[Noisebridge-discuss] portable power/battery question

[Rrmutt]

Any of those would likely work. 

Another option is to roll your own with one or more 12v gel-cell batteries, a charger for same, and an inexpensive inverter for the laptop. This has the advantage that it's likely cheaper, you can lug the charger around separately, and maybe even swap in another set of charged batteries during a performance if you need them. 

You can get 12v computer speakers for super cheap, they are sometimes even e-waste. I would bet that the m-audio has internal rectification and regulation so it too could run on 12v DC straight from the batteries. Probably the hollow book too, use a dc-dc to get a nice clean 5vdc if that's what it takes. 

HTH


On 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 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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