How to transit between main and battery power

Thread Starter

witssq

Joined Mar 29, 2009
48
Please advise how to transit from main power(3.3VDC) to battery power when main power on, vice versa. as computer does.
I would like to rtc clock such as personal computer.

Thanking you in advance.
 

panic mode

Joined Oct 10, 2011
2,752
you mean switch from main to battery power when main power is off
why would you want to run on battery when main power is present. ;)
 
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