|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
148.87.19.206
No, not Cats sleeping atop each other.
What is the best way to size lead-acid batteries to directly power electronics??
I am thinking about 8Ah is a good thing to shoot for per couple of amps used, which gives me a working range of 4 hours at a time. Is that all there is to it?
Follow Ups:
I would encourage you to look at other batteries-
Rolls is an old firm that has specialized in delivering deep cycle units for off-grid applications and battery assisted back-up power applications-
A quick look at their selector tool indicates some 8 Volt units...
Happy Listening
It seemed like a tall order to build a battery power supply and keep it going. I would probably forget it on and drain the batteries.
I intend to keep both AC and Battery power. I've ordered a relay-switch controller for about $10 from China. I'll grow old waiting for it to arrive.
My plan is to have one button for A/C power, one button for Battery power, and battery power will switch to A/C after some time limit, maybe an hour. I don't know if I'll be able to do all that with just a $10 circuit.
I will use the Sears DieHard for the battery power source, which has it's own charging circuit, but you have to plug it in at intervals, hopefully just once a week.
Don't assume that batteries are noise free power sources:
http://www.tnt-audio.com/clinica/regulators_noise4_e.html
That's interesting. So, they are not perfect, but, perhaps, much better than using AC directly.Anyway, the Diehard battery sounded pretty good into a regulator delivering 10 volts. It must be a 500 Amps peak battery, > 100 Ahs, too.
I will see how I tolerate going back to AC now.Thinking about this a little more. Those diehards are the best there is.
Edits: 05/09/15 05/09/15
You've got to account for (loss of) dynamics and voltage sag during their use as the batteries weaken and so on. Non regulated. Fidelity will suffer. Figuring a current drain of X will last Y length is only a part of the conjurin' as I see it. Too much battery is almost never bad. Test and see and monitor voltage as you use it. Analog meter is better or a dig. that emanates that properly.
E
T
Edits: 05/08/15
But without much voltage drop. I tried 12-volt to 10-volt, and 9-volt would be fine, too for one unit. I just don't have the experience to know how much voltage drop will occur. I also need some + and - 15 volts, which I can get from 12v + 6v battery.
Right now, I can be set with a carry around portable Sears battery that can charge itself! That will take care of my simple, one-voltage DAC unit.
For the phono stage, I wish they made 18-volt batteries!
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: