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Prototype breadboard?

Prototype breadboard?

2005-10-18 by brownchonald

Hello,

Do you guys recommend a prototyping breadboard? Solderless and
powered, to build some of the module circuits that are online.

I've been looking at this:
http://www.elexp.com/tst_234.htm

but not sure if I need all those knobs and switches.

Thhanks,
Cole

Re: Prototype breadboard?

2005-10-18 by Adam Schabtach

You can obtain just the breadboard itself for a lot less money, and you
could either use your modular's power supply or buy/build a bench supply.
Total cost would still be less than that package. You won't need both +/-12
and +/-15V supplies (one or the other--probably 15 if you're using MOTM
which I believe you are), you may not need +5, and you probably won't need
the digital I/O stuff. The function generator would be handy now and then,
but not essential. So in other words, buying that package means spending
money on stuff you aren't likely to use.

--Adam
Show quoted textHide quoted text
> -----Original Message-----
> From: brownchonald [mailto:chonald@...]
> Sent: Monday, October 17, 2005 7:37 PM
> To: cgs_synth@yahoogroups.com
> Subject: [cgs_synth] Prototype breadboard?
>
> Hello,
>
> Do you guys recommend a prototyping breadboard? Solderless and
> powered, to build some of the module circuits that are online.
>
> I've been looking at this:
> http://www.elexp.com/tst_234.htm
>
> but not sure if I need all those knobs and switches.
>
> Thhanks,
> Cole
>
>
>
>
>
>
> The CGS Modular Synth home page: http://www.cgs.synth.net/
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
>

Re: Prototype breadboard?

2005-10-18 by brownchonald

A bench power supply would be nice. Hrmmmm... Do you recommend a
+/-15V bench PSU?

I would rather do it this way, because it's a lot less money. But
those powered breadboards are nice because I don't know how to connect
a bench PSU to a plain breadboard.

I'll check some things out. I'm pretty excited!

Another note: do any of you know where to find some simple modular
synthesizer circuits that would fit on a breadboard easily?

Cole
Show quoted textHide quoted text
--- In cgs_synth@yahoogroups.com, "Adam Schabtach" <adam@s...> wrote:
>
> You can obtain just the breadboard itself for a lot less money, and you
> could either use your modular's power supply or buy/build a bench
supply.
> Total cost would still be less than that package. You won't need
both +/-12
> and +/-15V supplies (one or the other--probably 15 if you're using MOTM
> which I believe you are), you may not need +5, and you probably
won't need
> the digital I/O stuff. The function generator would be handy now and
then,
> but not essential. So in other words, buying that package means spending
> money on stuff you aren't likely to use.
>
> --Adam
>
> > -----Original Message-----
> > From: brownchonald [mailto:chonald@g...]
> > Sent: Monday, October 17, 2005 7:37 PM
> > To: cgs_synth@yahoogroups.com
> > Subject: [cgs_synth] Prototype breadboard?
> >
> > Hello,
> >
> > Do you guys recommend a prototyping breadboard? Solderless and
> > powered, to build some of the module circuits that are online.
> >
> > I've been looking at this:
> > http://www.elexp.com/tst_234.htm
> >
> > but not sure if I need all those knobs and switches.
> >
> > Thhanks,
> > Cole
> >
> >
> >
> >
> >
> >
> > The CGS Modular Synth home page: http://www.cgs.synth.net/
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
> >
>

Re: Prototype breadboard?

2005-10-18 by ryan williams

For a solderless breadboard. there are some that have bannana jacks. I'm
using this board: mouser# 383-K242
atleast, i'm pretty sure thats the one. it's PSP brand. $22.75. To power
this board, I connect it to my modular synth's power supply. I have a
+-15V in there and a power distribution board that has the 0.156"
headers (like MOTM). I made a cable that has 4 banana plugs on one end
and a 4-pin 0.156" connector on the other. this power's my breadboard.
if you had a bench PSU, then you don't even need to make that special
cable because they usually have banana jacks on them.

if you really want to be cheap. there are supplies like this:
http://www.mpja.com/productview.asp?product=15695+PS
A 400ma linear +-15V supply. but if you are new to electronics, this can
be pretty dangerous to wire up. So, if that is you, I cannot reccomend
it. Ok, so if you are unsure about this, take that comment very
seriously, but I had successfully wired my own PSU to the wall very
early on in my synth building.

you might be able to find an already enclosed power supply. a linear
+-15V would be nice. 400mA is probably the minimum. That is low for a
modular, but plenty for testing individual, or even a few modules. this
would probably be cheaper than a bench supply.

the board you mentioned is pretty neat. but I agree with Adam, I don't
think you will use much of it too often. For function generators, you'll
probably have a VCO anyway.

I do like the idea of having a complete development platform for synths.
I always imagined building a special breadboard that had pots and jacks
built on so that I could test modules quickly. I have not gotten around
to making something like this yet.

-ryan williams

brownchonald wrote:
Show quoted textHide quoted text
> A bench power supply would be nice. Hrmmmm... Do you recommend a
> +/-15V bench PSU?
>
> I would rather do it this way, because it's a lot less money. But
> those powered breadboards are nice because I don't know how to connect
> a bench PSU to a plain breadboard.
>
> I'll check some things out. I'm pretty excited!
>
> Another note: do any of you know where to find some simple modular
> synthesizer circuits that would fit on a breadboard easily?
>
> Cole

Re: Prototype breadboard?

2005-10-18 by ryan williams

hi again,

another option reccently posted to the synth diy list. it is a home made
bench PSU with several outputs:
http://burnit.co.uk/sdiy/index.php?page=benchpsu

brownchonald wrote:
Show quoted textHide quoted text
> Another note: do any of you know where to find some simple modular
> synthesizer circuits that would fit on a breadboard easily?
>
> Cole

forgot this last part,

many of Ken's designs would fit on a breadboard, some easier than
others. I have built the digital noise circuit on a breadboard without
much trouble.

depending on what you have and what you need, the answer would be
different. I like to reccommend Rene Schmitz VCO 4069 as a starting
point. it's very simple and works pretty well. don't expect MOTM
performance though. I have built it on a breadboard, and then a modified
version is now in my modular. also, his ms20 filter is easily small
enough for a breadboard and I've heard good things about it.
http://www.uni-bonn.de/~uzs159/

Ray Wilson has several circuits. some could be built on a breadboard
easily. look under 'synth-diy'
http://www.musicfromouterspace.com

-ryan

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