Stop the sirring noise!

Discussion in 'Pyra News' started by EvilDragon, Feb 3, 2018.

  1. hns

    hns Very Active Member

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    There exist several mobile and touch gui focussed OS from the heritage of OpenMoko & GTA04. For example: Replicant, QtMoko, FSO, SHR and more. They just need a little polishing and some people are keen on doing that provided that they get newer hardware. A Pyra-Phone does not necessarily mean you have to use Pyra-OS on it. They share hardware components and kernel but there will be multiple GUI projects to choose from.
     
  2. linx

    linx Still Fresh

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    I too support this idea. I really liked my OpenMoko and I would like to see another device like it. Too bad it got stolen, still wondering if the thief managed to even make a call...
     
  3. pmprog

    pmprog Advanced Member

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    I presume anything we develop for the Pyra (ie, using the modem and other sensors) would be reusable in the Pyra-Phone? I've struggled to do much development lately and I'm interested in the phone version, but if I can start with the Pyra (when that arrives), that'll make some things easier.

    On the capactive screen, meh, I don't see why that would be a problem, you can still press resistives with your finger, and using larger buttons will cover fat fingers :p
     
  4. rygD

    rygD Nihilistic Mystic

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    This is why the Pyra and Pyra-Phone are great ideas. Is that the name you are thinking of going with? Please keep us updated here if you move forward with it. (I would still love an ebook reader or tablet if that ever becomes feasible. Pyra-Phone will have to be good enough for me for now.) Are you going to use the Pyra battery?
     
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  5. Eight Bit

    Eight Bit Advanced Member

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    I think it could be a problem when a phone is in one's pockets. A capacitive screen wouldn't register touch from non capacitive objects where as a resistive screen would.
    It would need a cover of some sort. I like the e-ink screen idea, and maybe even get rid of the touch screen completely and go for a blackberry form factor with a mousepad thing on the bottom?
     
  6. EvilDragon

    EvilDragon Administrator Staff Member

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    It would. If you're unlucky and the movements inside your pocket cause static electricity, it would react right away.
    That's why you can lock / unlock it.
     
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  7. rygD

    rygD Nihilistic Mystic

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    I would be more concerned about damaging the touch layer of you have anything else in the pocket.

    If he makes a tablet format I will push for e-ink, but since the whole point is to reuse as much of the Pyra as possible, at least for now I am sure he is only looking at using the Pyra screen.

    If there is a touchpad on the bottom, let's take it a bit further and add a keyboard. Oh, and gaming controls!
     
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  8. matzesu

    matzesu Advanced Member

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    Therefore there is the " Submarine Mode" ( i called it so) on the Apple Watch if you wants to use it in Water, the Water can cause some input to the Touchscreen,
    For me, the Pyra Phone may be too bulky, and i have allready the Pyra in my Poket, once the Pyra Phone is a real produkt, but the Idea sounds great :)
     
  9. Djoga'Ro

    Djoga'Ro moonstruck

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    It should be called Phoyna
     
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  10. edgex004

    edgex004 Advanced Member

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    A 9.7" e-ink tablet with backlight, a Wacom digitizer, and Pyra OS would fulfill a long time dream of mine.
     
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  11. Young Ace

    Young Ace Still Fresh

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    >Pyra phone
    All of my yes!

    Maybe it would ship with postmarketOS? And have a huge battery?

    The Neo900's progress is very slow...
     
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  12. levi

    levi Still fresh, damnit!

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    Everything produces heat to some extent. Hot glue, being a modified plastic is unlikely to be a good conductor in the solid phase at least, but I think most capacitors are fairly efficient so they don't have to dissipate much heat. There's no solvent so it's unlikely to shrink over time, I think.

    That said, epoxy formulations are more common in this use case I think. They're mechanically rigid so stop anything moving. But they're also a PITA if you want to probe anything underneath them.
     
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  13. Djhg2000

    Djhg2000 Very Active Member

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    I have been so busy with my studies I totally missed/forgot the schematics. Are the ones attached to this thread the latest public version? I'll have a look and see if I can think of something else to do here, but finding a replacement IC with "better" ripple seems to be a fairly straightforward solution.

    FWIW, I counted just over 5 full waves in 400µs (so 13kHz indeed) and 60mV peak to peak for the AUX channel. 35mV on the USB channels.
     
  14. CommanderB

    CommanderB Member

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    That is a good point! How bulky would the pyra phone be? What kind of form factor have you thought of?

    I think that a Pyra phone would be a great idea, probably even better than the Librem 5, but I would not underestimate the design/form factor challenge. In my opinion this one of the main drawbacks of the GTA0X/ Openmoko.

    Gesendet von meinem SM-N9005 mit Tapatalk
     
  15. Eight Bit

    Eight Bit Advanced Member

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    Then first thing to think about would be what functionality the device would need.
    Would it be more phone or more pocket computer (like Pyra).
    Just a touch interface and minimal hardware buttons so essentially a Pyra cpu board built into a pyra screen or a real phone, a bit thicker with just a hardware numpad and smaller screen?
    Or blackberry style with an all out keyboard? There's many ways to go

    For myself as a future Pyra owner I'd rather see a Pyra companion than the same device- without the keyboard and nubs.
     
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  16. Djhg2000

    Djhg2000 Very Active Member

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    The only thing I've found so far is that LDOIN can be connected through a 4.7µF cap to PGND instead of tied to AUX if we don't want to use the 3v3 LDO (the ENLDO pin is tied to ground, so it's permanently disabled anyway). What we currently have isn't wrong, it's just an optimization. It's mentioned in section 8.3.8 on page 11 in the TPS2505 datasheet. Which capacitor is making the noise? Oh and C601 is 100µF while the datasheet recommends 10µF unless the application requires more, is it a typo or to we really need 100µF?

    Just an idea; does the noise go away if we wire the input to VBATT endpoint instead of VSYS? I mean it's a boost converter and we enable it in software from a GPIO pin anyway... Efficiency will probably suffer a bit when the ports are enabled but it will change operating mode from no switching (essentially passthrough) to fixed 1MHz PWM. I'll leave it up to more competent people to determine if it's a good idea but for a test it would be interesting to see if it has any impact (if C601 is squeaking then it definitely should).
     
  17. levi

    levi Still fresh, damnit!

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    He's said he'll be using the 5" screen from the Pyra, and the same battery. The battery is a little wider than the screen, so the phone will at least have some space above and below the screen, although that's still pretty common for earphone and microphone purposes. I'd expect it to be fairly retro in terms of device thickness though, since it'll need that CPU board and a new mainboard between the battery and the screen - most phones I've seem disassembled have the battery directly behind the screen with the motherboard squeezed in around the battery.
     
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  18. Yorizuka

    Yorizuka Hi, how was your day?

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    A Pyra companion sounds interesting, maybe there should be a Bluetooth companion device for the Pyra down the line!
     
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  19. rygD

    rygD Nihilistic Mystic

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    No, Fyre, because Pyra+Fone. Don't judge me! :p

    I am fine with even a 7 inch screen... Actually I prefer it.

    This isn't for us. It is a Pyra based smartphone, so it gets some of the software and the hardware from Pyra. If anything it expands the community and userbase, and that is why I am totally behind it. If I get anything later, like my tablet, doesn't matter. Once there are PyraPhone users they get to come along for the ride with whatever CPU board we get, which is good for all of us. Some of those users will show up here, and some will give us great things, even if it is just a smile on our faces.

    I thought he said battery. I guess I missed it when going back. If it looks interesting enough, screw Pyra calls, I need a Pyra-Phone. Not sure why I am so excited about it.
     
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  20. Dark Pulse

    Dark Pulse Retreaux

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    Wouldn't "Phyre" be better, since it actually has the letters for "phone" in it?
     

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