[sdiy] Battery power for eurorack

[Quincas Moreira]

Chromatest, since my PSUs are hybrid, there is no conversion needed. The
cases themselves use switchers, caps and regulators to generate the clean
modular voltages, all they ask for is about 12v DC, which you can get from
any Laptop PSU or battery.  Just plug and play.  In particular I use the
battery with my Erica Synths Travel case, and my small DIY case which uses
the Befaco Lunch Bus power system, but with the beefier Meanwell DC
DC brick as found in their Excalibus board.
The battery lasts well over an hour with the big 104hp 12U case, and up to
three on the little blue one. I also use it with my LXR-02 drum machine
which is fun to carry around the house :)

Quincas

On Fri, Dec 31, 2021 at 1:58 PM Chromatest J. Pantsmaker <
chromatest at azburners.org> wrote:

> I clicked on that link and saw the price!  What kind of battery is
> this?????
> Then I changed the domain to .com
> https://www.amazon.com/gp/product/B00ME3ZH7C
>
> Quincas, what do you use to convert that battery to your module voltages?
>
> On Thu, Dec 30, 2021 at 9:21 PM Quincas Moreira via Synth-diy <
> synth-diy at synth-diy.org> wrote:
>
>> I use this battery on any of my cases with great results! Of course my
>> cases no longer use linear supplies, those require bipolar power and waste
>> tons of current. DCDC converters for the win!
>>
>> https://www.amazon.com.mx/gp/product/B00ME3ZH7C/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1
>>
>>
>> On Thu, Dec 30, 2021 at 9:07 PM cheater cheater via Synth-diy <
>> synth-diy at synth-diy.org> wrote:
>>
>>> If you want really very clean power, use a full-sine UPS to power a
>>> toroid based power supply.
>>>
>>> On Fri, Dec 31, 2021 at 2:42 AM Didier Leplae via Synth-diy
>>> <synth-diy at synth-diy.org> wrote:
>>> >
>>> > Thanks. I think these last two responses put this idea to rest for me,
>>> as my main objective was cleaner power.
>>> >
>>> > On Dec 22, 2021, at 10:54 PM, Chromatest J. Pantsmaker <
>>> chromatest at azburners.org> wrote:
>>> >
>>> > 
>>> > I've seen people create DC-DC supplies taking power from 5V battery
>>> banks (for charging your phone, etc.) and running entire live rigs from
>>> that.
>>> >
>>> > I think having a single easily swappable battery would be better than
>>> having one for each voltage.  You can then possibly just plug your DC-DC
>>> supply into a large amperage 5V wall-wart.
>>> >
>>> > On Wed, Dec 22, 2021 at 2:38 PM Oren Leavitt via Synth-diy <
>>> synth-diy at synth-diy.org> wrote:
>>> >>
>>> >> I've seen people use batteries to power small modular synths.
>>> >>
>>> >> Several years ago I've ran a small synth with 10 low current analog
>>> >> modules plus an analog keyboard interface directly from two 12 volt
>>> >> DeWalt cordless drill battery packs one each for the V+ and V- rails.
>>> >> After playing on it for a few hours the V+ battery was at about 80%
>>> >> charge and the V- battery was still at full charge. This was an NiMH
>>> >> battery pack. I forget what the mAH rating was..
>>> >>
>>> >> - Oren
>>> >>
>>> >> On 12/22/21 2:41 PM, Didier Leplae via Synth-diy wrote:
>>> >> > I’m curious about the idea of using batteries for eurorack power. I
>>> am not an electrical engineer, so correct me if I’m wrong in thinking that
>>> battery power could potentially be very clean compared with the cheap power
>>> supplies many of us use.
>>> >> > Plus, of course the portability would be another great benefit.
>>> >> >
>>> >> > Given recent advances in rechargeable battery technology, I wonder
>>> if it could be practical and not terribly expensive.
>>> >> >
>>> >> >   I’m assuming you might need two or even three separate batteries
>>> to get the +12 , -12 and +5 volt supplies.
>>> >> >
>>> >> > Perhaps someone has done this that I’m not aware of.
>>> >> >
>>> >> >
>>> >> >
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>>
>>
>> --
>> [image: QMA]
>>
>> Quincas Moreira
>> Director | QMA
>> mobile:  5534988825
>> site:  quincasmoreira.com
>> email:  quincas at gmail.com
>>
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>

-- 
[image: QMA]

Quincas Moreira
Director | QMA
mobile:  5534988825
site:  quincasmoreira.com
email:  quincas at gmail.com
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