Thanks Dave and Ken for those informations.
I've almost got idea of how to make it.
Cheers
I've almost got idea of how to make it.
Cheers
--- In cgs_synth@yahoogroups.com, Dave Kendall <davekendall@...> wrote:
>
> Yes - 7912 for (-) negative voltages. The 7912 needs a minimum load to
> function correctly. An LED with series resistor should do the trick.
> Might as well add one to the (+) regulator (7812) too - you then have
> a pair of status LEDs almost for free :-)
>
>
> cheers,
> Dave
>
> On 3 Oct 2012, at 10:06, fuyuhiko wrote:
>
> > Thanks for all kind advices.
> >
> > I'm thinking to buy a power supply which produces +/-15V capable of
> > 0.8A per rail, literally Power One HAA15-0.8-AG, then add 7812 and
> > 7912 accordingly. Should I use the 7912 for the negative supply
> > Shouldn't I?
> >
> > I can't calculate how much current the circuits consume from the
> > schematics as I'm quite a beginner.
> > All I can do is building the modules one by one and measure the
> > current with multimeter. Though I guess there won't be so much current
> > running as most of them use only one or two ICs such as 555timer. A
> > LFO I will build uses five TL082s and two LM13700.
> >
> > Let me know if I might have a problem.
> > Thank you very much anyway.
> >
> > --- In cgs_synth@yahoogroups.com, Richarius Molindarius
> > <richmolindarius@> wrote:
> > >
> > > Also - if possible, find out just how much current will be drawn
> > from the
> > > +V and -V sides of the power supply. THEN get 12 volt regulators
> > that are
> > > rated for a fair bit higher than that amount.
> > > I don't know the general rule for heatsinks on voltage regulators
> > but I do
> > > believe it safe to say that if you're going to be drawing more than
> > 0.5
> > > amps from each of them, they should have heat sinks attached to
> > them as
> > > well. The heat sinks help to disperse the heat from the voltage
> > regulators.
> > >
> > > On Tue, Oct 2, 2012 at 6:48 PM, <sasami@> wrote:
> > >
> > > > **
> > > >
> > > >
> > > > Yes, there is a problem doing that. Resistors control current,
> > not voltage.
> > > > You could add a 7812 and a 7912 regulator from the output of the
> > +/-15 to
> > > > give you +/-12V
> > > >
> > > > Ken
> > > >
> > > > >Hi there. I've just wondered if there is any problem that making
> > a +/-12V
> > > > from a +/-15V power supply by simply inserting some registers, I
> > want to
> > > > use
> > > > both voltages so that I can mix some modules which I've taken
> > from several
> > > > designers.
> > > > >
> > > > >Kind Regards
> > > > >
> > > > >--- In cgs_synth@yahoogroups.com, "fuyuhiko" <hiko_goldenballs@>
> > > > wrote:
> > > > >>
> > > > >> Thanks Dave for the information.
> > > > >> I will plan what exactly I want to build.
> > > > >>
> > > > >> Cheers
> > > > >>
> > > > >> --- In cgs_synth@yahoogroups.com, Dave Kendall <davekendall@>
> > wrote:
> > > > >> >
> > > > >> > MOTM used to make a PSU complete with front panel as a kit,
> > (MOTM
> > > > 900)
> > > > >> > using a power one HBB15. (0.8A per rail)
> > > > >> > Not sure if it is still being sold, but power-one's are dead
> > easy to
> > > > >> > wire up - basically just mains wire, socket and fusing, and
> > then run
> > > > >> > the ±15V to the distro board of your choice :-)
> > > > >> >
> > > > >> > Google should show up plenty of info on how to do it.
> > > > >> >
> > > > >> > cheers,
> > > > >> > Dave
> > > > >> >
> > > > >> > On 19 Sep 2012, at 13:16, fuyuhiko wrote:
> > > > >> >
> > > > >> > > Thank you for the reply. Is the Power-one used for each
> > > > synthesizers
> > > > >> > > by encasing with circuits or does anyone make a power
> > supply with
> > > > it?
> > > > >> > >
> > > > >> > > --- In cgs_synth@yahoogroups.com, "goldencardigan"
> > <dean.lowe@>
> > > > >> > > wrote:
> > > > >> > > >
> > > > >> > > > Also keep an eye on ebay for power-one or condor brand
> > linear
> > > > power
> > > > >> > > supplies. Lots of DIY'ers use them. You will spot one or
> > two hiding
> > > > in
> > > > >> > > back of Fonitroniks racks on his website. You can find
> > them in lots
> > > > of
> > > > >> > > different volatges and up to 1.5amps. Reasonably easy to
> > wire up.
> > > > >> > > >
> > > > >> > > > --- In cgs_synth@yahoogroups.com, "fuyuhiko"
> > <hiko_goldenballs@>
> > > > >> > > wrote:
> > > > >> > > > >
> > > > >> > > > > Thanks for all generous replies, it's very helpful and
> > I've
> > > > been
> > > > >> > > relieved.
> > > > >> > > > >
> > > > >> > > > > The linear power supply seems not bad, but can be
> > confusing as
> > > > >> > > Ove said.
> > > > >> > > > > I will consider buying either Doepfer one or
> > customizing the
> > > > >> > > linear power supply to be easily used.
> > > > >> > > > >
> > > > >> > > > > Thank you very much and good luck for your inventions.
> > > > >> > > > >
> > > > >> > > > >
> > > > >> > > > >
> > > > >> > > > > --- In cgs_synth@yahoogroups.com, "roglok" <roglok@>
> > wrote:
> > > > >> > > > > >
> > > > >> > > > > > These seem to be quite popular too:
> > > > >> > > > > >
> > > > >> > > > > > http://www.tiptopaudio.com/zeuspwr.php
> > > > >> > > > > >
> > > > >> > > > > > although, like the Doepfer, they provide only
> > +/-12V...
> > > > >> > > > > >
> > > > >> > > > > > Here's an example for a pre-built 15V PSU, but be
> > aware that
> > > > it
> > > > >> > > only delivers 500mA:
> > > > >> > > > > >
> > > > >> > > > > > http://www.blacet.com/misc.html
> > > > >> > > > > >
> > > > >> > > > > > --- In cgs_synth@yahoogroups.com, Ove Ridé
> > <nitro2k01@>
> > > > wrote:
> > > > >> > > > > > >
> > > > >> > > > > > > On 15 September 2012 23:09, fuyuhiko
> > <hiko_goldenballs@>
> > > > >> > > wrote:
> > > > >> > > > > > > > Hello there.
> > > > >> > > > > > > >
> > > > >> > > > > > > > This is totally newbee question. I'm thinking of
> > buying a
> > > > >> > > linear power
> > > > >> > > > > > > > supply to get DC +/-15V as building a power
> > supply seems
> > > > >> > > difficult for me.
> > > > >> > > > > > > >
> > > > >> > > > > > > > For instance;
> > > > >> > > > > > > >
> > > > >> > > > > > > >
> > > > >> > >
> > > >
> > http://www.conrad-uk.com/ce/en/product/511815/VOLTCRAFT-VLP-2403-240W-
> > > > >> > > DC-Power-Supply-Linear/2110330&ref=list
> > > > >> > > > > > > >
> > > > >> > > > > > > > But Im not sure if using this type of supply is
> > efficient
> > > > >> > > for the future
> > > > >> > > > > > > > use.
> > > > >> > > > > > > > Is there any drawback of using this type of
> > power supply?
> > > > >> > > > > > > >
> > > > >> > > > > > > > Please let me know if you have any opinions.
> > > > >> > > > > > > > I live in the UK.
> > > > >> > > > > > >
> > > > >> > > > > > > Hello. That's a lab power supply. If you intend to
> > do any
> > > > >> > > kind of
> > > > >> > > > > > > eletronical prototyping work, you should have one.
> > You
> > > > won't
> > > > >> > > regret
> > > > >> > > > > > > getting it. I am not familiar with the quality of
> > that
> > > > brand,
> > > > >> > > but the
> > > > >> > > > > > > specs look ok.
> > > > >> > > > > > >
> > > > >> > > > > > > However, It would be a bit inconvenient to power a
> > synth
> > > > >> > > system from a
> > > > >> > > > > > > lab power supply. You need to plug in cables for
> > every time
> > > > >> > > you want
> > > > >> > > > > > > to use it, and not confuse the + and - cables,
> > etc. For
> > > > daily
> > > > >> > > use, I
> > > > >> > > > > > > would probably recommend something like the
> > Doepfer A100
> > > > kit.
> > > > >> > > > > > >
> > > > >> > > > > > > http://www.doepfer.de/a100_DIY_kits.htm
> > > > >> > > > > > >
> > > > >> > > > > > > --
> > > > >> > > > > > > /Ove
> > > > >> > > > > > >
> > > > >> > > > > > > Blog: <http://blog.gg8.se/>
> > > > >> > > > > > >
> > > > >> > > > > > > "Here is Evergreen City. Evergreen�¿ is the
> > color of
> > > > >> > > green forever."
> > > > >> > > > > > >
> > > > >> > > > > >
> > > > >> > > > >
> > > > >> > > >
> > > > >> > >
> > > > >> > >
> > > > >> > >
> > > > >> >
> > > > >>
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >------------------------------------
> > > > >
> > > > >The CGS Modular Synth home page: http://www.cgs.synth.net/
> > > > >Yahoo! Groups Links
> > > > >
> > > > >
> > > > >
> > > > >
> > > > __________________________________________________________
> > > > Ken Stone sasami@ otherunicorn@
> > > > Modular Synth PCBs for sale <http://www.cgs.synth.net/>
> > > > Australian Miniature Horses & Ponies
> > <http://www.blaze.net.au/~sasami/>
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > > --
> > > Take care,
> > > Warmth and Peace,
> > > Rich
> > >
> > > http://www.damian.deathlehem.com/ - my modular synth
> > > http://www.soundcloud.com/Richarius - my latest composition snippets
> > > http://www.youtube.com/dolphinicus/ - various module videos of mine
> > / etc.
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
> >
> >
>