Read the statement by Michael Teeuw here.
Can the usb port from a monitor power the rpi3?
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@KirAsh4 hi! Thx for your reply. That’s also what I assumed but wanted to get opinions from others :) anyway thx again for taking the time to answer.
I assume therefore that there is no need for any other reasons to buy a monitor with USB ports? What’s your opinion on this ? -
Not for MM, I can’t think of any.
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I looked into this as well and came to much the same conclusion as @KirAsh4. USB ports on the monitors added a significant expense and couldn’t provide the power for the Pi.
If you were going to power another accessory from the monitor’s USB, it might make sense. I believe one mirror builder is running external speakers from his monitor’s USB jack. You could probably run an LED strip for accent lighting from it.
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@bhepler thx also for your input on this.
I wanted to be on a safe side in case in future I would need to use/add any additional components but so far I don’t see any added value to have USB ports on the screen.
Thx a lot both for your time and help -
And even if you find out that you need additional devices later, you are better off with a good quality self-powered USB hub. They’re cheap, they’re small, you could even remove the whole circuitry from the case for a much smaller form factor.
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@KirAsh4 I agree with your point of view - safer and cheaper. I will have a look on those hubs later… I red somewhere that not all of them are efficient with rpi3.
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That’s correct, and that’s because of their power outputs. You have to find out that powered and that has a nice high output. I actually run one of my rpis off of an Anker wall charger that outputs up to 2.4Amps per port.
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@KirAsh4 ya a wall powered one will surely supply nice output power. If you want to share your Anker model - feel free :p
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Lots and lots of them on Amazon. It really depends on your application. I have both 2, 4, and 5 ports around the house for various things. Hit Amazon, and search for ‘Anker wall charger’. Then look at their outputs and do the math. For example, if you see a 4-port, 40W, the calculation is:
40W / 4 ports = 10W per port
Each port supplies 5V, so 10W / 5V = 2Amps per port.Read the descriptions on them. I generally only buy those that can supply upwards of 2.4Amps on at least 1 port (and 2Amps on the others). But they have models that can supply that much on all ports as well.
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@KirAsh4 I think it’s rather 40W / 4 ports = 10W per port :-) but no prob I got the math ;-) I will have a look and again and let you know in case. Thx so much for your time! Appreciated.
