The 2018 Show Us Your DIY Builds Thread

From circuitbending to homebrew stompboxes & synths, keep the DIY spirit alive!

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jwhtn
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Post by jwhtn » Wed Jan 24, 2018 6:51 pm

DEEMARKAY wrote:

very cool! gotta make sure to save those "wrong" settings then.
reminds me of bubble gum machines in the street, where the acrylic window has been burned a hole into to rob the machine.

How is that labeling done, etched or behing the panel? Can't quite tell from the pictures.
Yeah, I kinda like the back-corner-of-the-shady-arcade aesthetic. Suits my music, I suppose.

The panels are clear acrylic, which I painted on the back side, and then etched through the paint. When it comes out as intended, there's a very pro-looking jeweled kind of effect, where the graphics are recessed and sort of 3D-looking. It's a cool technique, but it clearly needs some refining...
Fuzz pedal feedback coven.
Experiments and tunes and stuff: http://www.youtube.com/c/joelwhitneyjwhtn
http://jwhtn.bandcamp.com

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PWM
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Post by PWM » Thu Jan 25, 2018 1:18 pm

Made a Sync/Trigger input for the QFG. Great module even better! :)

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Post by Jarno » Thu Jan 25, 2018 5:37 pm

First module of the year, and finally have a proper place where I can solder (since we moved almost a year ago).
A ring modulator using Edcox XS1100 transformers I still had from a preamp which did not quite materialise.
The diodes are NOS germanium, I bought a pack of ten which were matched, but not close enough to my liking so I selected a quad which were a bit tighter.
To the best of my knowledge the XS1100 is meant to be driven with a discrete opamp like an API 2520, so I add two output stages (opamp with BD139-BD140 follower pair).
They are normalled to the ringmod, but I can also use them separately for experimenting with slinkys and plate reverbs :D
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The styling was inspired by an analog studio which I frequent, full of old 50-60 measurement equipment (the guy running that studio is an early electronic music expert).
The panel is, let's say, not quite fitting the width of the module :)
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The low-end out of this thing is quite amazing!

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dot matrix madness
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Post by dot matrix madness » Fri Jan 26, 2018 3:49 am

Top line of the panel should read "Analoger Multiplizierer/" (smart-assing...) :hihi:
Must weigh half a ton. :tu:
Licenced to solder since 1993

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Post by Jarno » Fri Jan 26, 2018 4:49 am

:D

Thanks! Next time round I'll ask one of "ze Dzjermans" around here to proofread. :)
But yeah, it does weigh a ton, I wonder if the acrylic will slowly bend, because of creep. Also, one needs to angle it between the two rack rails because it sticks out in all directions, so you need to have about 30HP free to be able to mount it. Regardless, it sounds great. And if anyone here wants one of those tiny boards with the output stage, let me know (headphone amp, plate reverb driver, reverb spring driver, monitor amp, lightbulb driver, relay driver etc etc).

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Moog Prodigy clone

Post by JanneI » Fri Jan 26, 2018 12:05 pm

Hi,

I finally finished my Moog Prodigy clone project and here's some pics. It's based on http://sigmambient.blogspot.fi/2016/05/ ... alive.html and I added Fatar 4-octave keybed and midi implant. Woodwork and panel design is custom. Sounds great and looks awesome! :)

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Image[/img]

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Rex Coil 7
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Post by Rex Coil 7 » Fri Jan 26, 2018 12:53 pm

Holy Crap .... sooper nice work on the Prodigy clone! I'd bet the front panel cost a mint!

Absolutely excellent piece of dreamsmanship brought to life in craftsmanship.

Diggin it! :tu: :bananaguitar:
You mean this place has hot chicks, morning drinking, and free vomit? ... I'm all in!
5U PROJECT - (skip pages 4 through 6, boring junk) ... viewtopic.php?t=78836&highlight=
Never Quit, Die Falling Forward

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wiperactive
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Post by wiperactive » Fri Jan 26, 2018 2:21 pm

Beautiful work!

If Moog had released a late 1984 deluxe limited edition this could have been it.

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Rex Coil 7
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Re: Moog Prodigy clone

Post by Rex Coil 7 » Fri Jan 26, 2018 2:30 pm

JanneI wrote:Hi,

I finally finished my Moog Prodigy clone project ...
Image[/img]
What type of toggle switches are those?

And, is there a FPD "object" (if you will) for the surrounding holes for those toggles?

Those toggles look very similar to the ones Korg uses on various models within their catalog (Volcas, Mono/Mini/Pro-logue, others) and I'd be interested to know what they are and what size Front Panel Designer hole is required.

As I said in my previous post about this project .... bad ass synth, Holmes! It absolutely deserves a name plate ....

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Image

:tu:
You mean this place has hot chicks, morning drinking, and free vomit? ... I'm all in!
5U PROJECT - (skip pages 4 through 6, boring junk) ... viewtopic.php?t=78836&highlight=
Never Quit, Die Falling Forward

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Rex Coil 7
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Post by Rex Coil 7 » Fri Jan 26, 2018 3:25 pm

Jarno wrote:First module of the year, and finally have a proper place where I can solder (since we moved almost a year ago).
A ring modulator using Edcox XS1100 transformers
Safe to say you typo'd "Edcox" but meant to type "Edcor" instead? Nice transformers! I've been wanting to do one using a pair of their WSM series transformers, like what member *CZ Rider used in his ...

LINK to Edcor WSM Series ($11.00 each) - 10k:10k (1:1) = http://www.edcorusa.com/wsm_series

IMAGE = Member *fluxmonkey DIY'd ring mod, these are WSM series Edcor transformers:

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I just used the stock CGS/Modular Addict "passive ring mod" PCB with the regular called for Mouser transformers, but I added sockets for the diodes so as to be able to test out different ones. Aside from using Germanium diodes, I found a preference for using square LEDs as diodes in my own ring mod circuits. I use a toggle switch to A/B between ring mod with Germs, and ring mod with LEDs. I'm happy, but I definitely want to try one with better transformers (better frequency response, the little Mouser ones have a top end of only about 6.5khz or so). Edcor WSM series are advertised to be 20hz to 20khz/ .. the ones you used are advertised to be 10hz to 50khz (!!! DAYUM !!!) however they're also more than twice the money at $25.00 each! I'll have to think about that, I'd need FOUR of those ... $100.00 bucks worth of transformers!

LINK to the Edcor XS1100 ($25.00 each) = http://www.edcorusa.com/xs1100

Here's my double decker (I have two of this entire assembly in my synth, one for each 2 VCO voice x 2 voices):

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Jarno wrote: The panel is, let's say, not quite fitting the width of the module :)
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The low-end out of this thing is quite amazing!
You absolutely win the "Repurposing Old Fuddup Synth Panels as Stooge Plates" award! Nice job in using up your older projects to create an all new one!

:tu:
Last edited by Rex Coil 7 on Mon Jan 29, 2018 4:35 pm, edited 2 times in total.
You mean this place has hot chicks, morning drinking, and free vomit? ... I'm all in!
5U PROJECT - (skip pages 4 through 6, boring junk) ... viewtopic.php?t=78836&highlight=
Never Quit, Die Falling Forward

Jarno
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Post by Jarno » Fri Jan 26, 2018 4:40 pm

Thanks Rex, yes, "Edcor" is what I meant to type :)

I have the WSM transformers as well, but not 10k:10k, I needed something roughly 1:1 so that's why I used the XS1100's (and needed something beefy to drive them).

The bracket I made from a bit of scrap aluminium at work, not a synth (the horror!) :D

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Rex Coil 7
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Post by Rex Coil 7 » Fri Jan 26, 2018 4:54 pm

Jarno wrote:Thanks Rex, yes, "Edcor" is what I meant to type :)

I have the WSM transformers as well, but not 10k:10k, I needed something roughly 1:1 so that's why I used the XS1100's (and needed something beefy to drive them).

The bracket I made from a bit of scrap aluminium at work, not a synth (the horror!) :D
Meh ... you still did a nice job of recycling old stuff! Good on ya!

:tu:
You mean this place has hot chicks, morning drinking, and free vomit? ... I'm all in!
5U PROJECT - (skip pages 4 through 6, boring junk) ... viewtopic.php?t=78836&highlight=
Never Quit, Die Falling Forward

bonzai
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Post by bonzai » Sun Jan 28, 2018 9:05 am

Got two little projects on the weekend:
1. MTM Spring mk2 kit build (photo is obvious, so I leave it out ;) )
2. Shrunk my diy Poti expander from 3 to 2 HP (this time in alu, looks better next to the Batumi) and did some re-org in the case.

Now I got 8 HP left again - not sure yet, how to fill it though... :)

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Re: Moog Prodigy clone

Post by JanneI » Sun Jan 28, 2018 12:02 pm

Rex Coil 7 wrote: What type of toggle switches are those?
13mm width
10mm height
3mm corner radius

that's what I used, pretty good if not perfect. http://www.banzaimusic.com/ has those 3-step switches but I had to purchase those on-on switches from syntaur or some other retro parts shop..

I love how this thing looks, but I got to say it did come with a price tag. Nevertheless, next I'll be doing the same for crowminius, custom case and panels...all for the price of 10 Behringer D's ;-)

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Post by slaughterhousesam » Sun Jan 28, 2018 5:04 pm

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16 stage cgs programmer, stage skip/refuse switch mods, touch keyboard (works *very* nicely), pair of cgs bi directional routers filling out the top row

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Post by emmaker » Sun Jan 28, 2018 7:32 pm

slaughterhousesam wrote: 16 stage cgs programmer, stage skip/refuse switch mods, touch keyboard (works *very* nicely), pair of cgs bi directional routers filling out the top row
I've been thinking about building an implementation of the touch keypbard but really haven't seen anyone comment on how well it works.

slaughterhouseam could you comment in more detail how the touch keyboard works especially the touch/pressure aspects of it?

Thanks
Jay S.

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Post by Rex Coil 7 » Sun Jan 28, 2018 9:15 pm

emmaker wrote: the touch keypbard ....

Thanks
Jay S.
I love how your brain TOTALLY locked up and got stuck between "keyboard" and "keypad". Haahaa!!!

keypbard ..... fekking precious. :lol: :lol:

.... happens to all of us at one time or another ....

:tu:
You mean this place has hot chicks, morning drinking, and free vomit? ... I'm all in!
5U PROJECT - (skip pages 4 through 6, boring junk) ... viewtopic.php?t=78836&highlight=
Never Quit, Die Falling Forward

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emmaker
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Post by emmaker » Sun Jan 28, 2018 11:57 pm

Sometime accidents work for the better.

:hihi: :yay:

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Post by Jarno » Mon Jan 29, 2018 3:22 am

slaughterhousesam wrote:Image

16 stage cgs programmer, stage skip/refuse switch mods, touch keyboard (works *very* nicely), pair of cgs bi directional routers filling out the top row
Let me guess, almost no wiring? :D
Looks great man, pretty epic project.

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Luka
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Post by Luka » Mon Jan 29, 2018 6:09 am

My ttsh and arp seq now having matching cases

I just need to source a dc-dc converter for my sequencer, some fixings, and some a base plate for the seq case.

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Post by Caseyjholmes » Mon Jan 29, 2018 8:45 am

First build of 2018 completed.Image

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Post by slaughterhousesam » Mon Jan 29, 2018 11:23 am

emmaker wrote:
slaughterhousesam wrote: 16 stage cgs programmer, stage skip/refuse switch mods, touch keyboard (works *very* nicely), pair of cgs bi directional routers filling out the top row
I've been thinking about building an implementation of the touch keypbard but really haven't seen anyone comment on how well it works.

slaughterhouseam could you comment in more detail how the touch keyboard works especially the touch/pressure aspects of it?

Thanks
Jay S.
i can only talk about how well it integrates with the cgs programmer, i.e. its individual gate outs just feed the stage select inputs, and only the combined pressure out is used, but given that, its really good - very light touch will activate a stage, brushing the finger along the full length give nice sweeps up and down the stages. the pressure will take some practice to fully gel with, but its very controllable at the moment, albeit with half the voltage range between what id call a very light touch and a normal touch, some actual press needed to get it uptp full, and the strip itself feels really nice. recommended

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Post by slaughterhousesam » Mon Jan 29, 2018 11:25 am

Jarno wrote:
slaughterhousesam wrote:Image

16 stage cgs programmer, stage skip/refuse switch mods, touch keyboard (works *very* nicely), pair of cgs bi directional routers filling out the top row
Let me guess, almost no wiring? :D
Looks great man, pretty epic project.
ugh, wiring. thats been a large chunk of the weekend. programmer boards take a lot of point to point wiring out, but start adding stage switches and the keyboard and its all back again...

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Post by cygmu » Mon Jan 29, 2018 11:31 am

slaughterhousesam wrote: ugh, wiring. thats been a large chunk of the weekend. programmer boards take a lot of point to point wiring out, but start adding stage switches and the keyboard and its all back again...
You work quickly! When I made my sequencer with the touch keyboard I was wiring for weeks, it seemed. I want to add switches for selectable gate on-off but I don't have the heart to open it up again.

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Post by slaughterhousesam » Mon Jan 29, 2018 1:28 pm

cygmu wrote:
slaughterhousesam wrote: ugh, wiring. thats been a large chunk of the weekend. programmer boards take a lot of point to point wiring out, but start adding stage switches and the keyboard and its all back again...
You work quickly! When I made my sequencer with the touch keyboard I was wiring for weeks, it seemed. I want to add switches for selectable gate on-off but I don't have the heart to open it up again.
i was thinking of gate switches as well, but im going to be building a pair of gate sequencers to handle that kind of thing, and already have the klee gate buses which can be pressed into service quite nicely. in the end i settled for dropping in a pair of routers - now i can route a row to muting the clock for envelope gates, or switching between clock divisions for ratchety shenanigans, or all other kinds of gate manipulations. and i was running out of room :)

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