[sdiy] Power supply for custom Eurorack case

[ColinMuirDorward]

Neil, I think it's a shipping cost thing, because of the heavy
transformers.
Speaking from personal experience, by the time I calculate the exchange
from CAD to USD, on top of the shipping, I'm usually pretty discouraged.
The other problem I find with the ready-made linear supplies is they tend
to come in really awkward packaging. By the time I go through the hassle of
installing it in a rack enclosure, I should have just built something from
locally salvaged transformers.
This is my current solution, along with the 317/337 kits from ebay.
Cheers,
Colin

On Tue, Jan 28, 2020 at 5:23 PM Neil Johnson <neil.johnson71 at gmail.com>
wrote:

> Why not use a ready-made linear power supply....?
> Genuinely curious.
>
> Neil
>
> On Tue, 28 Jan 2020 at 22:05, Matti Palm <matti.palm at gmail.com> wrote:
> >
> > Tried to post a too large image last time for the list. Sorry if this is
> a double post:
> >
> > I'll upload the BOM. You can also open it in KiCad.
> > A couple of things you may or may not like:
> > - The heatsinks are put on the outside and fastened in the case
> separately.
> > - The ground plane and power traces are pretty good at sucking out the
> heat when soldering. Crank up the temp.
> > - Be careful with the mains. I used an aluminum box where I attach the
> ground wire and a double fused switch, so I don't drop a screwdriver on the
> high voltage stuff. Also used a lot of heat shrink there.
> >
> > /matti
> >
> > On Tue, Jan 28, 2020 at 9:19 PM Didier Leplae <didierleplae at yahoo.com>
> wrote:
> >>
> >> I'm gonna go ahead and order some of these PCBs that you sent Matti.
> Thanks!
> >> I may or may not use the PSUs but for $2 I can order 5 of them, so why
> not?
> >> Is there a BOM with these?
> >>
> >> On Tuesday, January 28, 2020, 02:48:03 AM EST, Matti Palm <
> matti.palm at gmail.com> wrote:
> >>
> >>
> >> I made bus boards that I am happy with:
> https://github.com/mattip123/Eurorack-Bus-board
> >> And also a simple linear PSU with LM317/LM337 that I find low noise:
> https://github.com/mattip123/PSU-Matti
> >> Maybe it can be of help if you use KiCad and want a starting point.
> >>
> >> /matti
> >>
> >> On Tue, Jan 28, 2020 at 8:12 AM Brian Willoughby <
> brianw at audiobanshee.com> wrote:
> >>
> >> If you’re going to the trouble of making custom bus boards, why not
> just put a few extra parts on there and make a power supply? Grab a book
> that covers audio power supplies.
> >>
> >> Lately, I’ve been favoring external wall warts that output AC instead
> of the typical DC. I then use the simply two-conductor barrel connector to
> feed a bog standard linear regulator. If you need multiple voltages, pull
> them all off the same leg.
> >>
> >>
> >> I just bought a 7U by 104HP case myself, so I’m just getting started
> designing my own 1U modules. I’m still new myself, but it seems that 1U is
> typically 5V-powered, and intellijel seem to have simpler 2-wire 5V supply
> cables and connectors for the same on their power supplies. Then again, I
> may be missing something.
> >>
> >> Brian
> >>
> >>
> >> On Jan 27, 2020, at 9:51 PM, Didier Leplae via Synth-diy <
> synth-diy at synth-diy.org> wrote:
> >> >
> >> >> How are you handling distribution?
> >> >
> >> > I was considering making some custom bus boards as well, just to save
> $$.
> >>
> >>
> >> On Mon, Jan 27, 2020 at 10:28 PM Didier Leplae via Synth-diy <
> synth-diy at synth-diy.org> wrote:
> >> > I hope this question hasn't been covered ad nauseam in the past but
> here goes...
> >> >
> >> > I built a custom case for Eurorack that is 84 hp wide.
> >> > It has 7 "normal" rows plus a 1u row. (I guess that makes a total of
> 672 hp)
> >> >
> >> > I have roughly figured I will need a power supply with @ 3A for +12V
> and 2A for -12V. (The 5V seems to be hardly used and yet the power supplies
> I've looked at have an overabundance, probably 1A would be plenty )
> >>
> >>
> >>
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