BATTERY for SatelliteCCRMA, and to power a small 1A speaker amp.

[Levy Lorenzo]

hi group -

has anyone found a good battery to power both the SatCCRMA and a small amp for audio?  

looking to power a standalone mini system with a  single battery.

thanks!

levy

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www.levylorenzo.com

[Edgar]

Hi Levy,

I personally like these:
http://www.parts-express.com/dayton-audio-dta-2-class-t-digital-audio-amplifier-module--300-385
paired with 4 ohm speakers

You will maybe need a ground loop isolating cable like this one:
http://www.amazon.com/Metra-Electronics-AGL3-5-GROUND-ISOLATE/dp/B0049MWYOK/ref=sr_1_13?ie=UTF8&qid=1443625829&sr=8-13&keywords=isolator+cable+ground+loop
(I haven't tried that one though so I can't vouch for it—the ones I ordered aren't available anymore)

I used this battery successfully:
http://www.ebay.com/itm/like/151773577277?ul_noapp=true&chn=ps&lpid=82
At least I think that's the same one. It's not available on Amazon anymore where I got it.

I never had to do this:
http://www.dorkbotpdx.org/blog/paul/battery_pack_load
but I know that depending on which battery you use, you might have to do that.

And then step down the 12V to 5V for the raspberry pi:
http://www.amazon.com/Autek-Converter-convert-adapter-DCCON-5U-0/dp/B00BMIVFK8/ref=sr_1_2?ie=UTF8&qid=1443626231&sr=8-2&keywords=12v+to+5v+adapter

But there are other ways! If you don't need as much power, you can find a solution that runs off of only 5V, but there are fewer options because car audio is 12V.

This was the strategy used in:
https://nime2015.lsu.edu/proceedings/337/0337-paper.pdf

Best,
Edgar

[JohnOButtons]

I've used rechargable Li battery type 18650.

You could use two of them giving you 7.4 volts and regulate it down to 5.

John

[Edgar J. Berdahl]

If you ever try this, I highly recommend using a switching-type voltage regulator. My experience with linear regulators is that they tend to get really, really hot!

Best!

—Edgar

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