Reduce speed

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I want to use my BananaPi with Lubuntu primarely as a wordprocessor and I wonder if it is possible to reduce processorspeed.
I am electrosensitive and want to reduce the electric radiation.
I'm not convinced that it would reduce radiation (of what?) in any way - the amount of operations is the same and the processor will simply sleep when not active. You might be able to change the frequency of radiation. In any case, a proper metallic case will help more than any other measure. Plus using shielded cables for everything you attach to the device.

That said - the answer to the question is "yes" and in most distributions there actually is a CPU frequency scaler active. It will adapt frequency to the current use. Google for cpufreq to find tools and information to manually influence its behaviour.

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