New Take On Hi-res Portable (and Pi Power)

[chicks]

Pi Zero WH with 1.3" display. A work in progress, using LMSTools python lib. Joystick for <<,>>,Pause/Play,Volume +/-.
Apple USB-C headphone dongle with adapter. Waiting for battery HAT...

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Well, the battery HAT never arrived from China, so went another direction, using a case and battery meant for gamers. Fun little project, if impractical. Haven't tested the battery duration, but expect an hour or two before it has to go back on charge. A magnetic micro-usb charger cable would make it a tiny bit more practical. No output at the moment, just a simple controller. The joystick is pretty nifty to use with the cap on.

https://www.hackster.io/news/the-pinkypi-pushes-the-limits-of-how-small-a-raspberry-pi-handheld-can-be-4580d32008fb

[d6jg]

My latest portable but HiFi quality player.
Pi Zero W with pCP velcroed onto a Getihu power bank with Audioquest Dragonfly. I’ve been using it for about 6 hours so far and it’s used just 4% of the power. Started at 83%.
It fits into a small carry case. The power bank has an on/off switch and 2 USB out with separate USB-C that is both in and out.

No screen required as it’s controlled by my phone. Why not just use the phone? Both iPhone and Android carry compromises.

iOS. iPeng will play 24/96 happily with the Dragonfly attached but you need to use a Lightning to USB adapter. I’ve tried all sorts but the one constant is that they fail after a period of use. They require an Apple authorised chip in the Lightning end and it’s this that is the weak area. Also iPeng doesn’t support crossfade.

Android. Although the Android audio subsystem can handle 24/192 neither of the existing SB player apps seem to be able to use it beyond 16/48. Correct me if I’m wrong.


Sent from my iPhone using Tapatalk

[Man in a van]

Pi Zero WH with 1.3" display. A work in progress, using LMSTools python lib. Joystick for <<,>>,Pause/Play,Volume +/-.
Apple USB-C headphone dongle with adapter. Waiting for battery HAT...

[ATTACH]35590[/ATTACH]

Neat !!

Would it be possible for you to knock up a simple "how-to" when you have time, please.

The Apple dongle is a bargain at £9 delivered, I have a couple, and thanks to paul- they work on pCP

ronnie

[chicks]

Pi Zero WH with 1.3" display. A work in progress, using LMSTools python lib. Joystick for <<,>>,Pause/Play,Volume +/-.
Apple USB-C headphone dongle with adapter. Waiting for battery HAT...

The Khadas Tone Board is an incredibly good DAC for its price but decent cases are difficult to find. The best one I found was Audiophonics

Thanks for the responses on the Khadas Tone Board.

I have other projects on the go at the moment and don't have the time to devote to following this up.

Here is mine sans headphones

Neat. Guess the battery usage is somewhat lower with the Pi Zero W.

May I ask (to anyone doing this):

a) what capacity powerbank (mAh)?
b) roughly what duration of portable playback do you get from a full charge?

Thanks in advance!

I use an Anker 20100 which Amazon say can supply up to 4.8A. It has four blue leds indicating the state of charge. I tend to recharge mine when it gets down to 2 leds showing. Can't say how long it would run till the battery was flat, haven't tried using that way. I did buy my (very short) USB lead from Anker, no use having a cheap, longer than needed USB lead absorbing some of the power.

[Man in a van]

May I ask (to anyone doing this):

a) what capacity powerbank (mAh)?
b) roughly what duration of portable playback do you get from a full charge?

Thanks in advance!

Well, mine are all old Anker units, 10000mAH (max output 3.0 amps).

It has two 5 Volt outputs but the both don't supply 3 amps each

So I would say you want 5 volts at 3 amps through at least one output, as the current draw is often greater at power on.

I have some older ones which allow "pass through" which means they can be charged at the same time they are being used.

Non are modern enought to have "Smart" connections so I don't know if that feature will be a help or hindrance.

Length of use depends on volume and workload put upon the rapberry pi, also the impedance of the headphones. (that's a techie as I get )

Are you near to Dingwall at all ?

ronnie

[mooblie]

Capacity used? Duration of playback?

May I ask (to anyone doing this):

a) what capacity powerbank (mAh)?
b) roughly what duration of portable playback do you get from a full charge?

Thanks in advance!

[d6jg]

Audiophonics case.

Khadas Tone Board sitting on top of Pi4 in Pibox Pro case. The width dimension is the same on both as luck would have it.




Sent from my iPhone using Tapatalk

[Man in a van]

The Khadas Tone Board is an incredibly good DAC for its price but decent cases are difficult to find. The best one I found was Audiophonics

I use one the same as this

https://www.amazon.co.uk/youyeetoo-Khadas-Clear-Acrylic-Board/dp/B07VRS4YDG

I got mine from a dealer on the fishie forum

ronnie

[d6jg]

Ronnie, I had to give up cycling a couple of years ago and my interest in the grand tours has declined I'm afraid but I do like watching the track cycling at the various events. Apparently there are some here in Birmingham next year at the Commonwealth Games. Maybe I'll go to one or two of those. I'm 74 now, I know my hearing isn't what it used to be in frequency terms but the music still sounds great when I've got my headphones on.

You have loads of DAC's and players always wanted to try a Khadas Tone Board but haven't got round to it yet.

Incidentally I noticed I inadvertently referred you to an incorrect link in my last post. The correct link for AKG's etc is:

https://custom-lynx.co.uk/product/custom-lynx-neutrik-female-mini-xlr-to-3-5mm-trs-mini-jack-balanced-silver-plated-cable-black-and-gold-contacts/

Picture of my Pi 4B/IQ Audio Dac+/Samsung SSD/Topping Headphone Amp Server/Player

The Khadas Tone Board is an incredibly good DAC for its price but decent cases are difficult to find. The best one I found was Audiophonics

[Man in a van]

Thelink was OK Ian, I managed to navigate to the AKG page, but thanks for the correct link anyway

Drop me a PM and we can discuss a loan, no problemo

ronnie

Thanks for the link Ian, I meant to ask you when I first saw your original post, but forgot

I also sometimes use my Cyrus Logic "Turtle"

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ronnie

are you watching La Vuelta ?

Ronnie, I had to give up cycling a couple of years ago and my interest in the grand tours has declined I'm afraid but I do like watching the track cycling at the various events. Apparently there are some here in Birmingham next year at the Commonwealth Games. Maybe I'll go to one or two of those. I'm 74 now, I know my hearing isn't what it used to be in frequency terms but the music still sounds great when I've got my headphones on.

You have loads of DAC's and players always wanted to try a Khadas Tone Board but haven't got round to it yet.

Incidentally I noticed I inadvertently referred you to an incorrect link in my last post. The correct link for AKG's etc is:

https://custom-lynx.co.uk/product/custom-lynx-neutrik-female-mini-xlr-to-3-5mm-trs-mini-jack-balanced-silver-plated-cable-black-and-gold-contacts/

Picture of my Pi 4B/IQ Audio Dac+/Samsung SSD/Topping Headphone Amp Server/Player

Need some shorter cables.

I came to the same conclusion when I'd got this working. I bought a short Anker cable from Amazon and also A USB switch after I tried to modify a project box but found the combination of my advanced years and too powerful a soldering iron overwhelmed the tiny switch.