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Author Topic: How do you power up your projects from batteries?  (Read 1244 times)

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Offline aluckTopic starter

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How do you power up your projects from batteries?
« on: November 12, 2012, 12:22:42 pm »
I have a simple project built around ATMega8. It powers from a standard 9V battery with following 7805 regulator.

Unfortunately, it has quite a lot of quiescent current. In a sleep mode ATMega consumes around 0.8 mA when powered from 5V source directly, but powered from 7805 it is more like 3.8-4.0 mA. It approximates for about 2 months lifetime for 9V battery.

Is there any good way to minimize current?
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Offline deephaven

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Re: How do you power up your projects from batteries?
« Reply #1 on: November 12, 2012, 12:28:58 pm »
Use a low quiescent regulator like an MC78LC50NTRG
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Offline aluckTopic starter

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Re: How do you power up your projects from batteries?
« Reply #2 on: November 12, 2012, 03:52:14 pm »
Nice! Thanks.
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