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Seiduna
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Re: Power/Voltage Issues on B+

Sun Mar 01, 2015 8:12 pm

hey hey SteveDee, now we are talking!!!

All of you other guys, hang on a minute please:
How came these gpoi thingy did not came up earlier in this thread, or is it my bad english?

So, if I connect via gpio, than losses are less? Yes? No?
and I mean cut the cord, I get two wires, put one on ground and other on 5V? Yes? No?

Thank you
Gnu/Linux,
because I'd rather own a free OS
than steal one that's not worth paying for.

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pluggy
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Location: Barnoldswick, Lancashire,UK
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Re: Power/Voltage Issues on B+

Mon Mar 02, 2015 11:04 am

If you're sticking with a separate cable, look for ones that specify the gauge of cable, the better ones are 22swg or even better 20swg. A couple of yours do, but 28swg is very thin, 24 swg is better. And the shorter the better. The voltage and temperature ratings are largely immaterial.

This should work :

http://www.amazon.co.uk/PortaPow-Chargi ... B0088HTYUE

Good ones tend to be pricey, the official power supply is cheaper.

Connecting via GPIO is possible, but it bypasses the built in protection through the micro-USB socket.
Don't judge Linux by the Pi.......
I must not tread on too many sacred cows......

Rasperman
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Joined: Mon Mar 02, 2015 11:39 am

Re: Power/Voltage Issues on B+

Mon Mar 02, 2015 11:43 am

Try a decent powered hub? :!:

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SteveDee
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Re: Power/Voltage Issues on B+

Mon Mar 02, 2015 8:04 pm

Seiduna wrote:...and I mean cut the cord, I get two wires, put one on ground and other on 5V? ...
You are a dangerous guy Seiduna!

I did NOT suggest that you cut wires and hang your black-blob power supply on the GPIO. Why would you do that? What do you hope to achieve? It's a lose-lose strategy!

My suggestion is that you buy a cheap multimeter. You can then take voltage measurements while you swap black-blobs and cables, until you find a combination that gives a good 5V, and works. If none of them work, go out and buy the thickest USB cable you can find. If that still doesn't meet your power requirements, then buy a power supply like Nick's, which has been properly designed and built for the purpose.

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Seiduna
Posts: 109
Joined: Wed Nov 20, 2013 4:12 pm

Re: Power/Voltage Issues on B+

Tue Mar 03, 2015 9:24 am

oi oi guys, hello,

well, I ordered original rPi power supply and it came in just now.
as I opened it it has the thinnest cable I've seen lately,
and I thought - this ain't gonna fly...

but... I connected and I am running scripts, and no rainbow!!!

oh, i spent too much money getting rPi right power,
and certainly too much of your time,
which I thank you and I do much appreciate.

Thank you all!
Gnu/Linux,
because I'd rather own a free OS
than steal one that's not worth paying for.

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abishur
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Location: USA
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Re: Power/Voltage Issues on B+

Tue Mar 03, 2015 3:29 pm

Seiduna wrote: oh, i spent too much money getting rPi right power,
I'm glad you got it all squared away. Poorly made chargers are definitely a big problem and I wish there was something we could do to more readily address it beyond warning people away from 99 cent adapters off eBay. (and sometimes even those 5 dollar chargers end up being counterfeit or cheap knock-offs that don't deliver what is advertised) :(
Dear forum: Play nice ;-)

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pluggy
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Location: Barnoldswick, Lancashire,UK
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Re: Power/Voltage Issues on B+

Tue Mar 03, 2015 10:51 pm

Seiduna wrote:oi oi guys, hello,

well, I ordered original rPi power supply and it came in just now.
as I opened it it has the thinnest cable I've seen lately,
and I thought - this ain't gonna fly...

but... I connected and I am running scripts, and no rainbow!!!

oh, i spent too much money getting rPi right power,
and certainly too much of your time,
which I thank you and I do much appreciate.

Thank you all!
The official power supply only has 2 conductors and no overall outer sheath, so a lot more of that thin cable is useful copper.

I get a solid 5V at the Pi when its feeding a USB powered hard drive with no hub.
Don't judge Linux by the Pi.......
I must not tread on too many sacred cows......

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