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Author Topic: Atmega battery life  (Read 1330 times)
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California
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If The atmega328p is running constantly off a 9v battery, what would the life of that battery be about? Not counting anything else attached to it.
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With no sleep mode enabled? A few hours probably.
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I read some where around 13 hours with a PP3 type alkaline.
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With typical Power Consumption of about 5mA when active at 16MHz, 9v battery of 150mAh capacity.
it will be 150mAh/5mA about 30 hours.
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I don't think you connected the grounds, Dave.
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Quote
it will be 150mAh/5mA about 30 hours.
...less the power wasted in the regulator.

PP3 batteries are a terrible way of powering Arduinos.
For a similar volume, you'd be better off with 4 NiMh AAs bypassing the regulator.
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With typical Power Consumption of about 5mA when active at 16MHz, 9v battery of 150mAh capacity.
it will be 150mAh/5mA about 30 hours.
You haven't accounted for the loss through the regulator and various other factors.

I assumed we are talking about an arduino rather than just a chip - 13 hours looks more likely.

Mowcius
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California
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Thanks guys
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