Ok, so start with a recent version of Raspbian with the latest 3.10.18 kernel, Raspbian has had all of the GUI and other unnecessary software un-installed, so it's basically running console only.
This is on a 256Mb model B, ethernet is enabled, but no cable connected. Standard clocks, no over, or under clocking.
Current Delta Description 327mA idle, nothing connected other than PSU & SDCard 327mA as above, plus HDMI connected monitor 335mA as above, plus usb keyboard and mouse 336mA as above, plus camera 505mA 169 as above, running raspistill -v -o img.jpg 595mA 259 to 344 running raspivid -v -t 20000 -o vid.h264. note that there are peaks up to approx 680mA every few seconds, presumably as the data is saved to the SD card
So on the face of it, if a model A at idle is 113mA, then approx 280mA when running raspistill, more when running video.
I'm not claiming any great accuracy for these numbers, and there's probably ways to save power by not running the preview window, adjusting capture size and fps for example. But maybe it gives you some idea of what to expect.
So is that ~170mA for taking stills at full resolution? and ~260mA when using video... which is what @JamesH said.
Yep, an additional 170mA on top of the idle current. For a battery operated application, I'd be concerned about the peak load while saving video. At some point the battery might still be able to handle the steady state current draw, but not the peaks. Likely resulting in a corrupt sdcard.
That seems right. Thanks for testing for me. I hope you can get a model A one day!
No interest in a model A, I have more than enough model B's
Has anyone done any power usage testing with the raspberry pi and/or its official camera board?
I am wondering exactly how much the camera uses when it is in use and when it is idle for a project that I am working on. No-one on the other forum seems to have completed power usage testing with the camera.
There is however some testing done with just the Raspberry Pi and those results are very interesting.
For comparison the model B 256M (default clocks):
Idle (console): 0.372A 1.89W
Idle (lightdm running): 0.375A 1.91W
Running scp from SD card: 0.413A 2.09W
Model A (default clocks)
Idle (console): 0.113A 0.587W
cat /dev/urandom | gzip: 0.153A 0.795W
Model A (ARM=350MHz overvolt=0)
Idle (console): 0.111A 0.576W
cat /dev/urandom | gzip: 0.133A 0.691W
Model A (ARM=350MHz overvolt=-8)
Idle (console): 0.106A 0.554W
cat /dev/urandom | gzip: 0.125A 0.652W
Is there anyone who can test the camera and post their results... I am very interested.