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 Forum index » DIY Hardware and Software » fonik's place
Voltage Controlled OpAmp RingMod (Modulator)
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adambee7



Joined: Apr 04, 2009
Posts: 420
Location: united kingdom

PostPosted: Thu Mar 04, 2010 7:38 am    Post subject: Reply with quote  Mark this post and the followings unread

Another excellent piece of work Matthias. When you get either version ready for sale I'll have 4. Cool.
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LektroiD



Joined: Aug 23, 2008
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PostPosted: Fri Mar 05, 2010 4:56 am    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:


RingMod Components Side


Some liquid flux would prevent those solder tails on the ICs, and make the whole SMT soldering experience a lot easier. Look out for a needle flux dispenser bottle too. I presume you're using solder paste too? (solder-wire is a nightmare on SMT).

Looking great though! I can't wait the production run thumb up

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fonik



Joined: Jun 07, 2006
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PostPosted: Fri Mar 05, 2010 5:12 am    Post subject: Reply with quote  Mark this post and the followings unread

LektroiD wrote:
Some liquid flux would prevent those solder tails on the ICs, and make the whole SMT soldering experience a lot easier. Look out for a needle flux dispenser bottle too. I presume you're using solder paste too? (solder-wire is a nightmare on SMT).

i AM using solder-wire Shocked it is 0.5mm and works quite fine on the 1206 packages IMHO.
however, i believe you and will try additional flux on the ICs. i have dispenser already...

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LektroiD



Joined: Aug 23, 2008
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PostPosted: Fri Mar 05, 2010 9:21 am    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
LektroiD wrote:
Some liquid flux would prevent those solder tails on the ICs, and make the whole SMT soldering experience a lot easier. Look out for a needle flux dispenser bottle too. I presume you're using solder paste too? (solder-wire is a nightmare on SMT).

i AM using solder-wire Shocked it is 0.5mm and works quite fine on the 1206 packages IMHO.
however, i believe you and will try additional flux on the ICs. i have dispenser already...


With paste it leaves your hand free to steady the component with tweezers, rather than holding the wire / tweezers and soldering iron - which would be ok if you had 3 hands.. Wink

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fonik



Joined: Jun 07, 2006
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PostPosted: Fri Mar 05, 2010 10:04 am    Post subject: Reply with quote  Mark this post and the followings unread

wouldn't i need a stencil?
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TekniK



Joined: Aug 10, 2008
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PostPosted: Fri Mar 05, 2010 10:48 am    Post subject: Reply with quote  Mark this post and the followings unread

i use the point of a compass to positioning a smd component in place and to hold him in place when i solder it,i applie wire solder first on one side of the pad on the pcb ,it goes faster as soldering classic components..

There are tutorials on youtube how to do it fast.
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diablojoy



Joined: Sep 07, 2008
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PostPosted: Fri Mar 05, 2010 8:26 pm    Post subject: Reply with quote  Mark this post and the followings unread

and i just hold everything in place with tiny bits of blue tack
and solder everything with a normal iron and .71 mm solder wire
works fine I only pick up the iron twice for the entire board ,very fast. there are seemingly many ways to do the same thing
1.5 mm solder wick will also get rid of the those tails very quickly and make those IC's very neat , just leaving solder under the tags only.

fonik do you plan to make the surface mount boards available ?
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fonik



Joined: Jun 07, 2006
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PostPosted: Sat Mar 06, 2010 8:07 am    Post subject: Reply with quote  Mark this post and the followings unread

1st i place a little bit of solder to one one pad for each component.
i then place and fix all components reheating the solder.
in a third run i solder the left pads.
it is indeed faster than TH.

i see more interest in SMD, however the majority still wants TH? i will start a poll...

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fonik



Joined: Jun 07, 2006
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PostPosted: Mon Mar 29, 2010 12:57 pm    Post subject: Reply with quote  Mark this post and the followings unread

here's a short sample of the module.

two squarewave oscillators are used. the carrier oscillator gets controlled by the sequencer. the sequencer also controlls the carriers input.
the modulator input gets controlled by a LFO.
i am playing with the settings of the VCMod, even some nice gate/VCa action is possible.

VC Mod01 by fonitronik

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TekniK



Joined: Aug 10, 2008
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PostPosted: Mon Mar 29, 2010 1:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hmm,Matt did u made some hi/lo freq. bell sounds tryout recordings aswell,using a sine?
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fonik



Joined: Jun 07, 2006
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PostPosted: Mon Mar 29, 2010 1:58 pm    Post subject: Reply with quote  Mark this post and the followings unread

ringmod for bell sound? funny idea! Wink

okay, i tried my best just for you. i mean, i am not that good in generating specific sounds on my modular... anyways, here an LFO controlled the modulating sine. the output goes to a envelope controlled ssm2044 filter (no resonance).


VC_Mod_bell01.mp3
 Description:

Download
 Filename:  VC_Mod_bell01.mp3
 Filesize:  215.25 KB
 Downloaded:  481 Time(s)


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TekniK



Joined: Aug 10, 2008
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PostPosted: Mon Mar 29, 2010 2:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
ringmod for bell sound? funny idea! Wink

okay, i tried my best just for you. i mean, i am not that good in generating specific sounds on my modular... anyways, here an LFO controlled the modulating sine. the output goes to a envelope controlled ssm2044 filter (no resonance).


nice,it sounds good,thanks!


if u have some at higer freqs, also welcome Smile
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LektroiD



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PostPosted: Mon Mar 29, 2010 9:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi Fonik,

I have a couple of questions;

1 Has it been decided whether this project will be through-hole, or surface mount technology (or maybe half of each)?

2, what time frame have you estimated before these are ready?

I'm really looking forward to this project, even though I already have a Moog ring-modulator.

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fonik



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PostPosted: Mon Mar 29, 2010 11:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

i will be on vacation soon. so the higher pitch bells will have to wait. the VC Clock and VC Mod TH ProtoPCBs are in. i think i will have built and tested them end of month. after that i will ask for interest.
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TekniK



Joined: Aug 10, 2008
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PostPosted: Tue Mar 30, 2010 4:10 am    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
i will be on vacation soon. so the higher pitch bells will have to wait. the VC Clock and VC Mod TH ProtoPCBs are in. i think i will have built and tested them end of month. after that i will ask for interest.


EnjoY,ur vacation matt!
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fonik



Joined: Jun 07, 2006
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PostPosted: Wed Mar 31, 2010 11:53 am    Post subject: Reply with quote  Mark this post and the followings unread

okay, last minute bells.
i don't have all my gear at one place currently, not to talk about set up for recording. so at the moment it is always a little bit complicated to record my modular, i have to move things around. will change this later this year...


VC_Mod_bell03.mp3
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 Filename:  VC_Mod_bell03.mp3
 Filesize:  171.57 KB
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TekniK



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PostPosted: Wed Mar 31, 2010 1:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
okay, last minute bells.
i don't have all my gear at one place currently, not to talk about set up for recording. so at the moment it is always a little bit complicated to record my modular, i have to move things around. will change this later this year...


Thanks matt!

am in for some pcb's if there is a run
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a100user



Joined: Oct 28, 2003
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PostPosted: Wed Mar 31, 2010 11:50 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'll take one as well if you do the run please.

David
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Junk Rhythm



Joined: Jan 07, 2008
Posts: 81
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PostPosted: Thu Jun 24, 2010 9:07 am    Post subject: Reply with quote  Mark this post and the followings unread

I'll take two as well.
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Danno Gee Ray



Joined: Sep 25, 2005
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PostPosted: Thu Jun 24, 2010 3:36 pm    Post subject: Reply with quote  Mark this post and the followings unread

I would likely be interested as well.
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Tim Servo



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PostPosted: Fri Jun 25, 2010 11:12 am    Post subject: Reply with quote  Mark this post and the followings unread

Hey Mattias,

I notice you've got expo current sources running the input VCAs. I'm assuming it sounds just fine, but have you also tried it with the "standard" linear VCAs?

Tim (non-linear) Servo
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fonik



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PostPosted: Fri Jun 25, 2010 2:12 pm    Post subject: Reply with quote  Mark this post and the followings unread

Tim Servo wrote:
Hey Mattias,

I notice you've got expo current sources running the input VCAs. I'm assuming it sounds just fine, but have you also tried it with the "standard" linear VCAs?

Tim (non-linear) Servo

not yet. do you think it would geive me better control/response? when turning the knobs it felt/sounded quite right...

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Tim Servo



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PostPosted: Fri Jun 25, 2010 5:14 pm    Post subject: Voltage Controlled Ring Modulator Module (OpAmp based) Reply with quote  Mark this post and the followings unread

Makes sense. Controlling an expo VCA with a linear CV pot will give you a natural sounding exponential response. I don't know if it will still sound correct when controlled with an exponential envelope though. My guess is that it won't be a problem, but it's worth checking.

Tim (doesn't make sense, but that doesn't keep me from trying) Servo
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fonik



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PostPosted: Sun Jun 27, 2010 10:19 am    Post subject: Re: Voltage Controlled Ring Modulator Module (OpAmp based) Reply with quote  Mark this post and the followings unread

Quote:
Tim (doesn't make sense, but that doesn't keep me from trying) Servo
thumb up
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mono-poly



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PostPosted: Sun Jun 27, 2010 11:07 am    Post subject: Reply with quote  Mark this post and the followings unread

Is this also coming as an euro module?
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