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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Can you suggest any online suppliers for such a DPDT or DPCO? Yes,
12 volts is much more common. I really have no idea where I can
find such a relay that I can solder or otherwise attach wires...
Industrial UPS...good idea.
I need about 250 watts for about 4 hours (slightly overestimated for safety)
at 110 watts.
As best I can calculate, a UPS style system with a marine battery on a
charger should work great. I think a battery powered timer should be
able to handle the trickle...
Maybe I can use a "double throw, double pole, break-before-make" relay
to make the transfer. If I power the switching with a transformer on the
mains, when the mains power failed, it would then switch over to the battery/inverter supply.
Does this make any sense? Would it work? If so...
That all makes sense. Oh well, I know I can connect a battery charger
to a car battery and then to an inverter. I can then run the fans off the
inverter full-time. This is hard on all of the equipment involved though.
I would rather not wear the battery charger and inverter out so soon.
Seems...
Even if you build it yourself?
How about a "dropout switch" or a "changeover switch?"
I am very familiar with pre-packaged UPS systems. You
give me an idea. Could I just steal the major components of
an off-the-shelf UPS and just replace the connected battery
with one or more car...
What do you call a circuit that switches from household
110 to batteries when the electricity goes out (and back
to the mains when the electricity comes back on)?
Is there a proper name or description for this type of circuit?
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