Is it possible to make portable system using HiFiBerry boards?
Portable meaning powered by batteries.
Has anybody tried to use Raspberry Pi Zero:
https://www.adafruit.com/products/2885
with HiFiBerry boards? Is it possible to make portable audio
system using that Pi Zero and HiFiBerry?
It would be interesting to see high quality DAC+Headphone Amp
designed for Pi Zero. That would probably allow to make your
own pocket player based either on mpd or mplayer. Or something
like this:
http://www.amazon.com/Sony-PHA3-PHA-3-Headphone-Black/dp/B00OH82RXO?ie=UTF8&keywords=Sony%20PHA-3&qid=1463604147&ref_=sr_1_1&sr=8-1
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2 comments
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HiFiBerry team Hi,
in general the boards work with the Pi Zero. However even the Raspberry Pi Zero's power consumption is quite high. The CPU isn't really designed for portable devices. Therefore don't expect a long operating time with a small battery.Best regards,
Daniel -
hifi I've found this page with Pi Zero consumption
http://www.jeffgeerling.com/blogs/jeff-geerling/raspberry-pi-zero-power
So if I'll use 5000mAh battery it should last about 40 hours. Bigger battery more hours.
The main consumption of such system will be in amplification stage. For example
to have 5W from speakers with 12V amplifier you need about 500mA (assuming 100% efficient
amp which is usually not the case). So Pi Zero plus amplifier: 120mA + 500mA = 620mA.
Such system will work about 8 hours. Minus amp inefficiency gives about 6 hours. With
much bigger 10000mAh battery ~16 hours. This is theoretical number but it looks not so bad.
Another point is voltage convertion from 5V to 12V. That consumption - 500ma is for 12V.
If you use 5V battery and bump up module that makes about 1A for 5V.
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