On 06/01/2021 17:04, Martin Gregorie wrote:
> On Wed, 06 Jan 2021 16:41:25 +0000, Theo wrote:
>
>
>> Maybe there are use cases where people want to
>> power their Pis from HDMI, I don't know.
>>
> Doing that would make the installation tidier if I wanted to glue the Pi
> enclosure to the back of the screen - provided that the screen
> can provide the wattage needed. Is that likely, bearing in mind that, if
> I did that, I'd also want it to power a keyboard and mouse via the USB
> sockets on the Pi.

HDMI will never power a Pi, way too thirsty.

Similar devices such as an Amazon Firestick have to have an external
PSU, as they require more power than even the TV's USB port can supply.
Note that if this does seem to work, you are probably overstressing your
TVs electronics, which will lead to premature failure.

---druck

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