At 05:09 PM 3/14/2004 -0800, jay marante wrote: >isn't the back-up battery always conducting on that state even if the main power is on? No, the diode in series with the battery is reverse-biased. If the backup is a lithium, you need dual diodes, or a current limiting scheme to some very small current, so that a single component failure won't give you an exploding lithium battery.
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Re: [AVR-Chat] back-up power supply circuit
2004-03-15 by David VanHorn