Author Topic: What if using a power supply lower than 2A  (Read 5112 times)

Scott

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What if using a power supply lower than 2A
« on: February 25, 2013, 11:41:09 am »
It's hard to find a 5V-2A power supply and I don't happen to have a PSP. so I have to use my Phone's 5V-0.8A adapter. the question is: Would the cubie get slower in this case?

ale92_

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Re: What if using a power supply lower than 2A
« Reply #1 on: February 25, 2013, 01:32:32 pm »
The Cubieboard should boot even with 500mA given by the usb port so you should be fine, unless you have some usb or sata hard disk plugged in then i guess it won't boot up at all.

Here is the power consuption that Alexandr Shutko posted this on the mailing list a couple of days ago

Cubieboard 1G ram 2012-09-09:

459mA - running stress test (stressapptest) with ethernet connected
389mA - running stress test (stressapptest)
286mA - idle (performance mode) with ethernet connected
222mA - idle (performance mode)
211mA   - idle, GPU_freq=100MHz with ethernet connected
136mA   - idle, GPU_freq=100MHz
 
and....

 
Cubieboard 1G ram 2012-09-09 + ethernet + sata ssd smp35 64Gb disk as root:
904ma - running stress test (stressapptest + dd if=/dev/zero of=/file + scp copy of 1G file)
448ma - idle at performance mode (1Ghz)
360ma - idle at 100MHz

Offline FloBue

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Re: What if using a power supply lower than 2A
« Reply #2 on: February 25, 2013, 01:34:12 pm »
i used a 1,2A power supply.
with connected hdmi and ethernet, the ethernet connection was veeeery slow.
only connected the ethernet it ran well.
so i wouldn't suggest using a powersupply with less than 2A.


Offline patwood

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Re: What if using a power supply lower than 2A
« Reply #3 on: February 25, 2013, 06:33:55 pm »
I regularly run the Cubieboard with a .5A phone charger; ethernet is fine.  You may be experiencing a different problem with the ethernet.  I only use the HDMI for framebuffer (text console), not a UI, so my power requirements may be a lot lower than yours.

Offline OmahaVike

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Re: What if using a power supply lower than 2A
« Reply #4 on: February 26, 2013, 07:48:58 am »
Another option...  you could pick up a PSP AC adapter from Amazon for $10US.

Offline kingneutron

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