:
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coloring pad, that thing looks just perfect. I really like how the sound fits the design and I know from experience that stripping a PCB and mounting it like that can be a lot of work.
The actual function of the machine isn't really clear to me though and I can't make it out in the video, do you have a schematic?
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There he goes. One of God's own prototypes. A high-powered mutant of some kind never even considered for mass production. Too weird to live, and too rare to die.
Hunter S. Thompson
movies
noise |
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coloring pad
Joined: Nov 13, 2009
Posts: 17
Location: newer jersey
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| Posted: Sat Jun 25, 2011 6:31 am Post subject:
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| tjookum wrote: | coloring pad, that thing looks just perfect. I really like how the sound fits the design and I know from experience that stripping a PCB and mounting it like that can be a lot of work.
The actual function of the machine isn't really clear to me though and I can't make it out in the video, do you have a schematic? |
Thank you!
I did this on perfboard. It barely fits, and there are about 60 wires coming out of it to the knobs & joysticks & such. No official schematic, but basically, the signal path goes:
Preamp>PLL (with six oscillators that intertwine in the circuitry)>Octave divider>Filter
Basically, it recognizes the audio and turns it into a telephone type synthesized signal, sputters and pulses because of the oscillators and various voltage starves/capacitor values, gets divided to a lower octave to add thickness, and then gets filtered through the photoresistors that are lined up with the three LEDs that are in the light.
I have no idea how to make a PCB (yet) and have little understanding of formal electronics.
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Strazdas
Joined: Apr 21, 2010
Posts: 42
Location: Kaunas, Lithuania
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| Posted: Sun Jun 26, 2011 1:25 pm Post subject:
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This is Polivoks VCF.
Schematic from http://m.bareille.free.fr/modular1/vcf_polivoks/vcf_polivoks.htm but with original russian op-amps (these are golden ones, really!!! and I'm still hold few of them, many went for gold recycling a time ago) and transistor which is not critical but they are very cheap nowadays (10 times as wester replacement) and I have bunch of them from old times. Green capacitors also russian 1uF and very large!  It's very easy to build.
Added trimpot for "Frequency" adjust.
The filter sounds really good and dirty when Q knob turned half way and wild when turned on fully.
I didn't decide yet what knobs to use, so it stays as it is for now.
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bf
Joined: Feb 28, 2009
Posts: 22
Location: mid-west
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| Posted: Mon Jun 27, 2011 8:49 pm Post subject:
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First of a series of CGS panels of zthee's design.
Thank you again zthee for your inspiring designs, and you help along the way. |
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diablojoy
Joined: Sep 07, 2008
Posts: 809
Location: melbourne australia
Audio files: 11
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| Posted: Tue Jun 28, 2011 2:52 pm Post subject:
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very nice  incredibly neat and compact build bf |
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delayed
Joined: Jun 24, 2008
Posts: 130
Location: TN
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| Posted: Tue Jun 28, 2011 7:01 pm Post subject:
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A+ work on the keyboard!
And I second the fine wiring for the compact box.
Great jobs. |
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ericcoleridge
Joined: Jan 16, 2007
Posts: 889
Location: NYC
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| Posted: Tue Jun 28, 2011 7:32 pm Post subject:
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| bf wrote: | First of a series of CGS panels of zthee's design.
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How do you go about making the "cradle"? Looks like a frame, made from L-brackets, yes? Where does one find this size L-bracket?
Beautiful job, very well don. |
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kkissinger
Stream Operator
Joined: Mar 28, 2006
Posts: 1452
Location: Kansas City, Mo USA
Audio files: 45
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| Posted: Wed Jun 29, 2011 1:33 pm Post subject:
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| ericcoleridge wrote: | Looks like a frame, made from L-brackets, yes? Where does one find this size L-bracket?
Beautiful job, very well don. |
Indeed, it is a wonderful job.
The aluminum L brackets are pretty standard -- I purchase them at Lowe's.
For the PCBs, he is using nylon spacers and attached them with wire ties. The panel is really neat and the whole project is very compact, indeed!
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-- Kevin
http://kevinkissinger.com |
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The Peasant
Joined: Nov 13, 2009
Posts: 114
Location: Sunny Alberta
Audio files: 1
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| Posted: Wed Jun 29, 2011 1:40 pm Post subject:
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| bf wrote: | First of a series of CGS panels of zthee's design.
Thank you again zthee for your inspiring designs, and you help along the way. |
Beautiful job!
Take care,
Doug
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The Electronic Peasant
www.electronicpeasant.com |
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bf
Joined: Feb 28, 2009
Posts: 22
Location: mid-west
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| Posted: Wed Jun 29, 2011 7:21 pm Post subject:
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| ericcoleridge wrote: | How do you go about making the "cradle"? Looks like a frame, made from L-brackets, yes? Where does one find this size L-bracket?
Beautiful job, very well don. |
Thank you for all of the compliments. If anything this project has only motivated me to build more.
Yes, I just used two pieces of aluminum angle I picked up from Lowe's, drilled at the spacing of the PCB's holes and secured them with zip ties, save for the distro board which has tapped holes to allow me to adjust its height. Without the PCBs attached, the "cradle" rails are not mechanical attached to each other save through the standoffs screwed to the panel. I have seen frames or cradles where the two ends are attached via cross-members, but everything felt secure enough without being overly rigid done this way.
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adambee7
Joined: Apr 04, 2009
Posts: 420
Location: united kingdom
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| Posted: Mon Jul 04, 2011 1:31 pm Post subject:
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awesome BF  |
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Dan Lavin
Joined: Nov 09, 2006
Posts: 649
Location: Spring Lake, Mi, USA
Audio files: 21
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| Posted: Wed Jul 06, 2011 6:16 pm Post subject:
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Just finished my rack-mount version of the deMIDulator, 8 bit digital synth and lo-fi sampler. You can read about it here:
http://derekenos.com/dIndex.html
I hardwired the audio line in to a 1/4" mono jack on the front panel. Right now, I have a mellotron string sample in the sample waveform location. I probably won't change samples too often.
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Synth DIY since 1977! |
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coloring pad
Joined: Nov 13, 2009
Posts: 17
Location: newer jersey
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| Posted: Wed Jul 06, 2011 6:24 pm Post subject:
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| Strazdas wrote: | This is Polivoks VCF.
Schematic from http://m.bareille.free.fr/modular1/vcf_polivoks/vcf_polivoks.htm but with original russian op-amps (these are golden ones, really!!! and I'm still hold few of them, many went for gold recycling a time ago) and transistor which is not critical but they are very cheap nowadays (10 times as wester replacement) and I have bunch of them from old times. Green capacitors also russian 1uF and very large! It's very easy to build.
Added trimpot for "Frequency" adjust.
The filter sounds really good and dirty when Q knob turned half way and wild when turned on fully.
I didn't decide yet what knobs to use, so it stays as it is for now. |
I believe I heard this filter before online and spent a lot of time looking for it... if i remember correctly it sounds amazing. I wanted to build a pedal with this filter but I am not well versed in schematics and obscure Soviet parts despite what my work looks or sound like: more of a breadboard person. How much do I have to bribe you to talk to me about this filter and how to make it with my limited knowledge, or talk you into producing a few of these? PM me or email me... sound samples soon? I think this is what I've been looking for.
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ericcoleridge
Joined: Jan 16, 2007
Posts: 889
Location: NYC
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| Posted: Thu Jul 07, 2011 2:13 pm Post subject:
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recent builds
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inlifeindeath
Joined: Apr 02, 2010
Posts: 316
Location: Albuquerque, NM
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AnalogCustom
Joined: Jun 23, 2009
Posts: 52
Location: Chile
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| Posted: Fri Jul 08, 2011 12:40 pm Post subject:
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Simple Keyboard Controller and KB Controller panel.
Marco. |
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ericcoleridge
Joined: Jan 16, 2007
Posts: 889
Location: NYC
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| Posted: Sat Jul 09, 2011 12:22 pm Post subject:
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| AnalogCustom wrote: | Simple Keyboard Controller and KB Controller panel.
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Marco, where did u get the keyboard itself? It looks great. |
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AnalogCustom
Joined: Jun 23, 2009
Posts: 52
Location: Chile
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| Posted: Sat Jul 09, 2011 1:47 pm Post subject:
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| ericcoleridge wrote: | | AnalogCustom wrote: | Simple Keyboard Controller and KB Controller panel.
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Marco, where did u get the keyboard itself? It looks great. |
Hello
I do not understand the question. The keyboard was of a Korg Polysix, did not work. That was your question?
Regards
Marco. |
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LFLab
Joined: Dec 17, 2009
Posts: 497
Location: Rosmalen, Netherlands
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| Posted: Sun Jul 10, 2011 2:14 pm Post subject:
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I think he was referring to the touch keyboard in the Buchla-esque case, interested in this myself too!
Nice work on your controller as well, Marco. |
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Celtic Peasant
Joined: Dec 29, 2009
Posts: 44
Location: Alberta
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| Posted: Sun Jul 10, 2011 10:46 pm Post subject:
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| ericcoleridge wrote: | | recent builds |
Eric that is a thing of beauty!! Awesome job! 
Take care,
Zoie
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Celtic Peasant
Joined: Dec 29, 2009
Posts: 44
Location: Alberta
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| Posted: Sun Jul 10, 2011 10:48 pm Post subject:
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| AnalogCustom wrote: | | Simple Keyboard Controller and KB Controller panel. Marco. |
What a beautiful keyboard Marco. Beautiful work.
Take care,
Zoie
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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LFLab
Joined: Dec 17, 2009
Posts: 497
Location: Rosmalen, Netherlands
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| Posted: Tue Jul 12, 2011 12:14 pm Post subject:
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| Gruendlich und Klar, Matthias, not boring! They look great, I really should get my *ss in gear and finish stuff as well! |
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shawn
Joined: Dec 13, 2005
Posts: 209
Location: savannah
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| Posted: Tue Jul 12, 2011 1:09 pm Post subject:
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| ericcoleridge wrote: | | AnalogCustom wrote: | Simple Keyboard Controller and KB Controller panel.
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Marco, where did u get the keyboard itself? It looks great. |
Your folding case looks great and I forgot to pm you my touch keyboard info! I'll do that tonight! |
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