Spirit
Newbie level 5
![Newbie level 5](/styles/images/ranks/blevel2.gif)
I want to build uninterruptible power supply 12V, 0.5A, with batteries of 3-4Ah for home alarm sistem.
UPS is specific for using batteries because in normaln situation, batteries are always in stand by mode. Only if there is some fault, batteries must work.
I think that LM2574 is good choice for alarm power supply, and battery charger must have inteligent controls like MAX712 for Ni-MH.
Because of that, I am not shure if Ni-MH batteries are good for this type of usage?
I need long lifetime and 3-4Ah storage with max 0.6A current.
Which battery chemistry is the best for that UPS?
If anybady has any schematic of something like that, please share with me.
UPS is specific for using batteries because in normaln situation, batteries are always in stand by mode. Only if there is some fault, batteries must work.
I think that LM2574 is good choice for alarm power supply, and battery charger must have inteligent controls like MAX712 for Ni-MH.
Because of that, I am not shure if Ni-MH batteries are good for this type of usage?
I need long lifetime and 3-4Ah storage with max 0.6A current.
Which battery chemistry is the best for that UPS?
If anybady has any schematic of something like that, please share with me.