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Topic: low power consumption 328p (Read 1 time) previous topic - next topic

dtokez

Hi all. I would like to run an 328P at low power, will it be OK running from 3x AA batteries? At what voltage is it likely to stop running?

If I used the internal 8MHz clock, would that improve consumption much? I want to make a IR remote control, will running at 8Mhz screw the sketch up - timings etc?

Thanks

MichaelMeissner

You might want to read this for more pointers on running in minimal power: http://www.gammon.com.au/power

fungus


Hi all. I would like to run an 328P at low power, will it be OK running from 3x AA batteries? At what voltage is it likely to stop running?


3 batteries is fine.


If I used the internal 8MHz clock, would that improve consumption much?


The datasheet says that will save you about 4mA.


I want to make a IR remote control, will running at 8Mhz screw the sketch up - timings etc?


That depends on the sketch....and my crystal ball is in for repair.

OTOH you should spend as much time as possible sleeping so running at 8MHz won't save much. If it's going to mess up the timings then don't do it.
No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

dtokez

Thanks guys. That is true if it is sleeping I guess 16MHz will be fine.

Probably a silly question but running at 8MHz, will the whole sketch run half speed - IE. delay(100) would become delay(200)?

Thanks

fungus


Probably a silly question but running at 8MHz, will the whole sketch run half speed - IE. delay(100) would become delay(200)?


Not if you configure things properly.

No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

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