Since the Pi Zero is small and eminently wearable, I thought I’d take some power measurements as this will be useful information for people to plan their projects. So I ran my usual series of tests and updated the table and chart showing all consumer models of Raspberry Pi.
In my standard tests, I measure the current consumption, using the calibrated shunt on my Emeter, while the Pi is: Idling; Loading LXDE; Watching HD video and Shooting HD video. Since the Zero has no camera port, shooting video is not applicable, but all the other measurements were made. Tabulated numerical data below…
And here’s the chart for those who prefer it…
Very Similar to A+
This shows us clearly that the Zero uses pretty much the same amount of ‘juice’ as the A+. This is hardly surprising, given that the processor is the same and there’s not a lot else on either board (just USB keyboard/mouse dongle). They both draw about 100 mA when idle and 140 mA when pushed. It’s possible that the peak current on loading LXDE is a tad higher on the Zero because the CPU is overclocked to 1 GHz and the core L2 cache is also clocked faster – but it could equally just be random measurement error. WJDK!
Voltage under load was 5.09V, so the Pi Zero uses 0.5-0.7 Watts.
I made an infographic with the tech specs on for my launch video. So I thought I’d put that here as well.
One more piece of miscellaneous Pi Zero information. Many programs use the revision number to query which sort of Pi the program is running on. Running
cat /proc/cpuinfo on my Pi Zero gives…
Default Clock Settings