The 2021 Show Us Your DIY Builds Thread!

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Kelaifu
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by Kelaifu » Sat Feb 13, 2021 9:21 pm

Octave b wrote:
Wed Jan 06, 2021 5:16 pm
Here are my latest Lego stuff...
I almost went full duplo when i started out, was trying to do something 'original' but in the end I failed to resist the convince of euro.

Made a duplo teensy midi controller for a friend though, so it wasnt a totally wasted effort!

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hox3d
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by hox3d » Sun Feb 14, 2021 3:18 am

Picard wrote:
Sat Feb 13, 2021 6:07 pm
BA662DIY.jpg
My build of a BA662 clone based on the remarkable work of user @guest documented here.
A tiny pcb embedded in transparent epoxy resin. To be used in my 303 clone.
Wow, it looks so great ! Did you document the whole process (i.e especially with epoxy "casing" like that etc)?

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joeSeggiola
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by joeSeggiola » Sun Feb 14, 2021 5:37 am

twigathy wrote:
Sat Feb 13, 2021 1:11 pm
Yep, this is just FR-4. I used the standard 1.6mm thickness, HASL (ROHS) process for the panel and ENIG for the control board. It does give a little if you really try to bend it, but with the jacks down at the bottom this isn't really a problem.
Cool, thanks for the reply. In fact, I just realized what makes my quote so pricey is the 2mm thickness process. I guess I'll try order some 1.6mm too and see how it goes.

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squarewavesurfer
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by squarewavesurfer » Mon Feb 15, 2021 9:55 pm

Hacked together a 10 channel passive voltage divider, specifically for converting 10V CV to 5V.
Attachments
_20210215_225358.JPG
_20210215_225300.JPG
WTB: Verbos Scan & Pan; Sputnik modules (EF/Preamp, 6 channel mixer, 5 step voltage source); Mutable Instruments Factory panels

Kelaifu
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by Kelaifu » Thu Feb 18, 2021 9:49 am

Hopefully these images work, a couple of through hole boards I had spare that I soldered up using SMT where possible, just for the practice.

Image

Image

waldenpotato
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by waldenpotato » Sun Feb 21, 2021 8:18 pm

I just finished the Oakley Sound Systems Dual VCO.

IMG_3890.jpg
IMG_3889.jpg
IMG_3888.jpg

formica
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by formica » Tue Feb 23, 2021 1:29 am

Hey,

I just made this simple passive mult.
20210223_052616.jpg
20210223_052554.jpg
I designed the panel in OnShape CAD, and cut it on a CO2 laser cutter in walnut hardwood. Not sure if that is going to hold it's more brittle than I anticipated - I think I now know why most panels are aluminum :)

I used this schematic; https://aisynthesis.com/ai001-multiple-build-guide/

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Re: The 2021 Show Us Your DIY Builds Thread!

Post by DEEMARKAY » Tue Feb 23, 2021 4:05 am

twigathy wrote:
Fri Feb 12, 2021 7:27 pm
Another tool missing from my modular was a slew limiter, so armed with the D107 schematic (http://www.dintree.com/#D107), I went ahead and made up a PCB and panel. I diverged from the schematics a bit to add in (buffered) red-green bi-colour LEDs for both the input and output which actually worked really well - visual feedback on what's happening to a signal is something I like to have :).
I also built that slew limiter but found that the range of the knobs are really tight, meaning they completely cut out the signal already around 9 o‘clock. I played around with capacitor values. I understand that the low-pass filter at the core of the module just has a certain frequency response and corresponding roll-off. I wasn‘t really able to find a ratio that is useful across a variety of voltages though.

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dot matrix madness
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by dot matrix madness » Tue Feb 23, 2021 4:45 am

formica wrote:
Tue Feb 23, 2021 1:29 am
Hey,
I just made this simple passive mult.
I designed the panel in OnShape CAD, and cut it on a CO2 laser cutter in walnut hardwood. Not sure if that is going to hold it's more brittle than I anticipated - I think I now know why most panels are aluminum :)
hardwood is still stiffer than cardboard of the same thickness. ;)
Licenced to solder since 1993

twigathy
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by twigathy » Tue Feb 23, 2021 7:54 am

DEEMARKAY wrote:
Tue Feb 23, 2021 4:05 am
twigathy wrote:
Fri Feb 12, 2021 7:27 pm
Another tool missing from my modular was a slew limiter, so armed with the D107 schematic (http://www.dintree.com/#D107), I went ahead and made up a PCB and panel. I diverged from the schematics a bit to add in (buffered) red-green bi-colour LEDs for both the input and output which actually worked really well - visual feedback on what's happening to a signal is something I like to have :).
I also built that slew limiter but found that the range of the knobs are really tight, meaning they completely cut out the signal already around 9 o‘clock. I played around with capacitor values. I understand that the low-pass filter at the core of the module just has a certain frequency response and corresponding roll-off. I wasn‘t really able to find a ratio that is useful across a variety of voltages though.
Ah weird. I have to admit I've only really played about with it in the first maybe third of the pot range. Perhaps a log potentiometer instead of a linear would help get more usable range out of it?

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forestcaver
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by forestcaver » Tue Feb 23, 2021 12:51 pm

ssi2130 8hp module (also done an expansion module to support the vc-mixing on the ssi2130).
Attachments
002-modular_ajh_tzfm.jpg
001-modular_ajh_tzfm.jpg

ericneilj
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by ericneilj » Tue Feb 23, 2021 4:58 pm

forestcaver wrote:
Tue Feb 23, 2021 12:51 pm
ssi2130 8hp module (also done an expansion module to support the vc-mixing on the ssi2130).
Looks great!

Are you hand soldering the QFN?

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forestcaver
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by forestcaver » Tue Feb 23, 2021 5:05 pm

ericneilj wrote:
Tue Feb 23, 2021 4:58 pm
forestcaver wrote:
Tue Feb 23, 2021 12:51 pm
ssi2130 8hp module (also done an expansion module to support the vc-mixing on the ssi2130).
Looks great!

Are you hand soldering the QFN?
Thanks!

Yes - hand-soldering it... (well, lightly tinned the pads with an iron and solder wire, then hot air, then reflow the outer pads with an iron). It’s pretty easy to do tbh.

OIP
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by OIP » Tue Feb 23, 2021 6:58 pm

formica wrote:
Tue Feb 23, 2021 1:29 am
I designed the panel in OnShape CAD, and cut it on a CO2 laser cutter in walnut hardwood. Not sure if that is going to hold it's more brittle than I anticipated - I think I now know why most panels are aluminum :)
hell yeah, i made a lot of panels out of laser cut plywood (got lucky with a job having a fab lab on site) and it holds up surprisingly well over time. hardwood looks great.

would recommend putting the grain longways, it makes a significant difference to strength.

formica
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by formica » Wed Feb 24, 2021 3:15 am

OIP wrote:
Tue Feb 23, 2021 6:58 pm
formica wrote:
Tue Feb 23, 2021 1:29 am
I designed the panel in OnShape CAD, and cut it on a CO2 laser cutter in walnut hardwood. Not sure if that is going to hold it's more brittle than I anticipated - I think I now know why most panels are aluminum :)
hell yeah, i made a lot of panels out of laser cut plywood (got lucky with a job having a fab lab on site) and it holds up surprisingly well over time. hardwood looks great.

would recommend putting the grain longways, it makes a significant difference to strength.
Thanks a lot for the the tip on grain direction. I see that it is very important with small panels with holes in them :)

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Bodo1967
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by Bodo1967 » Thu Feb 25, 2021 3:40 am

01IMGP3726.jpg
A desktop drum synth consisting of the "Um-Tss" which was presented in this forum a while ago (4 years or so, actually), 3 SynTom II and 2 SynBal boards. All outputs are internally routed to a simple stereo mixer (modified version of an old MFOS design) which allows stereo panning. The thing runs on a 9 V wall wart. Each of the 8 instruments (the Um-Tss includes three) can be triggered individually. I used 8 instrument voices in total since that exactly suits the drum sequencer included in the Beatstep Pro.

Re: different and missing knobs - concerning pots I used what I had lying aroung, so there are to different shaft types => different knobs. And I ran out of Davies style (1900h, iirc) knobs so I am currently waiting for a shipment to arrive.
... why buy it for $100 when you can build it yourself for $150?

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Luka
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by Luka » Tue Mar 02, 2021 3:25 am

Bodo1967 wrote:
Thu Feb 25, 2021 3:40 am
01IMGP3726.jpg

A desktop drum synth consisting of the "Um-Tss" which was presented in this forum a while ago (4 years or so, actually), 3 SynTom II and 2 SynBal boards. All outputs are internally routed to a simple stereo mixer (modified version of an old MFOS design) which allows stereo panning. The thing runs on a 9 V wall wart. Each of the 8 instruments (the Um-Tss includes three) can be triggered individually. I used 8 instrument voices in total since that exactly suits the drum sequencer included in the Beatstep Pro.

Re: different and missing knobs - concerning pots I used what I had lying aroung, so there are to different shaft types => different knobs. And I ran out of Davies style (1900h, iirc) knobs so I am currently waiting for a shipment to arrive.

Looks great!

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Luka
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by Luka » Tue Mar 02, 2021 3:28 am

Finished my Jurgen Haible Vocoder a few months ago
494D155C-4F15-4319-A876-A8B11636010C.jpeg

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soup
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by soup » Tue Mar 02, 2021 9:00 am

Wow! :love: :love: :love:

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Kampfzwerg
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Re: The 2021 Show Us Your DIY Builds Thread!

Post by Kampfzwerg » Tue Mar 02, 2021 1:22 pm

MYSEM front
MYSEM front
MYSEM back
MYSEM back
Hey folks, it's been a while and I still need to fix some flaws but I was super excited about how
the screenprinted panel looks on the first of eight SEMs Im about to build.

Have a nice day
WOMEN AND CATS WILL DO AS THEY PLEASE,
AND MEN AND DOGS SHOULD RELAX AND GET USED TO THE IDEA.

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