[Noisebridge-discuss] portable power/battery question

[Lee Sonko]

Take a look at how we calculated a battery budget on SWARM
http://wiki.orbswarm.com/index.php?title=Power

Short form:
Calculated a power budget. Strung together some used sealed lead acid
batteries (look in the Suppliers
page<http://wiki.orbswarm.com/index.php?title=Suppliers>for some cheap
ones), charge them with a car charger. Profit!

You'll get 20% longer run-times if you use all DC components instead of
using an inverter. But it's sooo much easier to use an inverter, do that
first!

If you've got too much money, use lithium batteries instead and the rig
will be lighter. Sorry, I can't help with pricing out that system.

Tell me how it goes!



On Fri, Jun 1, 2012 at 8:59 AM, Lewis Scaife <lewis.scaife at gmail.com> wrote:

> Howdy. First post to this mailing list. Thank you for existing.
>
> i am attempting to put together gear for portable electronic music
> performance, probably set up on a bike trailer.
> i will be using an arduino-based infrared gestural midi controller called
> Hollowbook - i've demoed it at Noisebridge a couple of times, you can check
> it out here: http://youtu.be/2OmqivEHpC8
>
> My electrical knowledge is limited. my goal is purchase a durable and
> lasting portable power system for the following items:
>
> 40w 19v DC 2.1A power adapter for Asus ul20a laptop
> 9v AC 1A adapter for m-audio quattro
> 7.5w 9v DC 500mA adapter for hollowbook (power over usb from laptop is not
> an option)
> POSSIBLY a boom-box style speaker system of modest volume but undetermined
> wattage...
>
> i have been looking into portable power systems such as these<http://www.amazon.com/s/ref=nb_sb_noss_2?url=search-alias%3Dautomotive&field-keywords=portable+power> found
> in a cursory Amazon search. i hoped to get some opinions from more
> experienced people as to what would be a good move. an option which i have
> considered is to purchase a separate battery powered amp to replace the
> speaker system if there would be too much load on a portable power supply
> otherwise. i would hope to be able to perform for at least 2 hours. i'm
> absolutely not looking for loudness - my goal is to fly below the "no
> amplified music" radar and play downtempo, instrumental chillout music with
> an awesome and unique midi controller. Valencia street has a lot of foot
> traffic at night and would be the perfect place to drum up a local fanbase.
>
> Thank you sincerely for your time. i hope my post was in good taste and
> finds you all well.
> best wishes
>
> Lewis
>
> you can hear my music at http://music.ratsofnym.com  ... it's a
> spaghetti-western themed instrumental hip hop album... please let me know
> if you would like to own the album, i'd be happy to give you a free copy of
> either the mp3s or an antiquated compact disquette.
>
> L
>
>
>
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>
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