On Fri, Dec 29, 2023 at 02:36:00AM -0800, Russell Senior wrote:
... UPS ...
> Does anyone have recent experience, either positive or negative, and/or
> any advice on replacements. I'd consider a used older model.
Since computation equals dodopaddle (er "smart phone") for
most of My Fellow Ameri
On Saturday, December 30th, 2023 at 12:15 AM, Keith Lofstrom
wrote:
> ...
>
> A nearer term goal is to replace all the hard drives in the
> house with Samsung terabyte SSDs. My test machines suspend
> to SSD in less than two seconds, and reboot in ten.
>
Suspend doesn't save to your SSD. You
Google 24v inverter there are boat loads of them for 24v PV systems.
Ranging from 300W on up.
https://www.amazon.com/24-volt-pure-sine-wave-inverter/s?k=24+volt+pure+sine+wave+inverter
If you are planning on running computers
and whatnot get a sine wave inverter, many switched PSU's do not like
mod
No they won't since like most things there is still a need - it's just a
need by professionals who know what the hell they are doing.
So yeah, the El-Crapo BackUPSes that look like a messed up power strip with
micro-sized batteries and no management ports that keep
The PC up long enough for the us
On 12/30/23 09:30, Chuck Hast wrote:
Google 24v inverter there are boat loads of them for 24v PV systems.
Ranging from 300W on up.
https://www.amazon.com/24-volt-pure-sine-wave-inverter/s?k=24+volt+pure+sine+wave+inverter
If you are planning on running computers
and whatnot get a sine wave invert
Thanks, MC_SEQUOIA for the explanation.
My assumption was that HTTPS encrypts the messages between the client
browser and server, so one cannot just eavesdrop on the messages back and
forth to generate a map of how to intercept and change the messages. Of
course, one would have to gain access to
I am not sure you would have to check on each manufacturer, the best ones
are on line double conversion
the power goes through the UPS, it is rectified, the battery floats on it
and the DC feeds an inverter so that
the load never sees mains power. The rest of them are some form of
standby/offline U
APC BackUPS are modified sine wave and there is no issue with them and your
garden variety Dell or HP desktop, but of course you are taking your chances
with anything high quality on them.
APC SmartUPSes are pure sine wave. They are more expensive.
APC makes all of this very clear in their doc
The problem with generators is that the frequency is dependent on how fast the
rotor spins and the second you put an electrical load on
A generator you increase the magnetic field resistance to the armature and the
generator slows down.
When the generator is the size of a barn at Bonneville Dam
On 12/30/23 15:29, Chuck Hast wrote:
I am not sure you would have to check on each manufacturer, the best ones
are on line double conversion
the power goes through the UPS, it is rectified, the battery floats on it
and the DC feeds an inverter so that
the load never sees mains power. The rest of
On 12/30/23 16:00, Ted Mittelstaedt wrote:
The problem with generators is that the frequency is dependent on how fast the
rotor spins and the second you put an electrical load on
A generator you increase the magnetic field resistance to the armature and the
generator slows down.
When the gener
Many laptops have some sort of stereo audio input jack.
I can imagine a resistor+capacitor kludge that
attenuates the "hot" and "neutral" legs of a power
cord down to the stereo input levels.
A program on the laptop captures hot and neutral voltage
waveforms, differences them, and (somehow) uses
Wrap about 20-30 turns of wire around one leg of the AC power line and
connect both sides to a scope and you have an inductive powerline
oscilloscope. Much safer than resistors and capacitors.
Also:
$32.00 off Amazon:
MINIWARE Pocket Oscilloscope DS211, Portable Oscilloscope Mini Size
Handheld,
Interesting I have a smaller 5000k Generac, gasoline powered also. But it's
old-school with the generator output directly feeding single phase 240 power.
It runs at 3600rpm and the armature is a 2 pole so the formula yields 60Hz
Small generator power is actually -very- clean far cleaner than uti
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