I'm owning a LG 37LV5590 Television. May I operate the Raspberry with the power from the TVs USB-Port? Would be quite convenient, since switching on the TV would as well switch on the Raspberry and no further power supply would be required.
How do I know the TVs USB provides sufficient mA and Voltage?
I run my Pi off the USB port on my desktop PC. Supposed to be limited to 500mA, but isn't. I reckon the TV will be much the same.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
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I've been running mine directly off a 24" Samsung HD monitor and a 50" Sony TV. Seems to work fine in both instances but I havent' tried running the pi for over an hour yet.
I'm currently trying to write a script that will boot up Chromium, navigate to a specific webpage, log in to the site and proceed to a specific page (an analytics dashboard showing the statistics of the website I work on). I want this to happen automatically so the TV can be put on a sleep timer (or timer plug in the wall) and have everything turn off at night then boot and show the data automatically each morning.
Many TV ports are there to run drives from, so there is good chance they are providing more, just look up the TV specs. But do as most do (like above) and try it.
Laptop and computers also have this same answer, a lot now come with charging enabled ports so can provide 2A+
Again it's an open question. Now long is a piece of string? You don't know till you measure it.
Just don't look at the manual and the RS232 port on the back of the TV if there is one.