Comment on At 1%

Vinny_93@lemmy.world ⁨2⁩ ⁨months⁩ ago

• sundray@lemmus.org ⁨2⁩ ⁨months⁩ ago

  It’s sending out the pixels, silly! A stream of little pixels in neat little rows.

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• TimeNaan@lemmy.world ⁨2⁩ ⁨months⁩ ago

  Yeah but is the voltage correct? It should be 5V to charge a phone over USB, is that part of the VGA spec?

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  • 9point6@lemmy.world ⁨2⁩ ⁨months⁩ ago

    Yeah I don’t think there’s a 5V pin for VGA.

    I think if we had the scenario where we had a higher voltage than needed, we could have a toasty voltage regulator making something happen, but going the other way would need boost circuit unlikely to exist in these parts, in my understanding

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    • brown567@sh.itjust.works ⁨2⁩ ⁨months⁩ ago

      There is! It’s pin #9

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      • 9point6@lemmy.world ⁨2⁩ ⁨months⁩ ago

        Ah my memory failed me then! Thanks for the correction, I guess this is technically possible then!

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  • Anivia@feddit.org ⁨2⁩ ⁨months⁩ ago

    Doesn’t matter. The VGA to HDMI adapter is active, not passive, so it matters if HDMI has a 5v rail, not VGA

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    • Fluffy_Ruffs@lemmy.world ⁨2⁩ ⁨months⁩ ago

      If, hypothetically, VGA didn’t have a 5v rail then how would power get from the monitor to the HDMI adapter. It would absolutely have to be a part of the spec.

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      • Anivia@feddit.org ⁨2⁩ ⁨months⁩ ago

        It doesn’t need to be 5v. An active adapter can have a buck converter.

        In reality active HDMI adapters get powered by the HDMI device though, not the VGA monitor, so it’s a moot point anyways

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      • knight_alva@lemmy.world ⁨2⁩ ⁨months⁩ ago

        If the vga/hdmi adapter is active then this abomination could actually pass display information provided you had a micro-usb device that supported display out over usb (idk if there is such a thing and if so it probably doesn’t work all that well but still)

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• SkyezOpen@lemmy.world ⁨2⁩ ⁨months⁩ ago

  I don’t know shit about cables but it’s plugged into a monitor. My intuition is that a monitor shouldn’t be pushing power out through a video input port.

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  • pivot_root@lemmy.world ⁨2⁩ ⁨months⁩ ago

    DisplayPort has a +3.3V 500mA pin specifically for pushing power. In theory, great for powering an active adapter. In practice, has killed motherboards because Dell can’t design a computer for shit.

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    • boonhet@sopuli.xyz ⁨2⁩ ⁨months⁩ ago

      Friendly reminder that if you use a Dell charger on a HP, nothing happens but vice versa, you damage the motherboard. It kills a chip used for charging. Dell used the same size barrel jack, but they wired it differently from everyone.

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  • VindictiveJudge@lemmy.world ⁨2⁩ ⁨months⁩ ago

    The monitor has to send some data to the computer to tell it what screen resolutions it accepts. VGA, HDMI, and DisplayPort will all do that for sure. Less certain about component, composite, and S-Video.

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• unknownuserunknownlocation@kbin.earth ⁨2⁩ ⁨months⁩ ago

  Of course electricity comes out of a VGA port, but it's only a signal, I wouldn't assume that it's anywhere near enough to charge a phone.

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  • brown567@sh.itjust.works ⁨2⁩ ⁨months⁩ ago

    Pin #9 of the VGA spec is 5v, though it seems unusual that a monitor would provide power on that pin

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    • ivanafterall@lemmy.world ⁨2⁩ ⁨months⁩ ago

      Thank you, I call bullshit.

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    • TheOakTree@lemmy.zip ⁨2⁩ ⁨months⁩ ago

      Maybe somewhere in the chain, the 5V from pin 9 is being converted to 5V shared across power and the video signal. So even if this chain worked in carrying a video signal it could be very weak or distorted.

      Purely a guess though.

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• outhouseperilous@lemmy.dbzer0.com ⁨2⁩ ⁨months⁩ ago

  The VGA port on a monitor is an input.

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