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 Forum index » DIY Hardware and Software
2012 Build Pictures
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elmegil



Joined: Mar 20, 2012
Posts: 1504
Location: Chicago
Audio files: 14

PostPosted: Sat Jul 21, 2012 11:49 am    Post subject: Reply with quote  Mark this post and the followings unread

I found a weird shaped surround sound speaker, stripped the cloth covering, and spray painted it. The crackling was accidental, but I decided I liked it so I didn't strip it and start over. I've tried to find more of this model speaker, but they can't seem to be found. In fact there was only this one at the thrift where I found it....
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bod



Joined: Apr 28, 2009
Posts: 148
Location: Glasgow

PostPosted: Sat Jul 21, 2012 4:16 pm    Post subject: Reply with quote  Mark this post and the followings unread

Good find! At least you know it's unique Smile
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Skrog Productions



Joined: Jan 07, 2009
Posts: 778
Location: Scottish Borders
Audio files: 87

PostPosted: Sat Jul 28, 2012 7:18 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi there
Finished a mfos WSG build for a friend & added some mods.

i used a 9v battery tray / holder round the back for easy bat changing, i used Ray's cv & gate input mods from the mfos website , also put 2 lfo timing cap's on a dp/dt toggle switch to give high / low speeds.

I included a switch on each of the 4 oscs to select between external cv in / center off / osc master sweep dial , the osc sweep is really a pot voltage divider which sweeps any or all of the 4 oscs ( sounds good through a delay fx ) .

Squeezed into a 140mm x 170mm sloped project box.

Dave.


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macumbista



Joined: Sep 12, 2007
Posts: 361
Location: berlin
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PostPosted: Tue Jul 31, 2012 5:34 pm    Post subject: Reply with quote  Mark this post and the followings unread

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

Spent quite a bit of July working on this chopper with a student from Spain. He didn’t quite finish it… a problem if you’re a Spanish dude in your early 20’s with too many friends around I suppose. Synth building is a solitary pursuit. So consider this a work in progress.

Tech details: line input, mic input, 2 x line outputs, dual VCA, 2 x VCO, dual VC Slope, Utility LFO, DC Mixer, Steiner VC Filter, Wave Multiplier. All PCBs by Ken Stone/CGS.

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Custom/handmade experimental instruments
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RingMad



Joined: Jan 15, 2011
Posts: 232
Location: Montreal, Canada
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PostPosted: Wed Aug 01, 2012 6:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

Oooof... just finished another one-off electronic sound box... this time, a customized version of my Spacial Percussionizer [ http://www3.bell.net/james.schid/schidlowsky_esb.html#spacialperc ] for a sound-maker friend. He wanted a grey box with 4-channel output instead of 2, as well as all the trigger and spatializing oscillators voltage controlled. The power jack & switch and output jacks are on the back side.

At the heart of it, a CMOS NAND gate “percussion”/noise generator with 4052 spatializers (with 4 positions per pair of channels), both of which Inventor came up with.

This was my biggest box project yet... in terms of number of chips and panel hardware. Each time I build something, I learn stuff, and still make new mistakes.

James.


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sonicwarrior



Joined: Dec 22, 2005
Posts: 230
Location: Cologne, Germany

PostPosted: Thu Aug 02, 2012 12:36 pm    Post subject: Reply with quote  Mark this post and the followings unread

@RingMad:

At first I thought that was a cake and got an appetite for it. Laughing
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JingleJoe



Joined: Nov 10, 2011
Posts: 878
Location: Lancashire, England
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PostPosted: Thu Aug 02, 2012 2:33 pm    Post subject: Reply with quote  Mark this post and the followings unread

sonicwarrior wrote:
@RingMad:

At first I thought that was a cake and got an appetite for it. Laughing

How did you even make that mistake!? In what way does that look like a cake!? Laughing

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sonicwarrior



Joined: Dec 22, 2005
Posts: 230
Location: Cologne, Germany

PostPosted: Thu Aug 02, 2012 3:17 pm    Post subject: Reply with quote  Mark this post and the followings unread

They are many pictures of synth cakes out there and it looks very similar to them. Very Happy
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Inventor
Stream Operator


Joined: Oct 13, 2007
Posts: 5978
Location: San Antonio, Tx, USA
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PostPosted: Thu Aug 02, 2012 3:27 pm    Post subject: Reply with quote  Mark this post and the followings unread

Apparently RingMad can have his synth and play it too!

Les

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RingMad



Joined: Jan 15, 2011
Posts: 232
Location: Montreal, Canada
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PostPosted: Thu Aug 02, 2012 4:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

Synth cake?!

I've rarely seen any grey cakes, though.

But... I'll take it as a compliment, so thanks!

Ha, good one Les, but the friend I built it for has it now and is working on a composition that will use it. I'm eager to hear what he will do with it, but also a little worried about if I messed up and it breaks down in the middle of the concert.

James.
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Inventor
Stream Operator


Joined: Oct 13, 2007
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PostPosted: Thu Aug 02, 2012 7:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

RingMad: Ancient proverb say: Old man looked back and said "Most of the things I worried about never happened".

Les

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JingleJoe



Joined: Nov 10, 2011
Posts: 878
Location: Lancashire, England
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PostPosted: Fri Aug 03, 2012 1:55 pm    Post subject: Reply with quote  Mark this post and the followings unread

Inventor wrote:
RingMad: Ancient proverb say: Old man looked back and said "Most of the things I worried about never happened".

Les

As they say on the streets: True dat.

P.S. by jove he's right!
http://websound.ru/issues/171_175/synth-cake.jpg
http://www.synthgear.com/wp-content/uploads/2009/05/synthesizer_cake.jpg

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sduck



Joined: Dec 16, 2007
Posts: 442
Location: Nashville
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PostPosted: Sat Aug 04, 2012 9:23 pm    Post subject: Reply with quote  Mark this post and the followings unread

Here's a Random Looping Sequencer:

Random Looping Sequencer front

Random Looping Sequencer profile

Random Looping Sequencer back

note the Extremely High Tech® pcb mounting method - it's a euro pcb, and has no conventional mounting holes, so I got these really cool nylon pcb mounting thingies, but the existing holes (borrowed from hardware I didn't use on the pcb) weren't big enough, so I had to X-acto the nylon grabber things down to a size that would fit, but then they wouldn't hold the pcb in all the needed directions, so I slapped a bit of super sexy cable tie around the whole mess. Problem solved.
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mosc
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PostPosted: Sun Aug 05, 2012 1:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

sduck wrote:
I slapped a bit of super sexy cable tie around the whole mess. Problem solved.


Very nice. If you would have used just an ordinary cable tie instead of the super sexy one, the project would not be nearly as nice. Laughing

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Boogdish



Joined: Sep 21, 2009
Posts: 122
Location: Bloomington, IN

PostPosted: Wed Aug 08, 2012 6:54 pm    Post subject: Reply with quote  Mark this post and the followings unread

New proto-PCBs in for three new designs! I guess this isn't technically a build photo, but I'm just really excited to be getting new stuff done. I got them done by OSH Park and it was the fastest turnaround on protoPCBs I've had, and at a reasonable price.
Posted Image, might have been reduced in size. Click Image to view fullscreen.
Left is the Voltage To Rhythm converter. Center is a little utility module that's an attenuater/amplifier/offsetter with LEDs for indicating if you're over or under a certain voltage. Right is the rotating Track And Hold, which can also function as a standard sequential switch. I'll be writing more about these/gauging interest when I make sure I've got all the bugs out of the system.
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PHOBoS



Joined: Jan 14, 2010
Posts: 1796
Location: Moon Base
Audio files: 351

PostPosted: Thu Aug 09, 2012 2:21 pm    Post subject: ADRAIN 8
Subject description: vintage drumbox
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While I was cleaning up a bit I stumbled on an old (1977) book I got some time ago, on how to
build your own electronic organ. The circuits are pretty outdated and all transistor based but
there's also a section in it with percussion circuits and from what I understand they are the
circuits from the Thomas Bandmaster.

So I breadboarded them and was pretty happy with the sound considering they are mostly very simple
1 transistor circuits. Most of them are actually exactly the same except for component values. The
brush cymbal, snaredrum and hi-hat also share a noise section and the snaredrum has an AMV for
drumrolls. I couldn't build the crash cymbal since it needs a 1H inductance, which is a bit hard
to find and expensive. I did get the right inductance for the brush cymbal (well almost). but
somehow it causes noise to bleed through without being triggered. So at the moment I have that
desoldered which makes it sound more similar to the snare/hi-hat. Rolling Eyes
(I might get that fixed somehow someday)

There wasn't really a hi-hat circuit in the book, so I adapted the crash cymbal circuit a bit for
that. Originaly the tone pots where trimpots parallel to a smaller resistor, so I increased the
resistance of those and added some real pots instead. I also added extra switchable caps to the
snare/brush/hi-hat for longer decay times, and changed some of the component values.

Each drumsound has a gain circuit added to get it to a decent line level and then goes to an
EFX S/R jack (shorted when nothing is plugged in). The snaredrum has this for both the snare and
drum section. After that the signals go through a level pot, pan pot and are mixed together.
(as a bonus I can also use it as just a mixer, by plugging something into the EFX Return)

The trigger inputs all have comparators and a simple on/off switch. The interface connector.
has all the 9 trigger inputs (8 sounds + drumroll) and power (2 pins for +12V, 1 pin for -12V,
and 3 pins for GND) It has a build in PSU and I put a XLR connector on the side with the RAW DC
voltage to power my other synths from it. So 'next' will be a controller, probably something PIC-
based or maybe pure CMOS. And I could also make a drumpad for it


For the case I used a vintage 70's breadbin (one of those eureka! shower moments).
O and did I mention that it has nice colorful LED's Laughing

so may I present to you:

ADRIAN 8 Cool

and for those wondering what ADRIAN might stand for (Analog, Drum, Interface, ehm,.. thinking )
no, it doesn't mean anything (yet), but is a reference to Adrian from the movie Liquid Sky.




ok. let me shut up now and show you some pics and a demo:
(front is not fully attached yet with all the screws in case I need to change something)


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PHOBoS - ADRIAN 8 demo (Aug 09, 2012).mp3
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ADRIAN 8 controlled by Mad Monkey Seq + Divider

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Last edited by PHOBoS on Thu Aug 09, 2012 5:10 pm; edited 1 time in total
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mosc
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PostPosted: Thu Aug 09, 2012 3:58 pm    Post subject: Reply with quote  Mark this post and the followings unread

Very nice looking piece of gear, for a PhoBoSapien. Smile
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elmegil



Joined: Mar 20, 2012
Posts: 1504
Location: Chicago
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PostPosted: Thu Aug 09, 2012 5:10 pm    Post subject: Reply with quote  Mark this post and the followings unread

Inspired use of a breadbox Smile
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Skrog Productions



Joined: Jan 07, 2009
Posts: 778
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PostPosted: Sat Aug 11, 2012 2:49 am    Post subject: Reply with quote  Mark this post and the followings unread

wow , what a fantastic drum box, phobos , really well laid out and those s/r fx jacks are a great idea , did you have to put a stomp box level converter circuit in or are fx pedals ok with the instrument levels ? .

sounds great too , i was thinking Fad Gadget / the Normal , early mute records , Excellent build Smile Smile Smile


DAVE.

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PHOBoS



Joined: Jan 14, 2010
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PostPosted: Sat Aug 11, 2012 6:42 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks Howard, elmegil, Dave Very Happy

Skrog Productions wrote:
..,did you have to put a stomp box level converter circuit in or are fx pedals ok with the instrument levels ?

I don't have any pedals myself only effects that are build for line level use so I adjusted it for that.
But if I'm correct most pedals have a input level attenuator so that should work. Actually I see them
being used for line level signals all the time Smile

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elmegil



Joined: Mar 20, 2012
Posts: 1504
Location: Chicago
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PostPosted: Sat Aug 11, 2012 7:24 am    Post subject: El Cerrito Reply with quote  Mark this post and the followings unread

Here's my El Cerrito build, just finished. Working on VCA/VCF so I can actually "play" it, but I've messed around with it some and like it a lot so far.

Horizontal mounting is to help with my space constraints, I have a directive from above to keep myself within the space of a single shelf (which makes me consider switching to Euro format, but...I don't like little knobs and jacks, so not yet).


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ashleym



Joined: Aug 20, 2009
Posts: 181
Location: uk

PostPosted: Sat Aug 11, 2012 11:53 am    Post subject: Reply with quote  Mark this post and the followings unread

Quite a tricky build as this isnt from standard parts. Actually a present from my girlfriend and I built it quickly. I will post a link if anyone likes it. And sorry one picture is upside down


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Blue Hell
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Joined: Apr 03, 2004
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PostPosted: Sat Aug 11, 2012 12:42 pm    Post subject: Reply with quote  Mark this post and the followings unread

Cool Lego Thing!
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elmegil



Joined: Mar 20, 2012
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Location: Chicago
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PostPosted: Sat Aug 11, 2012 8:20 pm    Post subject: Reply with quote  Mark this post and the followings unread

Would love to see a link.

Those don't look like legos though, more like those tiny versions...which I can't find right now Smile
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PHOBoS



Joined: Jan 14, 2010
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PostPosted: Sun Aug 12, 2012 2:26 am    Post subject: Reply with quote  Mark this post and the followings unread

looks like ministeck Cool
but you can't stack those as far as I know Rolling Eyes

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