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.
+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 Rid�� <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]