[sdiy] Battery power for eurorack

[cheater cheater]

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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