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[–] 43 points 1 year ago (1 child)
  • [–] 23 points 1 year ago (1 child)

    IF the phone can output enough power with it's OTG port AND has the correct drivers for that cheap-ass looking USB framebuffer graphics thing AND that's an active HDMI to VGA adapter rather than some shitty vendor-specific implementation based on some unholy bastardisation AND the phone supports external displays... then I still don't think it'd work, tbh (but it won't (it might though (it won't))).

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  • [–] 18 points 1 year ago (4 children)

    yeah? well I have a
    wall outlet › USB-A › Micro USB › USB-C › THC
    adapter, how about that? (it just ends in my rechargeable cart)

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  • [–] 15 points 1 year ago* (3 children)

    If you had an old HTC windows ce 6.0 it might work. Like the HTC tilt 2.

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  • [–] 87 points 1 year ago (23 children)

    What did dude think was coming out of the VGA port? Tiny photographs? It's all electricity through wires, of course it'll send some electricity into a phone

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  • [–] 44 points 1 year ago (7 children)

    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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  • [–] 18 points 1 year ago (3 children)

    With USB power delivery, you can get 9V, 12V or higher over USB. Usually the device requests higher voltage from a PD charger, but it's not impossible for a modern device to be able to cope with just having 12V shoved into it.

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  • [–] 7 points 1 year ago (2 children)

    The USB device would have been made wrong if it just shoved 12V down the power lines without negotiating it.

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  • [–] 1 point 1 year ago (1 child)

    That's probably only true for USB power supplies - a USB adapter isn't set up to do anything with voltage and probably just passes the positive and negative pins through.

    The VGA adapter feeding power back through USB in the first place, yeah, that's not supposed to happen.

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  • [–] 7 points 1 year ago* (2 children)

    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 circuitry unlikely to exist in these parts, in my understanding

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  • [–] 19 points 1 year ago (8 children)

    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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  • [–] 27 points 1 year ago (1 child)

    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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  • [–] 4 points 1 year 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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  • [–] -2 points 1 year ago (3 children)

    Signals aren't magic, they consist of electrical power. You can get at least a little bit of power from anything that isn't an optical port.

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  • [–] 2 points 1 year ago* (last edited 1 year ago)

    Technically, even an optical port can deliver power. Light is just a particular form of electromagnetic wave that just happens to use another method of transmission (and you might need a different mechanism to transform its energy), but it also has an intensity, potential energy and resistance in the medium of propagation.

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  • [–] 7 points 1 year ago (3 children)

    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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  • [–] 7 points 1 year ago (2 children)

    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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  • [–] 1 point 1 year 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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  • [–] 11 points 1 year ago (2 children)

    The micro is probably charge only, no data. So no signal.

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  • [–] 3 points 1 year ago

    Even with a data-capable cable I don't think most microUSB ports have video output capabilities. You'd have to find a cable/adapter specifically designed for video out, and a device with the explicit capability (usually cameras and phones).

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  • [–] 9 points 1 year ago

    My old tower pc used to give wicked electric shocks off the hdmi ports. Pretty sure I could have run space heaters off those fuckers

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  • [–] 7 points 1 year ago (1 child)

    This pissed me off so much that I accidentally backed out and up voted a post I didn't even look at. Fuck you, sir.

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  • [–] 3 points 1 year ago (15 children)

    Am I in the minority of people who never used VGA?

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  • [–] 48 points 1 year ago (1 child)
  • [–] 1 point 1 year ago*

    The only time I've encountered VGA was my first year as an intern, my office had given me a 4:3 flat screen monitor which frequently gave me migraines. Thing had to be older than me. That was 7 years ago.

    If I encountered it before that, I wasn't aware of it because I was a child and wasn't responsible for plugging in the monitors I was using.

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  • [–] 14 points 1 year ago (9 children)

    What did you use then? I remember cheap monitors in the early 00s ONLY having VGA. By the time I'd moved on, HDMI was so ubiquitous, I skipped DVI instead.

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  • [–] 13 points 1 year ago (3 children)

    Very legitimate possiblity OP was born in the early 00's

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  • [–] 2 points 1 year ago (3 children)

    If you were rich enough, could have only used displays with RGB-BNC.

    Or maybe they're kinda crazy and used Component video with a TV screen. (Or composite...)

    Or maybe they're just not that old.

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  • [–] 0 points 1 year ago (2 children)

    I've never even heard of video over BNC, and my searches turn up SCART adapters, so I'm guessing it was a British thing?

    I think we were talking about computer monitors, not televisions.

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  • [–] 4 points 1 year ago (1 child)

    BNC connections were used on professional level video equipment, if you were rich enough, you could get an extremely high quality computer monitor and video card that used those.

    Older computers, especially early home computers sometimes just had composite connectors to a TV. Older computer monitors often had a composite input, but SCART was also an option.

    Higher end computer monitors sometimes had similar inputs to early HDTVs, there's a lot of crossover.

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  • [–] 1 point 1 year ago* (last edited 1 year ago)

    Monitors at Walmart still have VGA available, so someone must be using it.

    Also a bit weird in that they have a “modern” set of just VGA/HDMI, as a monitor of the period would have DVI, too. Think DVI wasn’t ever really a thing except for power users though.

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