Are you planning to add a battery backup for OBI devices?
SteveInWA:
Quote from: dircom on December 09, 2015, 10:44:16 am
Quote from: SteveInWA on December 05, 2015, 08:45:38 pm
Quote from: restamp on December 05, 2015, 07:32:50 pm
I have a friend, BTW, who is running his OBi200 off a 12.6V trickle-charged battery. So far, it's run fine.
A Lead acid battery can be 13+ volts
would you recommend using a linear regulator?
or a 12V Step-up/Step-Down Voltage Regulator?
I believe that most equipment that uses "wall wart" style, 12VDC adapters should be able to sufficiently regulate lead-acid battery voltage without additional, external voltage regulation.
Confuzed:
Quote from: SteveInWA on December 09, 2015, 03:54:11 pm
Quote from: dircom on December 09, 2015, 10:44:16 am
Quote from: SteveInWA on December 05, 2015, 08:45:38 pm
Quote from: restamp on December 05, 2015, 07:32:50 pm
I have a friend, BTW, who is running his OBi200 off a 12.6V trickle-charged battery. So far, it's run fine.
A Lead acid battery can be 13+ volts
would you recommend using a linear regulator?
or a 12V Step-up/Step-Down Voltage Regulator?
I believe that most equipment that uses "wall wart" style, 12VDC adapters should be able to sufficiently regulate lead-acid battery voltage without additional, external voltage regulation.
There are a number of cheap solutions for building your own DC-DC UPS. Grab one of these, for example, add a 12V battery and a suitable charger and your
good to go.
http://www.mini-box.com/picoUPS-100-12V-DC-micro-UPS-system-battery-backup-system
Here is a sample implementation: http://e.molioner.dk/projects/ups/
Basically, the device takes a 15V-18V DC input and outputs 12V DC to the device while charging the battery. If the DC input gets cut (power outage) the device will draw from the battery.
The OpenUPS and OpenUPS2 do basically the same thing, but add support for Windows monitoring and custom programmability if you want to pay for it: http://www.mini-box.com/OpenUPS?sc=8&category=981, http://www.mini-box.com/OpenUPS2?sc=8&category=981.
There are a variety of solutions available on that site (and elsewhere) that will allow you to build your own UPS with varying levels of features. Personally I would go cheap and grab the picoUPS, a 12V deep discharge scooter battery or two, and appropriate charger.... could put something together for $100 or so that might give you hours of runtime.
Lavarock7:
My Panasonic DECT phones have a neat option. The phone has a battery which can power the base, if the base looses power.
Although I have multiple UPS's, I am also a Ham Radio/technical-type guy. I would hook phones and other DC voltage type items to a car battery. This would give lots of extra time without the battery to 120 volt and back to DC voltage conversions which happen between a UPS battery and the charger plugged into it.There are Youtube videos on how to open a UPS and tap off the internal battery direct to DC.
As an aside, using a LED bulb in a fixture hooked to a UPS gives lots of light for little current draw.
drgeoff:
Quote from: Lavarock7 on December 11, 2015, 10:03:34 am
There are Youtube videos on how to open a UPS and tap off the internal battery direct to DC.
I would advise extreme caution before doing that. I have a Belkin UPS which has the following words moulded into the interior side of the battery cover:
"Caution
Risk of electrical shock.
Battery circuit is not isolated from AC input.
Hazardous voltage may exist between terminals and ground.
Disconnect powercord from wall receptacle before servicing battery."
While I don't doubt that connecting to the battery is perfectly safe on some UPS units, clearly there are some where it is not.
ceg3:
Maybe the simplest answer is a good one. I go back to my suggestion to just by yourself a UPS with enough juice to run your OBi and network devices long enough to finish your call. Of course, there are ways to survive an extended outage, such as buying a generator for your house. I remember when a hurricane put my city in dark for several days I left my dark townhouse and went next door where my tech savvy neighbor was watching TV and cooking. I was never so jealous.
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