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After posting a comparison of power consumption of the Pi Zero vs other Raspberry Pis a couple days ago, I spent another couple hours today testing various meth
by geerlingguy 11y ago
After posting a comparison of power consumption of the Pi Zero vs other Raspberry Pis a couple days ago, I spent another couple hours today testing various methods of reducing power consumption, and was able to get the idle power usage down to about 25-30 mA on the Pi Zero!
Thanks to a few suggestions from others on the Raspberry Pi forums, Hacker News, and Reddit, I am able to disable the ACT LED and HDMI, and that results in a 5 mA and 30 mA savings, respectively.
- detaro 11y agoDoes it have something in the way of sleep states, outside of being shut down?
- geerlingguy 11y agoThis is another thing I've been investigating, and so far I've come up dry. I really wish there were some way of scheduling it to go into a sleep state, and wake up every 30s or every minute, something like that... you'd think the mobile processor would have some way of doing this, but so far all my searching has been fruitless :( There are hardware add-ons like the Sleepy Pi[1], but that's a large added expense, and makes the management of the overall platform a lot more complicated. [1] http://spellfoundry.com/products/sleepy-pi/ http://spellfoundry.com/products/sleepy-pi/
- analog31 11y agoHow much of this applies to the bigger RPi models? Also, can you throttle the clock speed of the microprocessor and further reduce current consumption?
- newman314 11y agoYou can underclock and use the ondemand cpu governor
- geerlingguy 11y agoIn my testing, underclocking only showed power savings when really stressing the CPU, so it's not as useful to me. I didn't do any GPU-related testing though.
- newman314 11y agoCan you try running things through powertop (follow the recommendations) and measure any possible differences?