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Postby lizbull » Tue Jul 04, 2017 2:31 pm

Hi there,

I confess I know barely nothing about power supplies.....I've put together a pi 3 and a 10.1" display and obviously both of these products have a separate power source. Is there any way you can use the display power and 'split it' off to power the pi too? So that there is only one power cord for the entire unit.

Apologies if it's a thick question, and thanks in advance for your advice!

Liz

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Postby Dave » Tue Jul 04, 2017 3:22 pm

You would need to make sure the power supply had a high enough amperage rating. I can tell you that the power supply provide with the display you have doesn't.

You would need a a good quality 3A power supply at a minimum.

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Postby lizbull » Tue Jul 04, 2017 3:27 pm

Okay cool.

So it is possible? And do you sell anything that would enable this?

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Postby Dave » Tue Jul 04, 2017 3:31 pm

I think the closest thing we have is this - https://www.modmypi.com/raspberry-pi/ac ... er-50-watt

You'll then need to get a couple of USB to Micro USB cables - https://www.modmypi.com/raspberry-pi/ac ... cable-0.5m

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Postby lizbull » Tue Jul 04, 2017 3:36 pm

ahh thanks.

yeah that's way too big unfortunately, only need the two ports in the smallest possible case.

I'll keep looking.

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Postby lizbull » Tue Jul 04, 2017 3:45 pm

I found this that would work: https://www.modmypi.com/raspberry-pi/ac ... ower-cable

But just need a power supply that can draw that many amps (like you said earlier). I take it you don't stock them?

Thanks
Liz

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Postby Dave » Wed Jul 05, 2017 8:25 am

lizbull wrote:I found this that would work: https://www.modmypi.com/raspberry-pi/ac ... ower-cable

But just need a power supply that can draw that many amps (like you said earlier). I take it you don't stock them?

Thanks
Liz


That product is just a short USB cable, it won't split a single power source for multiple devices.

We do have a 3A power supply - https://www.modmypi.com/raspberry-pi/ac ... it-3a-ukeu

Which actually, if you got this - https://www.modmypi.com/adafruit-indust ... tter-cable - and the above short USB cable, that should do what you need it to:

Power Supply --> Short 90deg USB cable --> Y splitter --> Pi / Display

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Postby lizbull » Wed Jul 05, 2017 8:36 am

From the description though, that short USB cable goes from the touchscreen display and powers the Pi using the displays power source?

Your suggestion sounds good...just need to minimise the amount of cables (as this thing ends up in a surround on the wall).

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Postby Dave » Thu Jul 06, 2017 9:25 am

Yes, but its for the Official 7" touch screen - https://www.modmypi.com/raspberry-pi/sc ... y-official

You said you have a 10.1" display, which if bought from us, neither of the 10.1" screens we sell have a USB power output.

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Postby lizbull » Thu Jul 06, 2017 10:16 am

Ahhh what a bugger.

So I guess it's back to your original suggestion - combining the short usb with this https://www.modmypi.com/adafruit-indust ... tter-cable and a bigger amp power supply, then that should do the trick....

I'll order the parts in that case!

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