Reliable Power Supply


8 posts
by phenny » Tue Sep 25, 2012 12:17 pm
Hi all, I suspect there's a few threads on this already but search says the terms are too common.

So I just got my Pi, and was doing a little more reading of the forums and the getting started information, and now I've having doubts about the fairly cheap looking (5v 1A) charger I've purchased from ebay http://www.ebay.com.au/itm/160887240195?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649. The power supplies linked to on this site are mostly for UK wall sockets, and the AU one has a 92 day restock wait :/

Are there any other more commonly available power supplies (which arent dodgy) that I might be able to use from either ebay or amazon? Also I know 5v is a must but is there any harm increasing the amps to 2 or 3 (power noob)?

Cheers,
Phenny
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by malakai » Tue Sep 25, 2012 12:39 pm
You can try searching for tablet chargers or some of the higher end cell phone chargers. I got my charger in a Kodak universal cell phone battery charger http://store.kodak.com/store/ekconsus/en_US/pd/Essential_Universal_Battery_Charger_UC-200/productID.234282900 I got lucky got the kit very cheap.

Not saying to buy that but you would be suprised at what works and I find larger companies tend to make their suppliers work harder to make sure they work properly. Not 100% but beats a non-branded unknown.

You don't have to pay a lot but these adapters are everywhere because so many newer devices need the higher amp rating.


I did see this while on ebay for AU it's still from Hong Kong not sure how long it takes for mail to arrive to you for me about 2 weeks but it has switching listed and the amps and is targeted for a phone that needs both.

http://www.ebay.com.au/itm/AU-USB-Wall-AC-Charger-Adapter-Samsung-Galaxy-S3-i9300-SIII-Ace-S5830-W18150-/261064586088?pt=AU_MobilePhoneAccessories&hash=item3cc8a97368
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by penguintutor » Tue Sep 25, 2012 12:56 pm
There is no harm in having one that can supply a higher current, but the fuse to the Raspberry Pi is set at 1100mA so there is no benefit in having a power supply that is greater than that to the micro-USB connector.

There are other places you can apply power that avoid that fuse, but as far as I'm aware that fuse is still in place on the latest version of the Pi.
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by rew » Tue Sep 25, 2012 1:37 pm
I seem to be the unpopular guy who says that most 1A adapters will work. It's the cheap cables that make things not work. Or the cheap 0.5A ones that can't even manage 0.5A.

It's unlikely to blow anything up. So go ahead and try it. If it doesn't work, try a different cable (Preferably one you got with say an expensive cellphone). If it still doesn't work, try plugging the rpi into a desktop PC. (cheap) Desktop PCs usually don't current-limit the USB power. So the raspberry pi will be able to draw the 400 (in practise) to 700 (spec-ed) mA just fine.
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by bredman » Tue Sep 25, 2012 1:52 pm
Most people seem to be happy with power supplies from HTC, Apple and Kindle.
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by phenny » Tue Sep 25, 2012 2:10 pm
malakai wrote:I did see this while on ebay for AU it's still from Hong Kong not sure how long it takes for mail to arrive to you for me about 2 weeks but it has switching listed and the amps and is targeted for a phone that needs both.

http://www.ebay.com.au/itm/AU-USB-Wall-AC-Charger-Adapter-Samsung-Galaxy-S3-i9300-SIII-Ace-S5830-W18150-/261064586088?pt=AU_MobilePhoneAccessories&hash=item3cc8a97368


This seems good enough for what I'm after, thanks a lot!
Was just a bit unsure when I saw a video in another thread about the really cheap and nasty one taken apart and examined that could barely pull 100ma without a large voltage decrease.

Alrighty, thanks penguin.

@rew I thought it was unsafe (or at least unrecommended) to power the Pi by a computer, possibly due to the low amperage.

@Bredman, okay I'll keep that in mind, cheers.

Thanks for the responses :D
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by Newton » Tue Sep 25, 2012 3:36 pm
Nice modular 2 Amp power supply is LH10-10B05. Fits well even into small housings.

Not for double-lefthanded thumbless persons as soldering is required.
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by pluggy » Tue Sep 25, 2012 4:03 pm
In this country, there are a whole load of vendors on ebay selling 'Raspberry Pi power supplies' which are generally reasonable quality Micro USB chargers tested to work with the Pi. You have a leg to stand on when they don't work. I have two of different makes that both work fine with either of my Pi's. I had a quick look on Aus ebay and they seem to have UK plugs on them.........
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