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 Forum index » DIY Hardware and Software
2011 Build Pictures
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adamon



Joined: May 15, 2009
Posts: 95
Location: Lawrence Kansas
Audio files: 3

PostPosted: Wed Jan 05, 2011 2:59 pm    Post subject: 2011 Build Pictures Reply with quote  Mark this post and the followings unread

Finally built another module for my system yesterday: its a quad analog switch with a few bells and whistles (center module in the pic).

It's basically a break-out of a 4066 paired with a 40106. The inputs/outputs of the four switches are the black jacks. Each control gate (red jack) is either fed directly to the switch, or is inverted first (via the 40106 chosen by the first column of switches on the left). The three lower control gates can all be chained to the control jack directly above each one (second column of switches), allowing for multiple switches to be controlled by a single input. The LEDs indicate when a gate is triggered.

There are a lot of cool combinations possible when chaining the control gates: if you run a single input into two inputs, make the two switches share the same control signal but invert one, you get a SPDT (a signal router basically). If you double this, you can get a DPDT. There's all sorts of other combos as well. It pairs very nicely with a gate sequencer as well (becomes a sequential switch basically).

There's also an extra hole drilled near the bottom for good measure (honestly... I didn't mess up... really...). Its like eating black-eyed peas for new years... right?

Looking forward to seeing what others build this year; last year's progress was truly amazing! Here's to a new year of building!


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frantik



Joined: Dec 23, 2010
Posts: 18
Location: san jose, ca
Audio files: 1

PostPosted: Fri Jan 07, 2011 8:51 pm    Post subject: Reply with quote  Mark this post and the followings unread

well here's my pacman synth, my first synth build. finished last night, well.. it's almost done.. need to decide on the power source.. probably will be a 9v battery clip but also might go with the 4 AA battery pack since i have rechargeable batteries.. and/or i might add an external power supply jack. The synth runs on 3 555 oscillators (well 1 555 and 1 556) and can be configured in various ways including the Atari Punk Console

audio: http://soundcloud.com/trikome/pacman-synth

pics:
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layout of the RCA jacks:

Red - Osc 1
White - Osc 2/LFO
Yellow - Monostable Osc/Atari Punk Console

Top - Out
Bottom - CV for Osc 1 & 2, Trigger for APC
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haxster



Joined: Feb 01, 2006
Posts: 244
Location: MONTEREY PARK, CA 91754
G2 patch files: 2

PostPosted: Sat Jan 08, 2011 12:07 am    Post subject: Reply with quote  Mark this post and the followings unread

What kind of pots are those on the pacman synth?
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frantik



Joined: Dec 23, 2010
Posts: 18
Location: san jose, ca
Audio files: 1

PostPosted: Sat Jan 08, 2011 2:49 am    Post subject: Reply with quote  Mark this post and the followings unread

they're 1meg but i dont know anything else about them.. found them in a bin at a surplus store
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inlifeindeath



Joined: Apr 02, 2010
Posts: 315
Location: Albuquerque, NM

PostPosted: Sat Jan 08, 2011 7:19 am    Post subject: Reply with quote  Mark this post and the followings unread

i'd definately go with the 9v. i've not had good sucess with the 555/556 chips at anything under that and 4 x AA's would bring you to 6v.
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frantik



Joined: Dec 23, 2010
Posts: 18
Location: san jose, ca
Audio files: 1

PostPosted: Sat Jan 08, 2011 12:04 pm    Post subject: Reply with quote  Mark this post and the followings unread

well i have rechargables so i's actually 4.8v but it currently works fine using the 4 AA battery pack (the recording i posted used it)
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diablojoy



Joined: Sep 07, 2008
Posts: 795
Location: melbourne australia
Audio files: 11

PostPosted: Sun Jan 09, 2011 12:14 am    Post subject: Reply with quote  Mark this post and the followings unread

1 octave pedal board
salvaged from a home organ i got for free and then rehoused in some nice timber with a mfos single buss keyboard controller cct
timbers are figured maple , blackwood , jarrah and some cocobolo
finally completely finished something Laughing took a while


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davemoog



Joined: Feb 23, 2008
Posts: 52
Location: Vancouver

PostPosted: Sun Jan 09, 2011 11:17 am    Post subject: Reply with quote  Mark this post and the followings unread

wow! beautiful work there.
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inlifeindeath



Joined: Apr 02, 2010
Posts: 315
Location: Albuquerque, NM

PostPosted: Sun Jan 09, 2011 11:37 am    Post subject: Reply with quote  Mark this post and the followings unread

thats a work of art dude, awesome work!
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Juno60



Joined: Feb 09, 2006
Posts: 26
Location: Germany

PostPosted: Wed Jan 12, 2011 4:36 am    Post subject: Reply with quote  Mark this post and the followings unread

Here's what I've finished during the last year before I had to break my DIY for we're havin' a baby next month...

Most circuits are taken from Ray Wilsons WP20 Synth. Smile The VCO and the WP-20 VCF are build on stripboard. The second VCF is an EFM Korg Delta Style VCF. All modules are working fine. The case isn't pretty, but it will get a better case later on.


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fonik



Joined: Jun 07, 2006
Posts: 3759
Location: Germany
Audio files: 23

PostPosted: Wed Jan 12, 2011 12:34 pm    Post subject: Reply with quote  Mark this post and the followings unread

diablojoy wrote:
1 octave pedal board

this is awesome!

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cheers,
matthias
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Boogdish



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

PostPosted: Wed Jan 12, 2011 8:21 pm    Post subject: Reply with quote  Mark this post and the followings unread

First three panels of the new cabinet are done.
1.A pair of splitters and the power switch/fuse/pilot lamp
2.Steiner VCF
3.Two Rene Schmitz VCAs.

I'm gonna get so good at engraving by the time I fill this cabinet.
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emdot_ambient



Joined: Nov 22, 2009
Posts: 669
Location: Frederick, MD

PostPosted: Fri Jan 14, 2011 9:28 am    Post subject: Reply with quote  Mark this post and the followings unread

Well...OK, it's not actually built yet...but it looks like it!

Finally got my first real synth panel in yesterday and stayed up til like 1:00AM installing the hardware (some of it temporary, as I didn't pay attention to pot values, just wanted to see what it would really look like, make sure all the drill holes were correct and that I didn't accidentally place some components too close to the mounting rails...it all tested out fine).

Now all I have to do is make the PCB mounting brackets, finish the last niggling circuit corrections, calibration, testing, bug fixing...oh...and of course ALL the wiring Crying or Very sad

...my camera is a piece of sh!t...


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TekniK



Joined: Aug 10, 2008
Posts: 1062

PostPosted: Fri Jan 14, 2011 11:57 am    Post subject: Reply with quote  Mark this post and the followings unread

emdot_ambient wrote:
...but it looks like it!

F


It looks awesome,congratulations

superb graphic layout
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rosch



Joined: Oct 03, 2009
Posts: 162
Location: germany

PostPosted: Fri Jan 14, 2011 1:54 pm    Post subject: Reply with quote  Mark this post and the followings unread

very good looking indeed.
but diablojoy, that's a beauty!
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bubzy



Joined: Oct 27, 2010
Posts: 555
Location: United Kingdom
Audio files: 62

PostPosted: Sun Jan 16, 2011 1:44 am    Post subject: Reply with quote  Mark this post and the followings unread

Mostly finished, modules are (left to right)

Mfos multi noise /random gate generator
mfos single chip sample and hold
thomas henry icl8038 vco
steiner synthacon filter (from the japanese guys pcb layout)
ken stones cynare cgs 47
mfos ultra simple mono mixer
belcat delay pedal (mounted onto a panel)
hip bass drum (from this forum.... sounds EXCELLENT)

still have psu to build and a little tweaking on some modules but overall its a nice rack to play with (if you'll excuse the innuendo)


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PHOBoS



Joined: Jan 14, 2010
Posts: 1746
Location: Moon Base
Audio files: 347

PostPosted: Mon Jan 17, 2011 5:45 am    Post subject: Smurf Sequencer
Subject description: First finished build of 2011
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I wanted to make a simple analog sequencer for testing purposes, but as
usual I couldn't stop myself from adding a couple more things.
It has a (binary) pattern generator, a sort of glide control, a VCO
and a filter. The buttons on the left are for step control and reset, the
connectors on the right are from top to bottom:
12V DC in, ext. CLK in, int. CLK out, CV out (sequencer), CV in (VCO),
Audio Out (VCO)

Build on blue perf as a tribute to Dave's amazing blue modular bigsmurf


(that 1 octave pedal board by diablojoy looks amazing, I really like the
molten plastic/organic look)


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http://phobos.000space.com/ http://www.acidtrash.com/ Stickney Synthyards

Last edited by PHOBoS on Mon Jan 17, 2011 8:54 am; edited 1 time in total
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inlifeindeath



Joined: Apr 02, 2010
Posts: 315
Location: Albuquerque, NM

PostPosted: Mon Jan 17, 2011 7:18 am    Post subject: Reply with quote  Mark this post and the followings unread

very cool sequencer! what are the DIP switches for? and could you explain the binary pattern generator a little bit? thanks!
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PHOBoS



Joined: Jan 14, 2010
Posts: 1746
Location: Moon Base
Audio files: 347

PostPosted: Mon Jan 17, 2011 8:52 am    Post subject: Smurf Sequencer
Subject description: pattern generator
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inlifeindeath wrote:
very cool sequencer! what are the DIP switches for? and could you explain the binary pattern generator a little bit? thanks!

The DIP switches are there to set the patterns which works as follows:
The CLK signal goes to a binary puls divider (4040). 8 outputs of this divider
are connected to the DIP switches via diodes so switch 1 on DIP A,B,C has
CLk /2 connected, switch 2 of DIP A,B,C has CLk /4 connected and so on.
The other sides of the switches are shorted together (per DIP) and connected
to inputs A,B,C of an analog multiplexer (4051). The binary code on these
inputs selects which analog input is connected to the output. These inputs are
connected to the pots to set the voltage, output is connected to an opamp
that is configured as a voltage follower. hope that clears it up a bit Smile

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-minus-



Joined: Oct 26, 2008
Posts: 761

Audio files: 13

PostPosted: Mon Jan 17, 2011 10:13 am    Post subject: Re: Smurf Sequencer
Subject description: First finished build of 2011
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PHOBoS wrote:

Build on blue perf as a tribute to Dave's amazing blue modular bigsmurf


...and as a tribute to the "boys in blue" too no doubt Wink . Nice looking object!
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Skrog Productions



Joined: Jan 07, 2009
Posts: 766
Location: Scottish Borders
Audio files: 87

PostPosted: Mon Jan 17, 2011 10:19 am    Post subject: Reply with quote  Mark this post and the followings unread

Thank you Phobos , that's a cool sequencer / osc / filter combo , and i love the blue colour Smile.

Dave.
(builder of blue modular).
Very Happy

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Skrog Productions



Joined: Jan 07, 2009
Posts: 766
Location: Scottish Borders
Audio files: 87

PostPosted: Mon Jan 17, 2011 10:26 am    Post subject: Reply with quote  Mark this post and the followings unread

bubzy wrote:
Mostly finished, modules are (left to right)

Mfos multi noise /random gate generator
mfos single chip sample and hold
thomas henry icl8038 vco
steiner synthacon filter (from the japanese guys pcb layout)
ken stones cynare cgs 47
mfos ultra simple mono mixer
belcat delay pedal (mounted onto a panel)
hip bass drum (from this forum.... sounds EXCELLENT)

still have psu to build and a little tweaking on some modules but overall its a nice rack to play with (if you'll excuse the innuendo)



That's a good choice / selection of modules there Bubzy , You'll be sound creating for hours with your rig Smile

Dave.

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kkissinger



Joined: Mar 28, 2006
Posts: 1216
Location: Kansas City, Mo USA
Audio files: 29

PostPosted: Mon Jan 17, 2011 4:08 pm    Post subject: A new Yusynth Diode Ladder Filter Reply with quote  Mark this post and the followings unread

This filter is a clone of the VCS3 filter. The resonant response sounds gritty or bubbly depending on the setting of the resonance level and the input signal level.

This filter was fun to build and adds another 'flavor' to the synthesizer.


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The front panel of my Yusynth Diode Ladder (VCS3 filter clone) filter with two additional audio inputs.
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View of the PCB. I've switched to color-coded ribbon cable. You can see the four capacitors of the ladder on the right-top section of the PCB. The diodes surround the caps however they are so tiny that they don't show up that well in the photo.
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PHOBoS



Joined: Jan 14, 2010
Posts: 1746
Location: Moon Base
Audio files: 347

PostPosted: Tue Jan 18, 2011 12:04 pm    Post subject: Re: Smurf Sequencer
Subject description: First finished build of 2011
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-minus- wrote:
...and as a tribute to the "boys in blue" too no doubt Wink . Nice looking object!

Thank you,.. pig

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kkissinger



Joined: Mar 28, 2006
Posts: 1216
Location: Kansas City, Mo USA
Audio files: 29

PostPosted: Tue Jan 18, 2011 9:43 pm    Post subject: Just finished a Yusynth Transistor Ladder filter
Subject description: a Minimoog filter clone
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This module came to life and required no troubleshooting (**hurray!!**). I just calibrated it and that was that.

As all the other Yusynth filters that I've built, the Transistor Ladder filter is clean and musical.

Yves designed the filter to be a minimoog filter clone and its rolloff -- 24db/8ve -- is noticeably more pronounced than my Aries Multimode filters (which are 12db/8ve).


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The front panel. The Yusynth design call for two inputs and I went ahead and added two additional inputs.
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My youngest son, Matthew (who goes by the nickname "Tom") is holding the Transistor Ladder filter to reveal its PCB and wiring.
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