I was not sure whether to post here or the general chat, so I apologize in advance.
I have a computer speaker set with a subwoofer and the board's supply is a transformer. Its input is 120v AC (standard house voltage) and output 14.4v 10A DC.
My hope is to replace the transformer with a battery/group of cells that I can recharge such that the circuit can either run from the wall or off of the batteries as well as be able to recharge the batteries. I would think running continuous at peak power for two hours is reasonable (though I would really like four).
I want to use lithium ion or lithium polymer batteries, but even lead acid will get the job done. The problem is I just don't know what battery or cells to use, if they need a protection circuit (and what model if they do), and what circuit to use to allow the board to run from either batteries when unplugged or from the wall when plugged AND charge the batteries. I suspect the boards exist I just don't know the terminology to search for them or what the exact model I would need is.
TLDR: Where do I get/how do I make:
1. 14.4v 10A DC rechargeable battery running at least two hours at continuous peak
2. if necessary, a protection circuit for 1.
3. an automatic switch between outlet (120v AC) and battery that also charges the battery when plugged in.
It is possible that if at least I have 1. taken care of I could devise a more manual way of doing things (parallel lines with a switch to change from wall to battery - maybe throw in some diodes where necessary. then just remove the battery and charge it in a standalone charger).
Thanks in advance!
-Craig
I have a computer speaker set with a subwoofer and the board's supply is a transformer. Its input is 120v AC (standard house voltage) and output 14.4v 10A DC.
My hope is to replace the transformer with a battery/group of cells that I can recharge such that the circuit can either run from the wall or off of the batteries as well as be able to recharge the batteries. I would think running continuous at peak power for two hours is reasonable (though I would really like four).
I want to use lithium ion or lithium polymer batteries, but even lead acid will get the job done. The problem is I just don't know what battery or cells to use, if they need a protection circuit (and what model if they do), and what circuit to use to allow the board to run from either batteries when unplugged or from the wall when plugged AND charge the batteries. I suspect the boards exist I just don't know the terminology to search for them or what the exact model I would need is.
TLDR: Where do I get/how do I make:
1. 14.4v 10A DC rechargeable battery running at least two hours at continuous peak
2. if necessary, a protection circuit for 1.
3. an automatic switch between outlet (120v AC) and battery that also charges the battery when plugged in.
It is possible that if at least I have 1. taken care of I could devise a more manual way of doing things (parallel lines with a switch to change from wall to battery - maybe throw in some diodes where necessary. then just remove the battery and charge it in a standalone charger).
Thanks in advance!
-Craig