5V power with lithium battery backup
Posted: Wed Mar 18, 2015 3:40 pm
Hello,
I would like to power vocore from a 5V source such as USB port with a lithium battery (such as CR2032 or CR123A) for backup.
I am sure that powering off vocore, switching the power source, and powering it back on should work.
It would be cool to be able to unplug the 5V source or reboot your PC without vocore powering off.
I suspect that connecting the output of the 5V->3V3 regulator together with the battery is not wise but just switching from one to the other might cause a spike since the battery can have anywhere from 3.2 to 3.7V.
I am not an electrical engineer so I might try a thing or two and if it works that's good and if not whatever.
If somebody has a solution that is *supposed* to work I would like to hear.
Thanks
I would like to power vocore from a 5V source such as USB port with a lithium battery (such as CR2032 or CR123A) for backup.
I am sure that powering off vocore, switching the power source, and powering it back on should work.
It would be cool to be able to unplug the 5V source or reboot your PC without vocore powering off.
I suspect that connecting the output of the 5V->3V3 regulator together with the battery is not wise but just switching from one to the other might cause a spike since the battery can have anywhere from 3.2 to 3.7V.
I am not an electrical engineer so I might try a thing or two and if it works that's good and if not whatever.
If somebody has a solution that is *supposed* to work I would like to hear.
Thanks