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Just a bunch of pics

Discussion in 'Pyra News' started by EvilDragon, Feb 11, 2018.

  1. Azure

    Azure Trust the recursion...

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    From the datasheet it sounds like the new chip uses PFM to maintain light-load efficiency, so isn't there a concern that we'll get sub-harmonics that will still cause audible noise? From the datasheet:
     
  2. Silent-Hunter

    Silent-Hunter Advanced Member

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    No, I was thinking about early decimal computers.
     
    error and Djoga'Ro like this.
  3. skeezix

    skeezix Certified Guru

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    I'm sure you've checked all the usual sources for conflict-free, but the Tantalum caps in some specs are not too much more expensive; tantalum in general is pricier than you like but the conflict free.. 10x the price is okay in small quantity? I've never looked too hard, but we have Kemet supplying them all over .. I think even digikey has them. Theres a local Kemet supplier 10 minutes from my house, but I think he only carryes the .1uF through-hole units, not the 0305 or smaller SMT units. Bloody pricey .. strip of 100 of them was like $60 or something, but conflict free (or a scam, one or the other...)

    random link:
    https://www.digikey.ca/product-detail/en/kemet/T491A105K016AT/399-3678-2-ND/818539
    10c ea at digikey for these 1uF ones,at quantity of 2000.

    jeff
     
  4. levi

    levi Still fresh, damnit!

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    I think tantalum caps are plan z or something by now. They've got a plan A and they're very keen on it (using two chip instead of the one wonky chip and upping the charge frequency to something above 1MHz.

    Regarding the analogue vs digital debate, the last two hurdles encountered (the sirring noise and the RAM voltage drop) were very analogue in nature; a bump charging circuit is an analogue device, and voltage drops are analogue.
     
  5. klapse

    klapse Central Scrutinizer

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    Longer lasting caps are preferable, if the whine is absent.
     
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  6. Djoga'Ro

    Djoga'Ro moonstruck

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    @klapse If the wine is absynth?
    Hm, doesn't work written down :/
     
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  7. Dark Pulse

    Dark Pulse Retreaux

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    Nah, it doesn't work that way either. Absinthe isn't wine at all. It's a spirit.
     
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  8. Djoga'Ro

    Djoga'Ro moonstruck

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    @Dark Pulse Yeah, like "I'm happy with our latest elections, if six is two." :)
     
  9. WizardStan

    WizardStan Mega GP Mania

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    Are you telling me spirits don't whine? I've seen a couple ghost movies and that seems to be a standard feature.
     
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  10. Dark Pulse

    Dark Pulse Retreaux

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    Usually you have to use words like "humbug" to achieve it, but sure, I guess you got me there.
     
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  11. WizardStan

    WizardStan Mega GP Mania

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    Bah!
     
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  12. Grench

    Grench Forum Addict!

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    @EvilDragon What is the status of the plastic insert that goes in the lid with the metal surround? And the metal surround? Would those be the last non-electronics pieces still missing?
     
  13. rygD

    rygD Nihilistic Mystic

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    Also want a few unpainted logo plates.
     
  14. Eight Bit

    Eight Bit Advanced Member

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    They're going to be painted? Thought they'd be aluminium .
     
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  15. rygD

    rygD Nihilistic Mystic

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    I think he said they would be coated black or to match the case or something.
     
  16. Silent-Hunter

    Silent-Hunter Advanced Member

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    I'd prefer nothing be painted, but I guess the logo would stand out more that way.
     
  17. EvilDragon

    EvilDragon Administrator Staff Member

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    It's anodized, not painted.

    Sent from my XT1650-03 using Tapatalk
     
  18. rygD

    rygD Nihilistic Mystic

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    I actually typed that I thought they would be anodized and never submitted the post.

    Still, it would be great to have some silver colored ones. I do have sandpaper, though.
     
  19. Djoga'Ro

    Djoga'Ro moonstruck

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    @rygD As I understand it, anodizing produces an oxide layer, which then is a very good substrate for dye but also means physical protection. Wouldn't hen sanding the coloured part off mean getting rid of that protective layer and reducing the overall material.

    Nevermind, it just occured to me, that we are talking about the logo plate. For some reason I had casing in mind.
     
  20. matzesu

    matzesu Advanced Member

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    Is this Metal Frame around the Logo Stainless??
    The Pyra should be quite long living, you can change the CPU Board and the Battery, whitout the need of a new device
    But I don’t want a rusty Pyra in 20 Years..
     
    Gremblo likes this.

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