Power Supply


17 posts
by Possum » Mon Jun 18, 2012 2:04 am
Hi

I have lots of old power supplies for things like Router, Switches and so on. How can I chose one of these as a power source for the RPi.

thank you
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by jbeale » Mon Jun 18, 2012 2:13 am
You need a supply that can do 5V with at least 750 mA (1A or better is recommended; power supplies are often less than the label claims). Also, you need to get that power into a miniUSB cable for the R-Pi power input connector, which is not typical of supplies for routers, etc.

(Unless you are hacking your own connector going into the GPIO, etc.)
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by Possum » Mon Jun 18, 2012 3:50 am
That means I should buy a power supply that has a miniUSB output with correct voltage ect.

What is the recommended one for the RPi ?

Thank you...
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by itimpi » Mon Jun 18, 2012 5:40 am
Just to note - the Pi takes a Micro-USB on the power connector (as used by many mobile phones) - not a Mini-USB.
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by s2t2 » Thu Jun 21, 2012 10:57 pm
I just used my Blackberry power supply with my Raspberry : it works fine ! Just a question of fruits ? ;)
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by AndyD » Thu Jun 21, 2012 11:41 pm
Hi Possum,
I see that you live in Adelaide. I live in Melbourne and found it difficult to find a reasonably priced power supply that met the required specs. I eventually managed to buy a Nokia charger (5v 1200mA cost around $30 to $35 depending on the store) for less than $AU20 from one of the many Dick Smith stores that are closing down. Officeworks in Croydon SA has limited stock (according to their website) for $AU30.
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by abishur » Fri Jun 22, 2012 12:12 am
s2t2 wrote:! Just a question of fruits ? ;)


Made me think of this video (that's a link to the youtube video)
Dear forum: Play nice ;-)
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by Dilligaf » Fri Jun 22, 2012 12:44 am
If you can find a switching power supply like this http://www.ebay.com/itm/US-DC-5V-2A-Swi ... 0617446384 you will have to modify the connector (cut it off and splice a micro usb cable) it would be of benefit. Most problems with the Pi are caused by faulty power sources. A charger is meant to charge, not power an appliance.

Mike
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by AndyD » Fri Jun 22, 2012 2:01 am
@Dilligaf: The only problem is that the OP is from Australia. The Australian power sockets are different to the US ones. http://en.wikipedia.org/wiki/Australian_power_connector
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by UNTEngineer » Fri Jun 22, 2012 7:20 am
Does anyone know if I can use my transformer for charging my iPhone? That little white cube does 5v at 1A.
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by Dilligaf » Fri Jun 22, 2012 6:16 pm
AndyD wrote:@Dilligaf: The only problem is that the OP is from Australia. The Australian power sockets are different to the US ones. http://en.wikipedia.org/wiki/Australian_power_connector


That's why I said LIKE this one, it's the first one that came up on a Google search for 5v 2a switching power supply. My point is a switching power supply is designed to power an object and not just charge one. With the multiple problems that people are having with chargers I don't see why people are recommending them when you can get a true power supply for comparable costs. As a side note most Belkin USB hubs come with a 5v switching power supply rather than a cheap wall wart.
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by AndyD » Fri Jun 22, 2012 11:25 pm
@Dilligaf: Sorry that I misunderstood! I really need to learn more about harware/electronics.
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by LucaParoni » Wed Jul 18, 2012 12:14 am
Hi everybody,

I also have a blackberry power supply.
And I was wondering if I can really use it safely. On the power supply is written down:

INPUT: 100-240V - 150mA 50-60Hz
10-20VA

OUTPUT: 5V - 700mA

am I correct to check the output, right? Is at least 700mA so it should be fine or not?
Thanks a lot,
looking forward to boot up my raspberry. So I want to be sure I will burn everything at the first step :D

Luca
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by Ocean20 » Wed Jul 18, 2012 2:57 am
Go to https://lh5.googleusercontent.com/-BcLK ... +micro.png

There is a picture of two USB power connectors. The one on the right is the one you want. For RPI model B it has to be 5 VDC and no more that 1.2 Amp. They usually are 1 amp. The connector on the left is used for some Mobile phones
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by LucaParoni » Wed Jul 18, 2012 8:01 am
Ocean20 wrote:Go to https://lh5.googleusercontent.com/-BcLK ... +micro.png

There is a picture of two USB power connectors. The one on the right is the one you want. For RPI model B it has to be 5 VDC and no more that 1.2 Amp. They usually are 1 amp. The connector on the left is used for some Mobile phones



Is it the reply at my question? I mean. The connector indeed looks like the one on the right but then you are saing that I can use mine starting from the input/outup informations I wrote down?

Thank you
L
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by itimpi » Wed Jul 18, 2012 9:39 am
LucaParoni wrote:Is it the reply at my question? I mean. The connector indeed looks like the one on the right but then you are saing that I can use mine starting from the input/outup informations I wrote down?

I nthink you will be OK. There are a number of Blackberry chargers on the verified list at http://elinux.org/RPi_VerifiedPeriphera ... r_Adapters.
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by LucaParoni » Wed Jul 18, 2012 9:45 am
itimpi wrote:
LucaParoni wrote:Is it the reply at my question? I mean. The connector indeed looks like the one on the right but then you are saing that I can use mine starting from the input/outup informations I wrote down?


I nthink you will be OK. There are a number of Blackberry chargers on the verified list at http://elinux.org/RPi_VerifiedPeriphera ... r_Adapters.


Thank you very much. Indeed is the same of one that is in that list.
have a nice day,
L
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