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 Forum index » DIY Hardware and Software
2017 Build Photos!
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RingMad



Joined: Jan 15, 2011
Posts: 308
Location: Montreal, Canada
Audio files: 3

PostPosted: Fri Jan 06, 2017 4:56 am    Post subject: 2017 Build Photos!
Subject description: Show us what you have been building
Reply with quote  Mark this post and the followings unread

I was hoping to finish this during the holidaze, but didn't end up having time due to visiting relatives.

CLK-OSC: clock oscillator module for a collective synth at the Eastern Bloc soundLab​ in Montreal... Some basic square wave oscillators: 2 with inverted outs as well, 1 normal, and one with mark & space control (i.e. adjustable duty cycle), all with 2 frequency ranges.

The LEDs are sanded flush with the wooden panel. It's a bit of a mess on the back... it was my first panel rather than a box, and probably it would have been better to mount the panel perpendicular. Oh, well.

.:James:.

Edit: replaced verso photo with updated circuit.


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CLK-OSC module panel (front)
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CLK_OSC module - verso4-800.jpg
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CLK-OSC module (back)
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CLK_OSC module - verso4-800.jpg



Last edited by RingMad on Sun Jan 08, 2017 8:11 am; edited 1 time in total
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PHOBoS



Joined: Jan 14, 2010
Posts: 3121
Location: Moon Base
Audio files: 506

PostPosted: Fri Jan 06, 2017 8:06 am    Post subject: Reply with quote  Mark this post and the followings unread

You are off to a great start james Very Happy
Does the dute cycle control work by using diodes to create seperate controls for rise/fall times ?

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RingMad



Joined: Jan 15, 2011
Posts: 308
Location: Montreal, Canada
Audio files: 3

PostPosted: Fri Jan 06, 2017 8:22 am    Post subject: Reply with quote  Mark this post and the followings unread

PHOBoS wrote:
Does the duty cycle control work by using diodes to create separate controls for rise/fall times ?

Yes, exactly. And in this case I used LEDs for the diodes, which will blink in some cases. When I tried using LEDs with a higher forward voltage, it didn't work. Probably using 1N4148's is best, and driving separate indicator LEDs somehow, but I went with a basic circuit I've used before.

.:James:.
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PHOBoS



Joined: Jan 14, 2010
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PostPosted: Fri Jan 06, 2017 8:54 am    Post subject: Reply with quote  Mark this post and the followings unread

ah so that's why I wasn't able to spot any diodes on the PCB. Makes sense about the forward voltage, it will probably depend a bit on the supply
voltage but if it is too large the voltage over the capacitor will never get high enough to go beyond the treshold level of the schmitt trigger inverters.

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AlanP



Joined: Mar 11, 2014
Posts: 349
Location: New Zealand
Audio files: 20

PostPosted: Fri Jan 06, 2017 11:15 am    Post subject: Reply with quote  Mark this post and the followings unread

http://electro-music.com/forum/topic-65656.html

^^ 2016 Smile
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J3RK



Joined: Jun 05, 2006
Posts: 123
Location: Seattle

PostPosted: Fri Jan 06, 2017 11:55 am    Post subject: Reply with quote  Mark this post and the followings unread

More of a 2016 project really, but I finished in 2017. Very Happy


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wackelpeter



Joined: May 05, 2013
Posts: 326
Location: germany
Audio files: 9

PostPosted: Fri Jan 06, 2017 2:31 pm    Post subject: Reply with quote  Mark this post and the followings unread

Wow... Looks really nice and lovely... cheers thumleft

Feel a bit reminded of old Serge modules... Can i ask what modules it contain?

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haebbmaster



Joined: Aug 27, 2016
Posts: 6
Location: Windenreute, Germany

PostPosted: Fri Jan 06, 2017 3:54 pm    Post subject: Reply with quote  Mark this post and the followings unread

Lunetta style synth

Schemactics by Castle Rocktronics
http://castlerocktronics.com/modular.html


lfo.jpg
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4 * LFO, 40106
R2R
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VCO, LFO, R2R
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4 * VCO, 40106
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vco.jpg



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Case
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PHOBoS



Joined: Jan 14, 2010
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PostPosted: Fri Jan 06, 2017 4:24 pm    Post subject: Reply with quote  Mark this post and the followings unread

nice synth and a nice photo J3RK, would love to see a bit more of it. Love the arcade buttons Razz
I still have a couple of those laying around here which I should use someday, hmm actually I might
have an idea. Thanks for reminding me.

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Broadwave



Joined: Feb 16, 2007
Posts: 344
Location: Manchester UK
Audio files: 6

PostPosted: Sat Jan 07, 2017 12:33 am    Post subject: Reply with quote  Mark this post and the followings unread

I've finally finished it - Sparta Synthesizer, based on the ARP Odyssey with an extra VCO (Mono/3 VCO Paraphonic), Patch Points and Aftertouch/Modulation routing. I cheated a bit by using a CME Xkey 37 - I couldn't face all those J-Wires again. Wink

I think I'm done with DIY now - I have no more room left and I need to reclaim my sanity.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

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Kronos 2-88, Kronos 61, Studiologic Sledge V2/SL, Broadwave ARP 2600EX, Broadwave 18U ARP based Eurorack Modular, Broadwave Minimoog Clone, GEM S2 Turbo.

Synth DIY Projects

Musical Doodlings

Last edited by Broadwave on Thu Feb 09, 2017 11:56 pm; edited 1 time in total
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RingMad



Joined: Jan 15, 2011
Posts: 308
Location: Montreal, Canada
Audio files: 3

PostPosted: Sun Jan 08, 2017 8:20 am    Post subject: Reply with quote  Mark this post and the followings unread

PHOBoS wrote:
ah so that's why I wasn't able to spot any diodes on the PCB. Makes sense about the forward voltage, it will probably depend a bit on the supply
voltage but if it is too large the voltage over the capacitor will never get high enough to go beyond the treshold level of the schmitt trigger inverters.

Re mark & space / duty cycle control: Since I still had it on the breadboard, I tried using 1N4148's for the diodes and simple transistor drivers for the LEDs, and it works much better. The output wave is cleaner (before, using LEDs, it wouldn't go all the way back down to 0V). With the drivers, the LEDs are good and bright. I had a little bit of space left on the perfboard, so I made the changes... I updated the photo above, so you might spot the diodes now Smile.

.:James:.
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J3RK



Joined: Jun 05, 2006
Posts: 123
Location: Seattle

PostPosted: Mon Jan 09, 2017 10:58 am    Post subject: Reply with quote  Mark this post and the followings unread

wackelpeter wrote:
Wow... Looks really nice and lovely... cheers thumleft

Feel a bit reminded of old Serge modules... Can i ask what modules it contain?


Here's a list.

Panel 1
FlexWave Complex Dual VCO
Dual VCA (my version of the Mike Sims style pre-distortion VCA)
Dynamix (this contains two resonant LPGs, two linear slope generators, stereo output mixer, analog OR mixer to mix slopes)

Panel 2
DXOR (Schottky diode XOR circuit with logic and audio outputs plus a voltage controlled integrator)
DivisiClock (VC clock with /2 /3 and /4 divisions)
Bit Station (shift register based pseudo random CV, digital noise, white noise module)
MicroState Filter (state variable filter with two variable FM inputs, "Ping" input, etc.)
CV Processor/Offset Generator
Audio Mixer

Panel 3
UltraFlop 08 (sequencer with up, down, and pingpong counting, individual gate outputs, a combined gate output (post switches)
Two manual gate and manual DC voltage sections.

Thanks for the kind words!
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J3RK



Joined: Jun 05, 2006
Posts: 123
Location: Seattle

PostPosted: Mon Jan 09, 2017 10:59 am    Post subject: Reply with quote  Mark this post and the followings unread

PHOBoS wrote:
nice synth and a nice photo J3RK, would love to see a bit more of it. Love the arcade buttons Razz
I still have a couple of those laying around here which I should use someday, hmm actually I might
have an idea. Thanks for reminding me.


I love arcade buttons. I actually occasionally build arcade controllers for MAME use, so I have these around sometimes.

I'll post a couple more pics as soon as I get a chance.


Thanks!!

Also, there are audio demos up here: http://soundcloud.com/drj3rk/sets/stroh-modular-silver-synth
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Cfish



Joined: Feb 24, 2016
Posts: 449
Location: Indiana

PostPosted: Mon Jan 09, 2017 3:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hay Broadwave. That turned out great. Watched it throughout your progress.awesome project.
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Grumble



Joined: Nov 23, 2015
Posts: 456
Location: Netherlands
Audio files: 18

PostPosted: Mon Jan 09, 2017 3:51 pm    Post subject: Reply with quote  Mark this post and the followings unread

Broadwave wrote:
I think I'm done with DIY now - I have no more room left and I need to reclaim my sanity

Thats the pitfall of building a modular synth: it is never finished!

Very nice build! thumb up
But as the British say: The proof of the pudding is the eating, so... we want sounds too much coffee
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PHOBoS



Joined: Jan 14, 2010
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Location: Moon Base
Audio files: 506

PostPosted: Wed Jan 11, 2017 5:52 pm    Post subject: Reply with quote  Mark this post and the followings unread

haebbmaster: nice looking case Very Happy are you going to fill it up completely or leave the bottom part for patch cables ?

Broadwave: stellar job on that synth Razz I am amazed at how fast it came together. And I agree with Grumble; we want sounds!

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haebbmaster



Joined: Aug 27, 2016
Posts: 6
Location: Windenreute, Germany

PostPosted: Sat Jan 14, 2017 3:20 am    Post subject: Reply with quote  Mark this post and the followings unread

PHOBoS wrote:
haebbmaster: nice looking case Very Happy are you going to fill it up completely or leave the bottom part for patch cables ?

Thank you. This will be for cables. But I got two cases of the same type. So maybe only one of them will have space for cables.
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Skysurfer



Joined: Sep 16, 2014
Posts: 16
Location: Florida

PostPosted: Mon Jan 16, 2017 5:40 am    Post subject: Reply with quote  Mark this post and the followings unread

Yusynth VCA and Env Gen, Thomas Henry XR2206 VCO, not prettied up the panel is still being finalized.


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Cfish



Joined: Feb 24, 2016
Posts: 449
Location: Indiana

PostPosted: Mon Jan 16, 2017 7:32 am    Post subject: Reply with quote  Mark this post and the followings unread

Very nice sky surfer.

They look to be 5u, however pictures sometimes deceive.

I like how you mounted your boards.
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Skysurfer



Joined: Sep 16, 2014
Posts: 16
Location: Florida

PostPosted: Mon Jan 16, 2017 9:48 am    Post subject: Reply with quote  Mark this post and the followings unread

Cfish wrote:
Very nice sky surfer.

They look to be 5u, however pictures sometimes deceive.

I like how you mounted your boards.


The older I get the more I appreciate 5U, big knobs and everything out in the open. Ideally there will be normaling of signals coming and going on D connectors with a basic patch hardwired.
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PHOBoS



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PostPosted: Mon Jan 23, 2017 2:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

My first finished build for 2017: an ARP 4072 VCF module for my euro-rack synth.
more info here


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fonik



Joined: Jun 07, 2006
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PostPosted: Wed Feb 01, 2017 1:34 am    Post subject: Reply with quote  Mark this post and the followings unread

okay, made from a PCB/panel kit, nonetheless, i designed the additional circuitry and the PCB.

Posted Image, might have been reduced in size. Click Image to view fullscreen.
DualHaibleWaspVCF by Matthias Herrmann, on Flickr

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fonik



Joined: Jun 07, 2006
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PostPosted: Wed Feb 01, 2017 1:37 am    Post subject: Reply with quote  Mark this post and the followings unread

PHOBoS wrote:
My first finished build for 2017: an ARP 4072 VCF module for my euro-rack synth.

I have not been around for quite a while. Nice to see you are still so productive!

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PHOBoS



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PostPosted: Wed Feb 01, 2017 3:49 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks matthias, you are one of my electronic heroes !

Nice looking filter although it could use a couple of yellow knobs Bug squash

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fonik



Joined: Jun 07, 2006
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PostPosted: Wed Feb 01, 2017 5:32 am    Post subject: Reply with quote  Mark this post and the followings unread

PHOBoS wrote:
Thanks matthias, you are one of my electronic heroes !

Ridiculous. Laughing

Quote:
Nice looking filter although it could use a couple of yellow knobs Bug squash

well, even though it was built in 11/2016 i will post this, since it meets your requirements:

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