Real Current consumption of ODROID C1+

Moderators: mdrjr, odroid

Real Current consumption of ODROID C1+

Unread postby geraldo.gomes » Tue Sep 26, 2017 6:14 am

Hello,

I'm projecting a system with backup energy madeup by supercapacitors to power the ODROID C1+.
So, I need to know the real maximum current consumption without USB peripherals connected to USB ports.

The maximum consumption that I need to know is the real maximum, or so, the maximum current in all possible
cases like startup, normal working or shutdown.

I need this data to buy a less expensive supercapacitor.

Thanks in advance.

Geraldo Gomes.
geraldo.gomes
 
Posts: 6
Joined: Tue Sep 26, 2017 6:02 am
languages_spoken: english
ODROIDs: ODROID C1+

Re: Real Current consumption of ODROID C1+

Unread postby odroid » Tue Sep 26, 2017 10:30 am

If you use only CPU, DRAM and Gbit Ethernet, the maximum power consumption should be less than 550mA.
If you use HDMI and GPU/VPU, it could be up to 650mA.
If you do CPU overclock to 1.8Ghz, it could be up to 800mA. https://wiki.odroid.com/odroid-c1/troub ... erclocking

BTW, which supercapacitors do you consider?
User avatar
odroid
Site Admin
 
Posts: 24602
Joined: Fri Feb 22, 2013 11:14 pm
languages_spoken: English
ODROIDs: ODROID

Re: Real Current consumption of ODROID C1+

Unread postby geraldo.gomes » Tue Sep 26, 2017 11:07 pm

The system must only supply power enough to ensure that Odroid C1 + has finished its shutdown process,
to dont corrupt the SD card.

I need to take more measurements to ensure maximum shutdown time, but using ubuntu minimal image
and the SD card SDSQUNB-016G-GN3MN, the medium shutdown time that I have seen is around 10s.

Initially, I'm intending to discharge the supercapacitor directly on ODROID C1 + and project it to operate
between 5V and 3.5V to guarantee that the internal power supplies will have adequate level (3.5V) on its
inputs to regulate the outputs to 3.3V.

So, considering the capacitor must supply a power of 3.25W during 10s, and it will have a final voltage of 3.5V,
the estimated capacitor will be around 5F / 5V.
geraldo.gomes
 
Posts: 6
Joined: Tue Sep 26, 2017 6:02 am
languages_spoken: english
ODROIDs: ODROID C1+

Re: Real Current consumption of ODROID C1+

Unread postby geraldo.gomes » Wed Oct 11, 2017 10:34 pm

Do you have some suggestions or considerations that I must take into account?
geraldo.gomes
 
Posts: 6
Joined: Tue Sep 26, 2017 6:02 am
languages_spoken: english
ODROIDs: ODROID C1+

Re: Real Current consumption of ODROID C1+

Unread postby odroid » Thu Oct 12, 2017 9:07 am

viewtopic.php?f=115&t=28512&p=204027#p204067
So you might need a step-up DCDC converter.
User avatar
odroid
Site Admin
 
Posts: 24602
Joined: Fri Feb 22, 2013 11:14 pm
languages_spoken: English
ODROIDs: ODROID

Re: Real Current consumption of ODROID C1+

Unread postby mad_ady » Thu Oct 12, 2017 3:04 pm

If you don't use usb you can turn it off to reduce consumption. I don't remember exactly how (either gpio or dtb change), but there's a thread around here discussing low-power options.
If time is an issue you can abandon a clean shutdown and just do
Code: Select all
sync
sync
mount -o ro,remount /
mount -o remount,ro /media/boot

For sensitive applications you may want to consider overlayfs which runs from readonly filesystems with a read-write ram filesystem overlayed on top
User avatar
mad_ady
 
Posts: 2577
Joined: Wed Jul 15, 2015 5:00 pm
Location: Bucharest, Romania
languages_spoken: english
ODROIDs: XU4, C1+, C2


Return to Hardware and peripherals

Who is online

Users browsing this forum: No registered users and 2 guests