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We've started to order things!

Discussion in 'Pyra News' started by EvilDragon, Feb 16, 2017 at 1:54 AM.

  1. hns

    hns Active Member

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    Oberhaching
    and the sound chip.
    Mainboard has WiFi, 4G, antennas, charger, sensors, nubs, keyboard, buttons, rumble motor, LEDs, SD slots, volume wheel, connection to speakers and battery, external connectors.
     
    AVahne, Alberto and ClockworkCoder like this.
  2. Bokkertoff

    Bokkertoff Still Fresh

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    Oct 28, 2016
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    5
    Hi all,

    Is there any chance to replace the USB 3 connector with a USB Type-C connector ?

    upload_2017-2-17_12-19-6.png

    I have several external hard drives that have this type of connector and it is very fiddly on all of them. It seems to wear out very easily and then its becomes fiddly to get a good contact.
    USB type-C seems to address this issue.
     
  3. Letalis Sonus

    Letalis Sonus Very Active Member

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    779
    Type-C requires a lot more than just exchanging the socket, because it introduced a lot of new features. The new alternate modes and the fact that it can be used upside down require a more complex wiring and you'll likely won't get around adding another IC, there's just no room to do that. There's a reason why one of the ICs near the backside uses a weird angle on the PCB (aka "wonky chip").
     
  4. m@t

    m@t Still Fresh

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    @EvilDragon: Thanks a lot!
    @kahn, bubblebee, ible, AAVahne, FaeMinx: ***!
     
  5. okpyra429

    okpyra429 Still Fresh

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    Brilliant. Thank you. There are no dramatic differences between 3.8 and 4 afaik.



    Sent from my iPhone using Tapatalk
     
  6. CrazyIvan

    CrazyIvan Member

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    No headphone amp then? This sucks.
     
  7. TrashyMG

    TrashyMG Moderator Staff Member

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    The twl6040 chip handles headphone amplification.
     
    Link likes this.
  8. AVahne

    AVahne Handheld-obsessed

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    Wrath Of Khan likes this.
  9. directive0

    directive0 Very Active Member

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    At this point I think any kind of hardware change or substitution -barring a real technical error or some kind of problem- is unrealistic. 'We're' nearing the final board layout for production aren't 'we'? It would be a bad time to start adding or removing features IMO.
     
  10. mecksg1

    mecksg1 Member

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    ok now i just wait till the auction of the prototypes and im a happy camper
     
    rygD and ClockworkCoder like this.
  11. CrazyIvan

    CrazyIvan Member

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    Of course it does, almost every other DAC does the same. It provides typical smartphone power level which is good for typical 16-20 Ohm headphones.
    Additional amplification is needed for higher impedance headphones and quality headphones are usually in that category.
     
  12. mecksg1

    mecksg1 Member

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    maybe when they do the 1st board upgrade when the pyra takes off they will look that. i also would love the usb-c also, but i can wait for it
     
  13. TrashyMG

    TrashyMG Moderator Staff Member

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    Actually looking at the specs of the headphone amplifier in the Pandora vs the Pyra they're practically the same in terms of driving capabilities.

    Pandora - http://www.ti.com/lit/ds/symlink/tpa6110a2.pdf
    Pyra - http://www.ti.com/lit/ds/symlink/twl6040.pdf
     
  14. Svekkus

    Svekkus Still Fresh

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    Yes but those mainly use the big jacks unlike 'smartphone headphones', so you cant insert those anyway. Convertors are available but imo the soundquality that is produced with or wihout amp won't really be up to par for quality headphones.
     
  15. Grench

    Grench Hardcore Member

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    Maybe I'm not interpreting it right, but from what I see there:
    6110a2 is 150mW stereo. i.e. 75mW per channel.
    6040 is 1.5W per channel

    So is the 6040 a 20X more powerful amp, or what am I interpreting wrong?

    Edit: To double audio volume requires 10X more amplification. So, one would not be 20X louder than the other, more like double and a bit louder. Overall volume does not denote quality, but more powerful amplification tends to maintain the cross frequency sound load with fewer artifacts or distortions.
     
    Last edited: Feb 17, 2017 at 5:18 PM
    lukey likes this.
  16. slaeshjag

    slaeshjag Advanced Member

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    The 1.5 Watt rating is for the speaker out. No sane amplifier would ever pump 1.5 Watt into ordinary headphones.
     
  17. zmatt

    zmatt Member

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    Yo Tony! What brought you here?

    It does run in LPAE, but with 2GB still so far. The other half is still having a bit of a fight with the init since it's dual-rank, so not much examples around, and the ram init code in u-boot is... not very transparent, especially since TI is using undocumented PHY registers there I haven't actually even managed to find yet where it's setting certain registers, but when I inspected them they turned out to contain nonsentical values for the second rank.

    Note that the sort of situation the kernel gets (with a large part not accessible by other initiators) can of course already be tested with 2GB ram: just tell the kernel it has two ranges:
    • 0'800'00'000 - 0'BFF'FF'FFF (1 GB)
    • 2'C00'00'000 - 2'FFF'FF'FFF (1 GB)
     
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  18. Swordfish II

    Swordfish II Active Member

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    If he has preordered maybe his preorder should be cancelled to prevent all this stress he has.
     
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  19. CrazyIvan

    CrazyIvan Member

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    Well, twl6040 spec isn't as detailed but if 'capability' really means the ability to provide such power for long term usage then yes, they're somewhat close.
    The problem is that twl6040 was used in Galaxy Nexus and that phone didn't look like a great headphone driver.

    There are lots of cans around 100 Ohm with the usual 3.5 mm jack. Just look at the 'better than average' category.
     
  20. vcoleiro1

    vcoleiro1 Advanced Member

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    I'm still concerned at how close the bottom of the dpad and the X button are to the keyboard keys. I have large thumbs, I can see myself accidentally hitting a key when going for d-pad down or the X button.
    I know ED said this was a real issue when doing early tests and was looking to address the issue. I think ED said he was adjusting the height of the keys/ buttons to address it. I'm wondering if there still is an issue there?


    1. [​IMG]
     
    FBnil, Kippykip, rygD and 1 other person like this.

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