MacGyver a flat 12v battery from the HV ?

[mary2al]

OK Guys -- this MacGivers it! Congrats -- Now could you please specify a switch, diode and cables?
Thanks!!

[patsparks]

A diode from an alternator There are 6 in each and almost any switch which you can mount up, a simple toggle or push pull with an indicator light a battery from an emergency exit light should do the job and cables I'm not sure, 4mm maybe? Best to include an in line fuse too.

[okiebutnotfrommuskogee]

Originally Posted by patsparks

A diode from an alternator There are 6 in each and almost any switch which you can mount up, a simple toggle or push pull with an indicator light a battery from an emergency exit light should do the job and cables I'm not sure, 4mm maybe? Best to include an in line fuse too.

Just a comment, Since your everyday voltage in Australia is 240 volts, maybe your exit lights use 12 volt batteries. The ones I have experience with here in the US (the ones at our place of business) all use 6 volt batteries, except the newest ones and they use leds and little bitty batteries.

At first, I was going to use an 8 amp hour battery that I thought was small enough to go in the "secret drawer", but it was a little too big. So my second choice was the 12 amp hour one that I put in the left rear cubby. I usually have an extra one or two of that size around anyway because my electric bicycles use two of them in series for 24 volts. I also have a couple of back-up computer power supplies that use them.

It is good to know that it is charged up and back there "just in case".

[patsparks]

Yes our emergency exit signs are 12 volt at work anyway. Don't know if it's to do with the 240 volt mains or if it's just an Aussie thing.

I'm no expert on this stuff though.

[fruzzetti]

Originally Posted by okiebutnotfrommuskogee

Just a comment, Since your everyday voltage in Australia is 240 volts, maybe your exit lights use 12 volt batteries. The ones I have experience with here in the US (the ones at our place of business) all use 6 volt batteries, except the newest ones and they use leds and little bitty batteries.

At first, I was going to use an 8 amp hour battery that I thought was small enough to go in the "secret drawer", but it was a little too big. So my second choice was the 12 amp hour one that I put in the left rear cubby. I usually have an extra one or two of that size around anyway because my electric bicycles use two of them in series for 24 volts. I also have a couple of back-up computer power supplies that use them.

It is good to know that it is charged up and back there "just in case".

Wow. That's weird; I need two new high amp-hour 12V lead acid batteries for my UPS systems; every time the power flickers I lose my server, firewall, router, desktop PC. The only machines that survive it are my wife's and my portable computers and, oddly, my wife's desktop PC.

Wheelchair batteries are up on account of the recently increased lead prices. Anyone got an idea where I can get a 15-45Ah battery under $150?

~ dan ~

[okiebutnotfrommuskogee]

Originally Posted by fruzzetti

Wow. That's weird; I need two new high amp-hour 12V lead acid batteries for my UPS systems; every time the power flickers I lose my server, firewall, router, desktop PC. The only machines that survive it are my wife's and my portable computers and, oddly, my wife's desktop PC.

Wheelchair batteries are up on account of the recently increased lead prices. Anyone got an idea where I can get a 15-45Ah battery under $150?

~ dan ~

Your ups is much bigger than the two I was referring to. I also have a larger one that uses two 18 amp hour 12 volt batteries in series to produce 24 volts. It is currently taking care of two computers and a couple of printers. Don't know about where to find the big ones you need cheap. I get the ones I need on ebay about half the time and locally the other times.

[fruzzetti]

Originally Posted by okiebutnotfrommuskogee

Your ups is much bigger than the two I was referring to. I also have a larger one that uses two 18 amp hour 12 volt batteries in series to produce 24 volts. It is currently taking care of two computers and a couple of printers. Don't know about where to find the big ones you need cheap. I get the ones I need on ebay about half the time and locally the other times.

Boy, is that too bad. Actually, I bet the UPS is no bigger than what you refer to:

This is just... how I roll. The word 'MacGyver' reminded me.

~ dan ~