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emdot_ambient
Joined: Nov 22, 2009
Posts: 667
Location: Frederick, MD
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 Posted: Fri Apr 01, 2011 6:13 am Post subject:
Re: A redesign and new functions for a double-width module |
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| kkissinger wrote: | | This redesign required 1 1/2 module spaces so I added a Yusynth Dual Gated Slew which takes up the other 1/2 module space. |
Looks lovely...but you've got a huge hole of unused panel space! Isn't that kind of like dead air on the radio? 
I was thinking the other day if I ever ended up with unused panel space, I'd probably cut a hole there and build a little niche for votive offerings to the SDIY gods...or maybe enshrine a tiny Ganesh statue therein.
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kkissinger
Joined: Mar 28, 2006
Posts: 1271
Location: Kansas City, Mo USA
Audio files: 31
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| Posted: Fri Apr 01, 2011 9:41 am Post subject:
Re: A redesign and new functions for a double-width module |
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| emdot_ambient wrote: | | you've got a huge hole of unused panel space! Isn't that kind of like dead air on the radio? |
Good point -- could have mounted a knife switch there.
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http://kevinkissinger.com |
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Inventor
Stream Operator
Joined: Oct 13, 2007
Posts: 6192
Location: San Antonio, Tx, USA
Audio files: 267
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Posted: Fri Apr 01, 2011 10:51 am Post subject:
Re: mini Spingboard
Subject description: Spring Equinox build |
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| PHOBoS wrote: | Here's a mini springboard I made last night for todays Spring Equinox,
it has been used in the midichat  |
Awesome concept! mini gear is kewl!
Les
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PHOBoS
Joined: Jan 14, 2010
Posts: 4356
Location: Moon Base
Audio files: 621
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kupfer_m
Joined: Oct 14, 2010
Posts: 48
Location: Belgium
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| Posted: Sat Apr 02, 2011 4:12 am Post subject:
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It's growing !!!
Ken Stone PsychoLFO
Yusynth S&H + Noise
MFOS Dual VCA
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davemoog
Joined: Feb 23, 2008
Posts: 52
Location: Vancouver
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| Posted: Sat Apr 02, 2011 9:19 am Post subject:
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Nice looking panels!
| kupfer_m wrote: | It's growing !!!
Ken Stone PsychoLFO
Yusynth S&H + Noise
MFOS Dual VCA
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emdot_ambient
Joined: Nov 22, 2009
Posts: 667
Location: Frederick, MD
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| Posted: Sat Apr 02, 2011 2:22 pm Post subject:
Re: A redesign and new functions for a double-width module |
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| kkissinger wrote: | | emdot_ambient wrote: | | you've got a huge hole of unused panel space! Isn't that kind of like dead air on the radio? |
Good point -- could have mounted a knife switch there. |
Which turns on the Jacob's Ladder that's set to pulse in time with the module!
http://www.youtube.com/watch?v=GNbvg9jfDr8&feature=related
That would be COOL!
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emdot_ambient
Joined: Nov 22, 2009
Posts: 667
Location: Frederick, MD
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| Posted: Sat Apr 02, 2011 2:27 pm Post subject:
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| kupfer_m wrote: | | It's growing !!! |
Very nice. Some of the best looking modules I've seen in that format. Very clean, classy and functional. 
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kupfer_m
Joined: Oct 14, 2010
Posts: 48
Location: Belgium
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| Posted: Sun Apr 03, 2011 4:30 am Post subject:
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| emdot_ambient wrote: | | kupfer_m wrote: | | It's growing !!! |
Very nice. Some of the best looking modules I've seen in that format. Very clean, classy and functional. |
Thanks! |
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inlifeindeath
Joined: Apr 02, 2010
Posts: 316
Location: Albuquerque, NM
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Posted: Sun Apr 03, 2011 9:21 am Post subject:
Re: Melody Mutilator
Subject description: UM3482A doorbell circuit |
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| PHOBoS wrote: | | Inventor wrote: | | Awesome concept! mini gear is kewl! |
thanks Les
here's something else I recently build; The Melody Mutilator.
Based around a UM3482A melody chip that is meant for doorbells.
It's pretty much the basic example circuit from the datasheet but I
made a lot of things controllable, added a feedback control (from
output to CLK oscillator) and a CV input for the speed, which can
also be controlled with an LDR, that's what the extra box is for.
It can produce droney sounds, noise and things in between. 
some more photos can be found here |
Phobos! You always make the coolest shit! Very inspiring. I'm still trying to wrap my head around how to build one of those predictive synths . Is your spring thing hooked up to contact mics? what's it do? |
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Tim Servo
Joined: Jul 16, 2006
Posts: 924
Location: Silicon Valley
Audio files: 11
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Posted: Sun Apr 03, 2011 11:18 am Post subject:
2011 Build Pictures
Subject description: Melody Mutilator |
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"here's something else I recently build; The Melody Mutilator.
Based around a UM3482A melody chip that is meant for doorbells."
Okay, you can't show us something like that and not give us some sound samples!
Tim (all ears) Servo |
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Tim Servo
Joined: Jul 16, 2006
Posts: 924
Location: Silicon Valley
Audio files: 11
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| Posted: Sun Apr 03, 2011 11:19 am Post subject:
2011 Build Pictures |
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@Kupfer: VERY nicely done! What are the modules on the first row?
Tim (I am curious fellow) Servo |
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TekniK
Joined: Aug 10, 2008
Posts: 1059
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Posted: Sun Apr 03, 2011 11:29 am Post subject:
Re: Melody Mutilator
Subject description: UM3482A doorbell circuit |
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| PHOBoS wrote: |
here's something else I recently build; The Melody Mutilator.
Based around a UM3482A melody chip that is meant for doorbells.
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Lovely little box,colorfull, i like it! |
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PHOBoS
Joined: Jan 14, 2010
Posts: 4356
Location: Moon Base
Audio files: 621
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Posted: Mon Apr 04, 2011 8:19 am Post subject:
Re: Melody Mutilator
Subject description: UM3482A doorbell circuit |
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| inlifeindeath wrote: | | Phobos! You always make the coolest shit! Very inspiring. I'm still trying to wrap my head around how to build one of those predictive synths . Is your spring thing hooked up to contact mics? what's it do? |
Thanks! 
And yes the spring board has a contact mic, which is nothing more than a 35mm piezo disc. Wait, I make picture for you (will end up at the bottom as an attachment). I came across some of my notes on the predictive synth, so I might be able to draw up a schematic (If I can find some time in between building other things)
| Tim Servo wrote: | Okay, you can't show us something like that and not give us some sound samples!
Tim (all ears) Servo |
Ok, I recorded something for you, first demo starts with the envelope controls, than I add the pitch controls and at about 7.00 minutes I start using the feedback control (that's where the real fun begins).
The 2nd demo uses a sequencer for the CV control (too bad I can't use the feedback together with it)
| TekniK wrote: | | Lovely little box,colorfull, i like it! |
Thank you, I finally have some colored knobs now 
| Description: |
| Inside look of the mini springboard |
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| Description: |
| Demonstration of The Melody Mutilator |
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PHOBoS - Melody Mutilator Demo 1 (Apr 04, 2011).mp3 |
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| Description: |
| Demonstration of the Melody Mutilator - CV Control |
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Download |
| Filename: |
PHOBoS - Melody Mutilator Demo 2 (Apr 04, 2011).mp3 |
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inlifeindeath
Joined: Apr 02, 2010
Posts: 316
Location: Albuquerque, NM
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Posted: Mon Apr 04, 2011 9:17 am Post subject:
Re: Melody Mutilator
Subject description: UM3482A doorbell circuit |
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| PHOBoS wrote: | | I came across some of my notes on the predictive synth, so I might be able to draw up a schematic (If I can find some time in between building other things) |
That's be awesome! Thanks! |
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glitched
Joined: Mar 25, 2006
Posts: 80
Location: phila., pa USA
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| Posted: Fri Apr 15, 2011 12:39 pm Post subject:
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Here's my DIY mini-blog that describes my current projects: http://synth.pen.io/
I have recently finished a dual-4069 oscillator, Wasp CMOS filter (by Fonik!) Electric Druid VCLFO and VCADSR, and plan to start my SSM2164-based quad (or dual) VCA, soon.
I'm quite proud of my progress; just a few years ago, I was relegated to building pre-made kits, but I'm now able to take schematics and translate them to a circuit board without much trouble!
Anyway, there are lots of pictures up there, but nothing has a panel, yet. I'll post pictures here when it all comes together.
Special thanks to Fonik, Eric Archer, Tim Servo, and David Dixon, among others, for their help in getting some of this done. |
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jordroid
Joined: Jan 17, 2010
Posts: 193
Location: ithaca, new york
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| Posted: Fri Apr 15, 2011 2:26 pm Post subject:
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Here is a tremolo/panner + mutron bi-phase clone i built for a friend a little bit ago, back for a footswitch and a chance to take pictures.
The trem/panner is based on the MFOS circuit, but with an OTA sine shaper set up to distort a triangle into an almost square, but with sloping edges and rounded corners, we experimented a lot and felt the happiest about the way the panning sounded with that wave.
I borrowed a real bi-phase to compare the phaser to and the clone sounds awfully good. If it was for me i would add an "initial" knob, switches for number of phase and feedback stages, a more "modular" approach to the LFOs and a switch for inverted or normal feedback, but he wanted it set up just like the original. The bi-phase schematic is from Marc Bareilles site.
(i'm not sure what the piece of tape is for)
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kkissinger
Joined: Mar 28, 2006
Posts: 1271
Location: Kansas City, Mo USA
Audio files: 31
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| Posted: Fri Apr 22, 2011 10:14 pm Post subject:
New Yusynth LFOs in a Dual configuration |
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The Yusynth LFO has so many on-board features that Yves proposes two configurations. Both feature voltage-controlled FM and four (sawtooth, triangle, sine, pulse) outputs. Option one adds a rotary switch that selects one of the output waveforms and routes it to an inverter. Option two adds a panel-mounted Pulse Width control and a sync input.
Since all these are useful functions, I decided to design a configuration that allows all of the features. I discovered that there was not room for both a Pulse Width pot and the Rotary switch.
My solution was to build option two and to add a hex inverter board, route all the waveforms through inverters, and bring them out to output jacks. Thus, each LFO has eight outputs. In other words, there was room for additional output jacks but not room for another knob.
I look forward to putting this module to use!
| Description: |
| The front panel. A redo (strip and relable) is on my do-list now -- I managed to scuff it a bit. A DIYr's work is never done! |
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| The PCB with the two LFO circuits. |
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| Description: |
| The Hex Inverter PCB (designed with Eagle) |
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http://kevinkissinger.com |
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JoeMorris
Joined: Apr 26, 2009
Posts: 161
Location: Brighton
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| Posted: Mon Apr 25, 2011 6:31 am Post subject:
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Mini semi-modular (normalised routings so you can switch on and play without cables) that I like to call the monolith...
Right to left, top to bottom (I have given modules my own names as I always do - its fun)
Top:
JH Living VCOs (LOVE these) - 'Wavespitters'
Oakley Multimix - 'Blender'
MFOS S&H/Noise - 'Crusher'
Oakley Discontinuity - 'Stamper'
Oakley MidiDAC - 'Ambassador'
Bottom:
Oakley envelope follower - 'Waverider'
JH Variable Slope 36db LP filter - 'Abyssal Plane'
Ian Fritz Threeler multimode filter - 'Continental Slope'
(again I LOVE both these filters. Pretty much best I've heard. And together...)
Oakley Multimix - 'Blender'
2x MFOS ADSR - 'Sculptor'
MFOS dual VCA - 'Gatekeepers'
(Going to add a 2U panel at the bottom with a couple of MFOS VC LFOs - only got the LFOs built into the JH modules to play with at the mo... plus probably the stripboard sin/tri + sub waveshaper and some Silent Way patchpoints.)
My first modular, and sounding BIGGER than I could have ever imagined. Already fiending for more envelopes and VCAs though! MKII? |
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PHOBoS
Joined: Jan 14, 2010
Posts: 4356
Location: Moon Base
Audio files: 621
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| Posted: Mon Apr 25, 2011 6:52 am Post subject:
my first modular |
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If we're posting first modulars I can join in
I just turned an old writing desk (don't know if there's a better name for
this kind of thing) into a modular synth cabinet. The left space has a 6U
width and can hold two rows of 3U and 1 row of 4U panels. The right space
has a 12U width and two rows for 5U panels.
Also made the first panel which is for the power supply. I'll take a close up
once I've finished the PSU.
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adambee7
Joined: Apr 04, 2009
Posts: 420
Location: united kingdom
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| Posted: Mon Apr 25, 2011 7:03 am Post subject:
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| those mounting rails you re using, are they for M3 screws? |
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PHOBoS
Joined: Jan 14, 2010
Posts: 4356
Location: Moon Base
Audio files: 621
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emdot_ambient
Joined: Nov 22, 2009
Posts: 667
Location: Frederick, MD
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| Posted: Mon Apr 25, 2011 9:36 am Post subject:
Re: New Yusynth LFOs in a Dual configuration |
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| kkissinger wrote: | | The Yusynth LFO has so many on-board features that Yves proposes two configurations...Since all these are useful functions, I decided to design a configuration that allows all of the features. |
Excellent. I've looked at that one and thought the same thing.
But I haven't gone crazy and started etching my own PCBs yet, and this one's not available commercially. 
I think I'd add the PWM jacks and reduce the outputs to one per waveform...then use a DP4T switch to select the Inverted/Non-inverted output, like this:
POS LFO1 LFO2
1 + +
2 - +
3 + -
4 - -
Not as flexible as a + and - output for each waveform, but more panel friendly. I'm not sure how many times I'd want both the + and - from one LFO at the same time, though I suppose there would be times...hmm....
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kkissinger
Joined: Mar 28, 2006
Posts: 1271
Location: Kansas City, Mo USA
Audio files: 31
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| Posted: Mon Apr 25, 2011 10:51 am Post subject:
Re: New Yusynth LFOs in a Dual configuration |
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| emdot_ambient wrote: | | I think I'd add the PWM jacks... |
Note that the module doesn't have an out-of-the-box PWM voltage input and that it pads the input to U2c down to (approximately) -6.5 to +6.5v (I haven't measured the value so I'm making a guestimate here).
You could substitue a Jack for the pot however you'd need to pad the voltage so as not to exceed the maximums.
I'd probably just grab a TL072 and build an inverting summer followed by an inverter -- thus, I'd be able to mix the voltages from the pot and a jack while adjusting the feedback resistor(s) for an appropriate gain.
Of course, there would be the temptation to add an attenuator pot for the PWM input voltage and then there would be a ton of knobs!
I actually pondered this a decided that such an application (to use a voltage-controlled duty-cycle) is so rare that I'd just use one of my VCO's in the sub-audio range to do this.
| emdot_ambient wrote: | | I haven't gone crazy and started etching my own PCBs yet, and this one's not available commercially. |
LOL -- I etch my own because I find it easier than to wire up components on pegboard! You sound like a future-PCB-etcher. And, hey -- you are doing sDIY -- the crazy train has already left the station!
| emdot_ambient wrote: | | I'm not sure how many times I'd want both the + and - from one LFO at the same time, though I suppose there would be times...hmm.... |
One thing I'm interested in is to route the pulse output and the inverted output to two VCO's. As I vary the Pulse Width, I should get an effect where the top (and bottom) pitches bounce between the VCOs. Will be handy for VCA cross-fading (using slews) and switching.
Sometimes I add modules/features with very specific applications in mind, other times I add stuff when I have the panel space. Sometimes, the things that I "just add for the heck of it" turn out to be very useful.
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http://kevinkissinger.com |
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emdot_ambient
Joined: Nov 22, 2009
Posts: 667
Location: Frederick, MD
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| Posted: Mon Apr 25, 2011 3:28 pm Post subject:
Re: New Yusynth LFOs in a Dual configuration |
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| kkissinger wrote: | | ...You sound like a future-PCB-etcher. And, hey -- you are doing sDIY -- the crazy train has already left the station! |
**shakes fist** Curse you!...but you may be right. That'll have to wait, though, I've got such a huge lot of work to do on my current DIY. Following a pretty definite plan with the goal of getting up and running for live shows.
| kkissinger wrote: | ... | emdot_ambient wrote: | | I'm not sure how many times I'd want both the + and - from one LFO at the same time, though I suppose there would be times...hmm.... |
One thing I'm interested in is to route the pulse output and the inverted output to two VCO's. As I vary the Pulse Width, I should get an effect where the top (and bottom) pitches bounce between the VCOs. Will be handy for VCA cross-fading (using slews) and switching. |
Yeah, the more I thought about it the more I could see it being desireable and often used. Of course if you've got inverters elsewhere in your system (or better yet, a couple attenuverter mixers) you can use them. Double the jacks is a pretty heavy panel space price to pay for a double LFO module...still, sweet module!
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