I am trying to figure out how to create an UPS for things like DSL modems and Wireless phones.
These things run of 12 , 9 or 6 Volt DC and we can wasily get batteries that will last hours.
For example, if we put 10 of these batteries
MAHA / POWEREX 11,000mAh D NiMH Rechargeable Batteries 2pcs pack
We get 110 AH of power.
We should be able to run a PC for 4 hours with that much power (but that will require Power in AC form). A typical UPS that costs ~2k has a 7 AH battery and runs PC for 15 mins.
Question is does anyone on this ofrum have a come across a way to create a DC to DC UPS ? This UPs can take input from a AC - DC converter and have some kind of switching to charging / discharging batteries as and when required.
These things run of 12 , 9 or 6 Volt DC and we can wasily get batteries that will last hours.
For example, if we put 10 of these batteries
MAHA / POWEREX 11,000mAh D NiMH Rechargeable Batteries 2pcs pack
We get 110 AH of power.
We should be able to run a PC for 4 hours with that much power (but that will require Power in AC form). A typical UPS that costs ~2k has a 7 AH battery and runs PC for 15 mins.
Question is does anyone on this ofrum have a come across a way to create a DC to DC UPS ? This UPs can take input from a AC - DC converter and have some kind of switching to charging / discharging batteries as and when required.