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 Forum index » DIY Hardware and Software
2011 Build Pictures
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MadScientist



Joined: Nov 28, 2011
Posts: 63
Location: Denmark

PostPosted: Thu Dec 08, 2011 9:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

Remember that wood is an very good thermal insulator. With your amazing cabinet, the heat generated inside can only be conducted away through the front panels, and that is assuming you won't be covering those with wood as well. Very Happy

Adding to this is that your panels are tilted back, making it even more difficult to cool the inside through them.

For that reason putting the PSU inside the case may be asking for trouble, depending on how it is designed (linear, switched mode) and how much power you expect the completed synth to draw.
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diablojoy



Joined: Sep 07, 2008
Posts: 809
Location: melbourne australia
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PostPosted: Fri Dec 09, 2011 2:12 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Adding to this is that your panels are tilted back, making it even more difficult to cool the inside through them.

For that reason putting the PSU inside the case may be asking for trouble, depending on how it is designed (linear, switched mode) and how much power you expect the completed synth to draw.




heat is a good point. I will have to take some measurements once the cab is full though and then see if i need to add vents or not

My thanks to scrog productions for the idea for the power scheme
which i am still working on . It is a 18v-0-18v 300VA centre tapped torroidal feeding 8 x lm317/337 regulator boards [ only one is shown in pics ] via 2 x 35 amp bridge rectifiers and 4 x 18000uf caps
I expect to draw no more than 200-300mA max through each regulator so they should run pretty cool
I have also added a delay board to bring each reg board on line
one after another to limit the initial start up current.

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bubzy



Joined: Oct 27, 2010
Posts: 594
Location: United Kingdom
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PostPosted: Sat Dec 10, 2011 5:43 am    Post subject: Reply with quote  Mark this post and the followings unread

"several" nights work. i didnt count so i dont really know Very Happy

Fonik x4046 vco pcb & waveshaper
buchla 218 portamento
yusynth adsr
thomas henry 21c vca (fonik pcb layout)
cgs steiner vcf
thomas henry 21c s&h
some lfo i found here on forum cant remember

thats it. has banana connectors for power on bottom left of panel.


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MadScientist



Joined: Nov 28, 2011
Posts: 63
Location: Denmark

PostPosted: Sat Dec 10, 2011 6:24 am    Post subject: Reply with quote  Mark this post and the followings unread

diablojoy wrote:
[...] It is a 18v-0-18v 300VA centre tapped torroidal feeding 8 x lm317/337 regulator boards [ only one is shown in pics ] via 2 x 35 amp bridge rectifiers and 4 x 18000uf caps
I expect to draw no more than 200-300mA max through each regulator so they should run pretty cool.[...]

If you wish, then I wouldn't mind giving your PSU configuration the full, custom mad scientist analysis, assuming you haven't done so already. I believe this would be worthwhile in this case, given how much effort you have spent on the project.

If so, then please measure the copper resistances of the toroidal transformer, primary and total (across 36V) secondary. The secondary resistance in particular is likely to be quite low, so a rough value will be quite adequate.

Also, I assume you are using 2x 18'000 uF for smoothing each unregulated supply rail, 4 in total?
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fonik



Joined: Jun 07, 2006
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PostPosted: Sat Dec 10, 2011 10:50 am    Post subject: Reply with quote  Mark this post and the followings unread

bubzy wrote:
thats it.

audio? i wanted to hear something...

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PostPosted: Sat Dec 10, 2011 10:59 am    Post subject: Reply with quote  Mark this post and the followings unread

That's a nice little box! Smile

Yes... Sound?! Very Happy

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diablojoy



Joined: Sep 07, 2008
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PostPosted: Sat Dec 10, 2011 7:54 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Also, I assume you are using 2x 18'000 uF for smoothing each unregulated supply rail, 4 in total?

yes,
just after the rectifiers.
will try to take some measurements when i get home

Quote:
audio? i wanted to hear something...

yes please so do I
nice mix of modules bubzy

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Cynosure
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Joined: Dec 11, 2010
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PostPosted: Sun Dec 11, 2011 1:06 pm    Post subject: C-MOnSter
Subject description: CMOS Based Polyphonic Synthesizer
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Well, I just barely made it into the 2011 build thread. I started this project a year ago as my first DIY synth project and had to learn everything along the way.

I made a keyboard controlled top octave synth that uses almost exclusively simple CMOS circuits to create the sound. The full explanation is here:

http://www.jacobwatters.com/c-monster.php

And here is the sound demo:



Thanks to everyone here on this site for helping to answer my questions and guiding me through the entire process.


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fonik



Joined: Jun 07, 2006
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PostPosted: Sun Dec 11, 2011 1:51 pm    Post subject: Reply with quote  Mark this post and the followings unread

so you finally accomplished it? great! will have to wait until tomorrow to watch the vid, though. i am realy looking forward to it!
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umschmitt



Joined: Jun 29, 2011
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PostPosted: Sun Dec 11, 2011 2:59 pm    Post subject: Reply with quote  Mark this post and the followings unread

Wow ! Beautiful & brutal synth ! With lots of radical options it seems ! Nice use of a LED display, too.
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EdisonRex
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PostPosted: Sun Dec 11, 2011 3:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

Good demo, Jacob. You've done awesomely. Very Happy
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inlifeindeath



Joined: Apr 02, 2010
Posts: 316
Location: Albuquerque, NM

PostPosted: Sun Dec 11, 2011 3:52 pm    Post subject: Reply with quote  Mark this post and the followings unread

sounds great! glad you got it done as well!
i like the 'things i learned' section on your site as well haha

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wmonk



Joined: Sep 15, 2008
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Location: Enschede, the Netherlands
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PostPosted: Sun Dec 11, 2011 4:40 pm    Post subject: Reply with quote  Mark this post and the followings unread

Wow Jacob, that is really awesome! and sounding real funky afro
Heh, and the video looks a lot more CMOS compared to your professional vids Laughing

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PHOBoS



Joined: Jan 14, 2010
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PostPosted: Mon Dec 12, 2011 4:13 am    Post subject: Re: C-MOnSter
Subject description: CMOS Based Polyphonic Synthesizer
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Cynosure wrote:
Well, I just barely made it into the 2011 build thread.
blabla,.. showing of awesome synth

thumright well-done thumleft

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kkissinger



Joined: Mar 28, 2006
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PostPosted: Mon Dec 12, 2011 1:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

Cool equipment from Bubzy and Cynosure.

The CMOnSter's sound is bigger than life!

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kkissinger



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PostPosted: Mon Dec 12, 2011 1:20 pm    Post subject: a new track with my modular synth Reply with quote  Mark this post and the followings unread

btw -- in case you didn't notice, I just posted a track from my DIY modular:

http://electro-music.com/forum/topic-51049.html

In particular, it showcases the some of the Yusynth filters: (the VCS filter clone, the Steiner filter clone, and the Fixed Filter bank). I also used the fonitronic Voltage-controlled Ring Modulator, and some CGS modules (Super Psycho Modulation Source, Wave shaper, Modulo magic), too.

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Cynosure
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PostPosted: Mon Dec 12, 2011 6:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for all the kind words. I'm glad you guys like the sounds it makes. I'm very proud of my little monster synth. Very Happy
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umschmitt



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PostPosted: Tue Dec 13, 2011 3:36 pm    Post subject: Reply with quote  Mark this post and the followings unread

(This is technically a build from last year, but I feared doing something evil by reviving the 2010 thread.)

Ladies and gentlemen, meet
the Atari Punk Chewbacca !
It consists of a collision of John Hollis' Crash Sync and an Atari Punk Console. Controls are frequency and pulse width (with switchable LDRs), input and output volume, switches for effect or generator modes and input signal routing to freq or PW. And there's a tiny LED in the middle of the fur.


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PHOBoS



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PostPosted: Sat Dec 24, 2011 7:32 pm    Post subject: Ho, Ho, Ho
Subject description: Annual Christmas build - 2011
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I just finished my annual X-mas build for this year. It has a sound chip with
some added extra's and off course some flashy X-mas lights.



santa Ho, Ho, Ho, Merry X-mas everybody @ electro-music.com santa


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fonik



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PostPosted: Tue Dec 27, 2011 12:36 am    Post subject: Reply with quote  Mark this post and the followings unread

haha! what a nice build. look like the ultimate christmas pinball machine to mee...
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Captain Biscuits



Joined: Jun 11, 2010
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PostPosted: Wed Jan 11, 2012 3:57 pm    Post subject: A Modular is never Finished but . . .
Subject description: mine has reached a sort of "that'll do for now" moment.
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Been building bits of this for about 2 years on and off I guess starting with an MFOS mini synth, then an MFOS 10 step, 3 VCOs, etc etc
Finally completed a case with 2 LFOs, a dual AR EG and a low pass filter around Christmas.
Planning to play with some CMOS/Lunetta bits to get some interesting beats (largely based on Bruce's You Tube Vid of his Quad bass and lunetta combo) next.
Then there's a Klee part made which needs finished and 2 or 3 Thomas Henry VCOs to make up.
Oh - and a Chaquo pcb on the way from the Bridechamber and an MFOS MFM to play with - and an Appendage board in a cupboard somewhere Smile
So not finished - but it's reached a point where I'm kind of chuffed with it at last and enjoying playing with it!


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PHOBoS



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PostPosted: Wed Jan 11, 2012 5:03 pm    Post subject: Reply with quote  Mark this post and the followings unread

looks great, love the pixie panels! dwarf
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mosc
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PostPosted: Wed Jan 11, 2012 5:31 pm    Post subject: Re: A Modular is never Finished but . . .
Subject description: mine has reached a sort of "that'll do for now" moment.
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Captain Biscuits wrote:
Been building bits of this for about 2 years on and off I guess


wow! looks amazing...

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Cynosure
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PostPosted: Wed Jan 11, 2012 6:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

Captain Biscuits - I love the panel designs!
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fluxmonkey



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PostPosted: Thu Jan 12, 2012 6:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

if you didn't click on Cap'n B's pics to get the fullsize closeups, go back and do it now! wonnerful on all counts, CB.

on a side note, innit time for a new 2012 build thread?

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