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Next: Help converting simple schematic to 110v
From: Dirk Bruere at NeoPax on 25 Jun 2010 12:00
I'm looking for a mains/USB PSU and am thinking of just buying a mobile
phone charger. However, I can't find a lot of detail about MTBF. Has
anyone any info on popular models? I'm currently using the one I got
with my Motorola Razr - quite neat.

--
Dirk

http://www.transcendence.me.uk/ - Transcendence UK
http://www.blogtalkradio.com/onetribe - Occult Talk Show
From: Joel Koltner on 25 Jun 2010 13:00
"Dirk Bruere at NeoPax" <dirk.bruere(a)gmail.com> wrote in message
news:88k24dFtnnU1(a)mid.individual.net...
> I'm looking for a mains/USB PSU and am thinking of just buying a mobile
> phone charger. However, I can't find a lot of detail about MTBF. Has anyone
> any info on popular models?

I'm willing to bet that very few manufacturers even calculate MTBF on these
things. They're so inexpensive that I think your best bet is to shop by
features (e.g., single, dual, or quad output), look at user reviews, and then
just cross your fingers.

This adapter is one I have that actually gets carried around in my backpack:
http://www.amazon.com/Aiptek-ZPT-USB-USB-AC-Charger-Adapter/dp/B001639PHO .
It was the smallest (well, at least thinest) adapter I could find that had two
USB sockets on it.

But if you search amazon for "USB adapter" you'll get a plethora of results.
I think the Apple "cube"-type adapter --
http://www.amazon.com/Apple-Power-Adapter-iPod-iPhone/dp/B001GQ3DP6 -- is
kinda near and *should* be decent quality, although I've never had one myself.
There are many generic clones of that adapter if you want something cheaper,
too -- but of course who knows about quality then? (Apparently even if you
buy through Amazon you might get a clone without knowing it... :-( -- see the
reviews on that page.)

---Joel

From: D Yuniskis on 25 Jun 2010 13:33
Dirk Bruere at NeoPax wrote:
> I'm looking for a mains/USB PSU and am thinking of just buying a mobile
> phone charger. However, I can't find a lot of detail about MTBF. Has
> anyone any info on popular models? I'm currently using the one I got
> with my Motorola Razr - quite neat.

What sort of USB connector do you want it to have; A-receptacle, miniA
plug, miniB, microAB, microB?

I have accumulated several different varieties and found the
"A receptacle" to be the most useful (for me) -- add an
appropriate cable to connect to the device in question and
it just works...

As for MTBF... consider the market that is being addressed
(cell phones being essentially *disposable*) and the size
involved.

Having said that, the only such "wall wart" that I have encountered
defective was an Apple FireWire "charger" (and the defect was
essentially mechanical -- having to do with the "fold out"
AC plug not making contact, internally).

Be advised that some of these devices appear to have some
smarts/logic in them. E.g., some Motogorilla products wouldn't
"recognize" generic 5V USB power sources (perhaps the device
talks to the charger?)
From: Dirk Bruere at NeoPax on 25 Jun 2010 14:02
On 25/06/2010 18:00, Joel Koltner wrote:
> "Dirk Bruere at NeoPax" <dirk.bruere(a)gmail.com> wrote in message
> news:88k24dFtnnU1(a)mid.individual.net...
>> I'm looking for a mains/USB PSU and am thinking of just buying a
>> mobile phone charger. However, I can't find a lot of detail about
>> MTBF. Has anyone any info on popular models?
>
> I'm willing to bet that very few manufacturers even calculate MTBF on
> these things. They're so inexpensive that I think your best bet is to
> shop by features (e.g., single, dual, or quad output), look at user
> reviews, and then just cross your fingers.
>
> This adapter is one I have that actually gets carried around in my
> backpack:
> http://www.amazon.com/Aiptek-ZPT-USB-USB-AC-Charger-Adapter/dp/B001639PHO .
> It was the smallest (well, at least thinest) adapter I could find that
> had two USB sockets on it.
>
> But if you search amazon for "USB adapter" you'll get a plethora of
> results. I think the Apple "cube"-type adapter --
> http://www.amazon.com/Apple-Power-Adapter-iPod-iPhone/dp/B001GQ3DP6 --
> is kinda near and *should* be decent quality, although I've never had
> one myself. There are many generic clones of that adapter if you want
> something cheaper, too -- but of course who knows about quality then?
> (Apparently even if you buy through Amazon you might get a clone without
> knowing it... :-( -- see the reviews on that page.)
>
> ---Joel
>

I have a DSP board I want to include in a product.
It's power source is either 5-12DC on a standard power socket, or via
it's mini-USB i/f. I suppose ideally I want a wallwart that has a mains
lead in:-( The alternative is to put a mains socket inside the enclosure
(it already has a mains cable for the other stuff in the box, a
power-amp), or buy some hideously expensive PSU.

--
Dirk

http://www.transcendence.me.uk/ - Transcendence UK
http://www.blogtalkradio.com/onetribe - Occult Talk Show
From: mickgeyver on 25 Jun 2010 19:14
On Jun 25, 12:00 pm, Dirk Bruere at NeoPax <dirk.bru...(a)gmail.com>
wrote:
> I'm looking for a mains/USB PSU and am thinking of just buying a mobile
> phone charger. However, I can't find a lot of detail about MTBF. Has
> anyone any info on popular models? I'm currently using the one I got
> with my Motorola Razr - quite neat.
>
> --
> Dirk
>
> http://www.transcendence.me.uk/- Transcendence UKhttp://www.blogtalkradio..com/onetribe- Occult Talk Show

Check out a video games store such as GameStop. they sell USB
wallwarts for about 10$ each in the US. I do recognize you're across
the pond but I guess there is a similar store over there. My kid has
one with a female USB on it and can use whatever style cable to adapt
to his gizmos.
Regards,
al
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Next: Help converting simple schematic to 110v