The 2020 Show Us Your DIY Builds Thread!

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

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mome rath
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by mome rath » Sat Jul 25, 2020 2:02 pm

sduck wrote:
Fri Jul 24, 2020 9:49 pm
This one was surprising fast and easy, and really a well designed module and kit also -

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I had a go with one of these recently; will have to build one eventually when I find time
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by Norgatron » Sat Jul 25, 2020 3:42 pm

Datum wrote:
Sat Jul 25, 2020 12:48 pm
Norgatron wrote:
Sat Jul 18, 2020 5:04 pm
This one took a long time.

DIY HexInverter Électronique AteOhAte Toms/Congas with custom panel.
Great job with this! You absolutely crushed the design. I enjoyed reading through the entire process on your blog. Going with the authentic 808 and 909 design really looks terrific. :yay:
Hey, thanks Datum! And I'm glad at least someone read the blog :tu:
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by forrest » Sat Jul 25, 2020 10:14 pm

Thanks to SyndieBot2000XL for the Sin Phi Miasma panel/pcb in a little trade we did, and several hours of backbreaking labour I've finished this thing.. Always wanted a Rampage but prefer knobs to sliders.. The ring mod is a fun addition, think i'm going to get a black panel made up though, can't have 1 blue module in an all white/black/silver case..

Cheers SyndieBot2000XL!

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Re: The 2020 Show Us Your DIY Builds Thread!

Post by memorygardens » Sun Jul 26, 2020 12:17 am

J3RK wrote:
Wed Jul 22, 2020 12:20 am
Starting some new LW modules:

9100D63F-5D01-4E64-AC07-CE2152E8DB88.jpeg
where can I get that clock divider, timbre, and super step!!?!

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Re: The 2020 Show Us Your DIY Builds Thread!

Post by solaranus » Sun Jul 26, 2020 3:01 am

twigathy wrote:
Sat Jul 25, 2020 7:12 am
More newbie things! This time a DC-coupled multiple, with a fancypants bi-colour LED to indicate what's going on. This was a wonderfully stress-free build, the only problem is I'm out of 100R resistors to build the other two PCBs :). More programmer art on the front, I think it makes it nice and clear just what's going on so that's cool.

I just took http://musicfromouterspace.com/analogsy ... dist2.html and added an LED instead of the fourth audio output.

As an aside, I see quite a few 2HP multiple modules that seem to cram an impossible amount of audio jacks into such a tiny (vertical) space. How is that done? Do people use different-to-thonkiconn jacks in these, or do they forgo the ground connection? Or do the PCBs end up being a sandwich of panel - front pcb - rear pcb? Or, is this where surface mount comes in handy?

You can see for example look at the pictures here to figure out how they do it: https://schneidersladen.de/de/2hp-mix

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Re: The 2020 Show Us Your DIY Builds Thread!

Post by J3RK » Sun Jul 26, 2020 12:58 pm

memorygardens wrote:
Sun Jul 26, 2020 12:17 am
J3RK wrote:
Wed Jul 22, 2020 12:20 am
Starting some new LW modules:

9100D63F-5D01-4E64-AC07-CE2152E8DB88.jpeg
where can I get that clock divider, timbre, and super step!!?!
I have nearly completed a whole new series of PCBs, but am still testing and tweaking BOMs for some of them. I’m planning to eventually make them available somehow. My pace is a touch more glacial than it was previously.
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by memorygardens » Sun Jul 26, 2020 9:18 pm

J3RK wrote:
Sun Jul 26, 2020 12:58 pm
memorygardens wrote:
Sun Jul 26, 2020 12:17 am
J3RK wrote:
Wed Jul 22, 2020 12:20 am
Starting some new LW modules:

9100D63F-5D01-4E64-AC07-CE2152E8DB88.jpeg
where can I get that clock divider, timbre, and super step!!?!
I have nearly completed a whole new series of PCBs, but am still testing and tweaking BOMs for some of them. I’m planning to eventually make them available somehow. My pace is a touch more glacial than it was previously.
awesome! trying to build out a all stroh serge system!

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Re: The 2020 Show Us Your DIY Builds Thread!

Post by twigathy » Mon Jul 27, 2020 5:54 pm

solaranus wrote:
Sun Jul 26, 2020 3:01 am
twigathy wrote:
Sat Jul 25, 2020 7:12 am
(...)
As an aside, I see quite a few 2HP multiple modules that seem to cram an impossible amount of audio jacks into such a tiny (vertical) space. How is that done? Do people use different-to-thonkiconn jacks in these, or do they forgo the ground connection? Or do the PCBs end up being a sandwich of panel - front pcb - rear pcb? Or, is this where surface mount comes in handy?

You can see for example look at the pictures here to figure out how they do it: https://schneidersladen.de/de/2hp-mix
Ah, thank you! Seems like that'd make narrow modules (normally) quite deep :)

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Re: The 2020 Show Us Your DIY Builds Thread!

Post by Haralds:Werk » Mon Aug 03, 2020 8:37 am

You can never have enough VCA!
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by wackelpeter » Mon Aug 03, 2020 9:29 am

Question is, are 16 enough? :lol:

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Re: The 2020 Show Us Your DIY Builds Thread!

Post by sduck » Tue Aug 04, 2020 9:20 pm

2 I finished in the last week.
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by Flounderguts » Tue Aug 04, 2020 11:57 pm

My brain wants to line up all those bananuts.
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by Haralds:Werk » Wed Aug 05, 2020 8:42 am

wackelpeter wrote:
Mon Aug 03, 2020 9:29 am
Question is, are 16 enough? :lol:
No. Not when you need 2x4 to move signals around the room (4 channels) one chasing another. Only eight left then.
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by sduck » Wed Aug 05, 2020 11:05 am

Flounderguts wrote:
Tue Aug 04, 2020 11:57 pm
My brain wants to line up all those bananuts.
Bad brain. Very bad, brain. Bad brain! Wait, that's a different thread...
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by Dr. Sketch-n-Etch » Thu Aug 06, 2020 2:22 am

Haralds:Werk wrote:
Wed Aug 05, 2020 8:42 am
wackelpeter wrote:
Mon Aug 03, 2020 9:29 am
Question is, are 16 enough? :lol:
No. Not when you need 2x4 to move signals around the room (4 channels) one chasing another. Only eight left then.
Just get a Planar and drive it with quadrature sine waves in panning mode. That will keep all your VCAs free for other duties.
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by Drillionaire » Sat Aug 08, 2020 3:15 am

I finally finished the last of my DIY backlog and it was a bit of a doozy.
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by jimfowler » Wed Aug 12, 2020 9:16 pm

Yes but what an amazing module. I like mine so much I might just build a second.

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Re: The 2020 Show Us Your DIY Builds Thread!

Post by djs » Thu Aug 13, 2020 1:25 pm

Drillionaire wrote:
Sat Aug 08, 2020 3:15 am
I finally finished the last of my DIY backlog and it was a bit of a doozy.
how hard was it to calibrate?
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by Drillionaire » Thu Aug 13, 2020 1:44 pm

djs wrote:
Thu Aug 13, 2020 1:25 pm
Drillionaire wrote:
Sat Aug 08, 2020 3:15 am
I finally finished the last of my DIY backlog and it was a bit of a doozy.
how hard was it to calibrate?
Took about 30-45 minutes. I used my phone as a function generator to output a sinewave that I could type in the frequency of to match each of the 3 filter frequencies. Dave Brown describes a very thorough way to use a 4-channel oscilloscope to monitor many different aspects of the module during calibration, but I was okay just monitoring the "attenuator all" output with all the attenuators as close to 0dB as I could get them, and just trimming each filter to give the sinewave on the output the highest amplitude possible.

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Re: The 2020 Show Us Your DIY Builds Thread!

Post by nateflanigan » Thu Aug 13, 2020 8:15 pm

Image

If nothing else comes out of quarantine I finally finished these two projects. The single space panel on the left is a break out panel for my micromoog, I wired up all the jacks on the back of the MM to an eight pin aviation jack, the corresponding cable connects to the break out panel. The leads from the MM first go to the toggle switch so the jacks can either connect to the MM or just be stand alone 1/4 to banana converters.

The 4 space panel is just a 5u implementation of the Doepfer matrix mixer from their DIY page, I just really wanted one and nobody makes a 5u matrix mixer.

Mike Burnham made the panels, I can't remember what his username is on here, I gotta find it.

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Re: The 2020 Show Us Your DIY Builds Thread!

Post by seal_cobblr » Fri Aug 14, 2020 4:11 am

J. Haible Krautrock Phaser

Bought the PCB last spring and build it in the following months. Wired it up in a cardboard box to test it. Aaand the the months passed deliberating what type on enclosure, what type of graphics and how to to about etching/printing or whatever.

I landed on the Hammond 1550g (making it the biggest pedal I've ever seen) and a transparent sticker.
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by dot matrix madness » Mon Aug 17, 2020 7:01 am

TR-808 Toms/Congas section and Maracas finally finished.
Even if you've got three almost identical circuits there are enough possibilities
of introducing errors during the build: Soldering in wrong resistors, wrong potis,
wrong connections to transistors, realizing that your 1N60P diodes are actually
silicon ones.
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by twigathy » Fri Aug 21, 2020 4:53 pm

It's time for another newbie-build. This time, it's a 5hp clock divider :)

I took the circuit from here:


...and modified it a little bit, taking out the /1 output and making the whole thing a little wider, mostly for ease of layout and soldering more than anything.

The build went well...initially... but I discovered a huge number of problems:
  • The front panel cutouts for the buttons were just a smidge too small. Fixed with some sandpaper wrapped around a pencil...
  • None of the ground plane connections were present, as I'd messed up copying the upper and lower boards out of the master Kicad drawing. Fixed with a LOT of solid core wires...
  • The LEDs were incredibly bright. Turns out I bought LEDs intended for torches and flashlights rather than indicators, they eat around 10mA...each! Not a huge problem, but the next one I build (I've got two more panel/upper PCB/lower PCB sets left) will be using rather less offensively bright LEDs.
  • All of the divider jack outputs were wired wrong in my schematic with tip and sleeve reversed. Once again, lots of wiring and some trace cutting was required to get everything to work properly
  • I had misread the datasheet for the buttons and unfortunately this caused them to always be "pressed" (Pads 1&2, 3&4 are paired up, I had the switch inputs wired to 1&2). Once again, trace cutting and more wiring changes happened.
Now that it works though, I'm pretty happy with it! Especially after burning quite a few hours on debugging and carefully unbreaking the great many ridiculous problems I caused myself.

It looks great in action. If a little eye-searing. :doh: There's a video of it doing its thing here: https://photos.app.goo.gl/z7XT3DTuaLvwKUrG7

The panel, once installed in a case :)
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Sketchy wiring. This only shows one of the signal jack wires, another 6 got added after.
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Sideways view:
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Re: The 2020 Show Us Your DIY Builds Thread!

Post by Dr. Sketch-n-Etch » Fri Aug 21, 2020 7:29 pm

dot matrix madness wrote:
Mon Aug 17, 2020 7:01 am
TR-808 Toms/Congas section and Maracas finally finished.
Even if you've got three almost identical circuits there are enough possibilities
of introducing errors during the build: Soldering in wrong resistors, wrong potis,
wrong connections to transistors, realizing that your 1N60P diodes are actually
silicon ones.
I love the look of these! They remind me of my own builds, before I started etching boards.

And I too hate installing the wrong potis.
Composting the drones will ensure the survival of the elite.

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Re: The 2020 Show Us Your DIY Builds Thread!

Post by asymptote » Sun Aug 23, 2020 4:05 pm

Built the panels a while ago but finally finished up the enclosure, so it’s time for a beauty shot.
36376F4C-3E9B-4DDB-BF14-341068772D2B.jpeg
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