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Printing a handheld PC

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ArchiMark Page Icon Posted 2020-07-25 6:25 PM
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Excellent, Roberto!

Armbian is very good for these little guys....

I used it on the Banana Pi UMPC I had....worked quite well.

Thanks for sharing.

Mark
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robertojones Page Icon Posted 2020-07-30 9:42 AM
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ArchiMark - 2020-07-25 6:25 PM

Excellent, Roberto!

Armbian is very good for these little guys....

I used it on the Banana Pi UMPC I had....worked quite well.

Thanks for sharing.

Mark


I'm liking Armbian more the longer I use it - pretty impressive effort supporting all these different SBCs too - mostly with little if any help from the manufacturers.

I've now got my speakers working on my 'HPC' - I've gone for a USB DAC and mini amplifier (trying to keep the analogue wiring as short as possible for noise reasons), and managed to fit them both in the lid section. I had to mod the casing of course so I'll need to go back to the model again. Sound is remarkably clear considering the little 20mm speakers - a little 'tinny' of course but should be adequate for videos and system sounds.

Next up - trackball. Wiring first, then figure out how to speak to the GPIO pins on the Pine64 - I understand it's a little different to the Raspberry Pi.
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Flexin Page Icon Posted 2020-08-03 10:56 AM
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I especially like the extra hinge that lets you change the keyboard angle.
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stingraze Page Icon Posted 2020-08-06 11:20 PM
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This just caught my attention. There's a video of a one with PSION keyboard attached to the Zero Terminal.

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robertojones Page Icon Posted 2020-09-13 8:21 PM
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Another update:

Not the progress I was hoping to report, but it is at least moving again.

I've had quite a frustrating time with the software on the Pine64 board and ultimately come to the conclusion that there is no realistic way for me to use the LCD with the board and use a recent Linux kernel - The most recent one that supports it is a heavily modified 3.10.107, which is 3 years old at this point and two major versions behind the current kernel. I'm not comfortable being stuck with this kernel and no real prospect of this changing in the near future - It seems I should have listened more to my concerns about Pine64 leaving all the software support to the community - No criticism of all the work done by their user community but it's just not the same as support by the manufacturer themselves.

So once again I'm moving forward with a different 'brain' for my HPC - I spent yet more time researching this time and settled on the A64-OLinuXino by Olimex. This board is based on the same AllWinner A64 SoC as the Pine64 and specs are pretty similar but it has a couple of advantages:
- Fully supported by the manufacturer with up-to-date Ubuntu images, including crucially support for the LCD they supply. On Linux kernel 5.8.2 at latest release, but I think it's on a later once since I did an update.
- Smaller - Roughly half the board area on the Pine64 but not missing any of the features I'm interested in.
- The manufacturer supplies and supports larger and smaller LCDs (vs. chosen 7") so potential for other variants of the machine in the future, maybe.

So once again it's back to the (CAD) drawing board - A fair bit of work but a job I'm getting quite familiar with! This time I'm getting all of the internal components / software testing done before I do any detailed design work.

I've taken the opportunity to swap out the cheap tablet keyboard, which I was never very happy with, for the keyboard used in the original Asus Eee PC - Remarkably this keyboard is still available new in large quantities from several suppliers and a seller on Tindie has cleverly made a PCB that connects the keyboard ribbon cable to a Teensy microcontroller to turn it into a USB keyboard. Reviews of the Eee PC at the time mentioned the keyboard favourably and I've found the key feel to be very pleasant, even if it is a little old-fashioned looking as it is not the modern 'chiclet' style. Using the Teensy also makes it fully programmable - Useful for adding extra 'Fn' key combinations. This may all be a bit overkill for this machine, but as the keyboard is most of what makes it more than just a tablet I feel it's worth it.

See below for a photo of all the internals of the latest version - This is the last go I'm having at this so I will fully finish it even if there's something major I'm not happy with. There can't be many more obstacles to hit - surely!




Edited by robertojones 2020-09-13 8:23 PM




(HPC Mk4 Internals.jpg)



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Attachments HPC Mk4 Internals.jpg (85KB - 0 downloads)
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robertojones Page Icon Posted 2020-09-22 11:02 PM
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Mini-update on my project:

Testing has been going well, to the point where I'm ready to put in some serious design time on the casing.

Working so far:
- LCD with every Linux kernel I've tried.
- Eee PC keyboard including Fn-key combinations for brightness, sleep and volume control - Brightness and volume controls even have neat little screen overlays provided by the OS.
- Battery charging and power management, integrated with the OS.
- Suspend (only suspend-to-idle at present, but good enough for now).

I'm running Armbian on it at the moment, it's running quite nicely but I'll continue to experiment.

As I said before this one will get fully finished - I'm taking a more cautious approach over any major design decisions and I'll take a little time to document the design and build process as well.
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stingraze Page Icon Posted 2020-10-09 11:18 AM
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I found a pretty neat Raspberry pi UMPC project you can buy on a website called shapeways.

https://www.shapeways.com/product/VRK2PTNE4/raspberry-umpc-project

I believe you need to get all the parts listed on that site.

Edited by stingraze 2020-10-09 11:19 AM




(raspberrypi-umpc.jpg)



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hpcboy Page Icon Posted 2020-10-09 11:24 AM
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Shapeway often asks for money. Thingiverse is totally free:
https://www.thingiverse.com/search?q=raspberry+pi+laptop&typ...
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stingraze Page Icon Posted 2020-10-17 5:50 AM
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Thought this was cool.

It’s called RasPSION. Seems the hinge is inspired by PSION.
http://fablabsetagaya.com/?p=9033

Make: Japan (more details)
https://makezine.jp/blog/2016/07/raspsion.html


Edited by stingraze 2020-10-17 5:52 AM
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hpcboy Page Icon Posted 2020-10-17 6:15 AM
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Very cool makes indeed. I also found hinges from salvaged/broken laptops super useful for this purpose. The metal industial parts are supposed to work better and be more durable than the plastic prints.

Yesterday I just stared at my old phone (LG Optimus G) and my lonely still boxed Pi4 8GB. They are still working but not the batteries.

And how about those superb touchscreen plus a super tiny touch type keyboard? I got two of this last week for about USD$3 each.


Does this ring a bell to you, HPC fans? It's exactly the same keyboard for those nameless cheapish CE netbooks back in the days.

Back to 3D printing, what's in my mind now is I don't necessarily have to print out everything. Many useful parts can be salvaged from old broken subnotebooks (keyboard, speaker, hinge, screws, even the frames, or the screen if the controller can still be found).

Edited by hpcboy 2020-10-17 6:36 AM
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stingraze Page Icon Posted 2020-10-17 11:46 AM
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That sounds like a good idea.
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ArchiMark Page Icon Posted 2020-10-17 11:05 PM
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stingraze - 2020-10-16 9:50 PM

Thought this was cool.

It’s called RasPSION. Seems the hinge is inspired by PSION.
http://fablabsetagaya.com/?p=9033

Make: Japan (more details)
https://makezine.jp/blog/2016/07/raspsion.html


Very cool designs!

Bit steampunk with all the exposed nuts and bolts....

Thanks for sharing.
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ArchiMark Page Icon Posted 2020-10-17 11:07 PM
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hpcboy - 2020-10-16 10:15 PM

Very cool makes indeed. I also found hinges from salvaged/broken laptops super useful for this purpose. The metal industial parts are supposed to work better and be more durable than the plastic prints.

Yesterday I just stared at my old phone (LG Optimus G) and my lonely still boxed Pi4 8GB. They are still working but not the batteries.

And how about those superb touchscreen plus a super tiny touch type keyboard? I got two of this last week for about USD$3 each.

Does this ring a bell to you, HPC fans? It's exactly the same keyboard for those nameless cheapish CE netbooks back in the days.

Back to 3D printing, what's in my mind now is I don't necessarily have to print out everything. Many useful parts can be salvaged from old broken subnotebooks (keyboard, speaker, hinge, screws, even the frames, or the screen if the controller can still be found).


Excellent!

Thanks for sharing.
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