Today's Message Index:
----------------------
1. 04:08 AM - Re: Battery charger / power supply (Art Zemon)
2. 07:56 AM - Re: Re: Inexpensive voltage data logger (Robert L. Nuckolls, III)
3. 08:02 AM - Re: Battery charger / power supply (Charlie England)
4. 08:10 AM - Re: Battery charger / power supply (Robert L. Nuckolls, III)
5. 08:23 AM - Re: Battery charger / power supply (Art Zemon)
6. 08:32 AM - Re: Battery charger / power supply (Art Zemon)
7. 08:36 AM - Re: Battery charger / power supply (Sebastien)
8. 09:12 AM - Re: Battery charger / power supply (Charlie England)
9. 11:31 PM - Re: Flush Cutting Cable Ties (KentMarshall11)
Message 1
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Subject: | Re: Battery charger / power supply |
Having gotten home from dinner (so I'm no longer surfing the HF website on
my phone) and slept (so I'm more rational), I reread the Batteries chapter
of the AEC. Based on what I read this morning, it is time for me to buy the
battery(ies) for my plane and a trickle charger. I'll let the battery
supply the higher current for testing the panel and then let the charger
replenish the battery at a lower current.
Cheers,
-- Art Z.
--
https://CheerfulCurmudgeon.com/
*"If I am not for myself, who is for me? And if I am only for myself, what
am I? And if not now, when?" Hillel*
Message 2
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Subject: | Re: Inexpensive voltage data logger |
At 05:25 PM 10/22/2017, you wrote:
>
>Le 21/10/2017 =E0 08:32, Eric Page a =E9crit :
>>
>>I've played around with one of these a bit and it seemed to work quite
well.
>>
>>http://preview.tinyurl.com/ya7pg9sg
Agreed. I've got a couple of these in the toolbox.
The really attractive feature (besides price) is
the graphical user interface software.
Building a piece of hardware to sample analog
data, convert it to numbers and spit it out for
recording or display is a trivial task. Signal
conditioning the real world stimulus for presentation
to the analog conversion is a bit more complex.
Then, once you've collected a 'pile of numbers', you
need to convert them into their real-world significance.
Here's a typical data file from a task I did at Beech.
First column is time of day to the second . . . followed
by 20 columns of values between 0 and 4095 (0 = 0V at the
input the the analog to digital converter; 4095
4,095 millivolts at the input). The a/d also resolves
polarity of the signal so you see one column with a minus
sign on the numbers.
Emacs!
After boring holes in the sky and smoking off a few hundred
gallons of fuel, you go back to the desk and convert all these
numbers into interpretable displays . . . my favorite at the time
was to craft utilities in TurboBasic to put offset and scale
factors on the numbers which were then spit out as script files
that plotted pretty lines onto graphing templates in AudoCAD.
The work product comes out looking like this
Emacs!
I've also used Excel to good advantage to produce similar
plots.
Emacs!
Sometimes, the thing you're looking for cannot be
observed and resolved in terms of numbers. For
example . . .
Emacs!
Here's a picture of 'tracks in the snow' taken
from the surface of a position feedback potentiometer
in an actuator. The thing would mis-behave on
descent from altitude. Turns out that warm, moist
air pushed into a cold-soaked actuator with increasing
atmospheric pressure would cause condensation and
frost on the surface of the pot . . . disrupting
its functionality.
As the pot wiper stroked the length of the pot,
the fingers would plow little tracks in the frost.
That was a challenging investigation. The video camera
wouldn't work at those low temperatures . . . had to
strap a power resistor to the side of the camera
housing along with a temperature sensor and controller
to maintain the camera at about 10C.
The point to be pondered here is that a search for
knowledge is usually much bigger than simply identifying
the gizmo to shoot a stream of numbers into an thumb
drive or onto your hard drive.
Getting the physical phenomenon conditioned into voltages
within the input range of the A/D is the 'front end'
task . . . the unpacking the numbers for interpretable
display is yet another task.
Paul and I have pondered this problem . . . and stirred up
some ideas to craft a data acquisition system
easily tailored to the kinds of investigations useful
on OBAM aircraft. Tools that minimize the
user's time, talents and resources for input conditioning
and output interpretation.
This little iCP12 module cited above with it's included
graphical interface is a really big jump in the right
direction. We're going to see if we can take it a bit
further yet.
Bob . . .
Message 3
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Subject: | Re: Battery charger / power supply |
On 10/23/2017 6:06 AM, Art Zemon wrote:
> Having gotten home from dinner (so I'm no longer surfing the HF
> website on my phone) and slept (so I'm more rational), I reread the
> Batteries chapter of the AEC. Based on what I read this morning, it is
> time for me to buy the battery(ies) for my plane and a trickle
> charger. I'll let the battery supply the higher current for testing
> the panel and then let the charger replenish the battery at a lower
> current.
>
> Cheers,
> -- Art Z.
>
> --
> https://CheerfulCurmudgeon.com/
>
> /"If I am not for myself, who is for me? And if I am only for myself,
> what am I? And if not now, when?" Hillel/
I'm getting the impression that we might be talking about leaving the
charger on the battery all the time. There's a lot of empirical evidence
for that being a bad idea, even with a 'smart' 'maintainer' style
charger. AGM batteries have very little self-discharge over time, so
they don't need to be 'maintained'. As an example, my 4+ year old AGM
battery in my RV-4 often sits for over a month without being flown, but
it starts the plane just fine after sitting. On the other hand, there
have been numerous posts on this and other lists/forums by people who've
left a 'smart maintainer' style charger hooked to their AGM battery and
had the battery die a very premature death. It's extremely rare to hear
about early death when the battery is just used normally.
Charlie
---
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Message 4
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Subject: | Re: Battery charger / power supply |
At 06:06 AM 10/23/2017, you wrote:
>Having gotten home from dinner (so I'm no longer surfing the HF
>website on my phone) and slept (so I'm more rational), I reread the
>Batteries chapter of the AEC. Based on what I read this morning, it
>is time for me to buy the battery(ies) for my plane and a trickle
>charger. I'll let the battery supply the higher current for testing
>the panel and then let the charger replenish the battery at a lower current.
That will work. My current favorites for $value$ in
small charger/maintainers are the Schumacher SEMI1562A
http://tinyurl.com/y8o3ryb5
or Battery Tender Jr
http://tinyurl.com/y8dzte5o
I have both of these products in service
in my shop and I have installed them on
farm equipment for several friends.
Left plugged in and connected to your
ship's battery at all times, you can use
the battery for short interval testing
(say 30 minutes to a hour) in the battery-
only, endurance mode. The charger will
have the battery topped back off by
the next morning.
The Schumacher has about 2x the output of the
Battery Tender so it will top off a bit
quicker . . . but both will do the job.
For extended ground ops on the airplane,
consider something like this:
http://tinyurl.com/ycg5uuf3
This can be floated across the ship's
battery but should not be used to charge
a depleted battery.
Bob . . .
Message 5
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Subject: | Re: Battery charger / power supply |
Charlie,
For now, I will use the battery for testing the electrical devices in the
plane while I am assembling it. I will use the charger to recharge the
battery since the plane does not (yet) have an engine.
-- Art Z.
On Mon, Oct 23, 2017 at 10:05 AM, Charlie England <ceengland7@gmail.com>
wrote:
> On 10/23/2017 6:06 AM, Art Zemon wrote:
>
> Having gotten home from dinner (so I'm no longer surfing the HF website on
> my phone) and slept (so I'm more rational), I reread the Batteries chapter
> of the AEC. Based on what I read this morning, it is time for me to buy the
> battery(ies) for my plane and a trickle charger. I'll let the battery
> supply the higher current for testing the panel and then let the charger
> replenish the battery at a lower current.
>
> Cheers,
> -- Art Z.
>
> --
> https://CheerfulCurmudgeon.com/
>
> *"If I am not for myself, who is for me? And if I am only for myself, what
> am I? And if not now, when?" Hillel*
>
> I'm getting the impression that we might be talking about leaving the
> charger on the battery all the time. There's a lot of empirical evidence
> for that being a bad idea, even with a 'smart' 'maintainer' style charger.
> AGM batteries have very little self-discharge over time, so they don't need
> to be 'maintained'. As an example, my 4+ year old AGM battery in my RV-4
> often sits for over a month without being flown, but it starts the plane
> just fine after sitting. On the other hand, there have been numerous posts
> on this and other lists/forums by people who've left a 'smart maintainer'
> style charger hooked to their AGM battery and had the battery die a very
> premature death. It's extremely rare to hear about early death when the
> battery is just used normally.
>
> Charlie
>
>
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon> Virus-free.
> www.avast.com
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> <#m_6940801807452127696_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>
--
https://CheerfulCurmudgeon.com/
*"If I am not for myself, who is for me? And if I am only for myself, what
am I? And if not now, when?" Hillel*
Message 6
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Subject: | Re: Battery charger / power supply |
On Mon, Oct 23, 2017 at 10:09 AM, Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> At 06:06 AM 10/23/2017, you wrote:
>
> Having gotten home from dinner (so I'm no longer surfing the HF website o
n
> my phone) and slept (so I'm more rational), I reread the Batteries chapte
r
> of the AEC. Based on what I read this morning, it is time for me to buy t
he
> battery(ies) for my plane and a trickle charger. I'll let the battery
> supply the higher current for testing the panel and then let the charger
> replenish the battery at a lower current.
>
>
> That will work. My current favorites for $value$ in
> small charger/maintainers are the Schumacher SEMI1562A
>
> http://tinyurl.com/y8o3ryb5
>
> or Battery Tender Jr
>
> http://tinyurl.com/y8dzte5o
>
> I have both of these products in service
> in my shop and I have installed them on
> farm equipment for several friends.
>
> Left plugged in and connected to your
> ship's battery at all times, you can use
> the battery for short interval testing
> (say 30 minutes to a hour) in the battery-
> only, endurance mode. The charger will
> have the battery topped back off by
> the next morning.
>
>
=8BYup. That's exactly what I have in mind. I won't have the big-curr
ent
stuff turned on at all. Radios won't be transmitting. Lights won't be on
more than momentarily. Pitot heat not on. Etc.
Cheers,
-- Art Z.=8B
--
https://CheerfulCurmudgeon.com/
*"If I am not for myself, who is for me? And if I am only for myself, what
am I? And if not now, when?" Hillel*
Message 7
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Subject: | Re: Battery charger / power supply |
Charlie, I'm not sure "starts the plane just fine" is a good metric of batte
ry health. This summer my one year old AGM battery started the plane fine 3 t
imes in one day right before it self discharged to 10V in 4 days.
Sebastien
> On Oct 23, 2017, at 08:05, Charlie England <ceengland7@gmail.com> wrote:
>
>> On 10/23/2017 6:06 AM, Art Zemon wrote:
>> Having gotten home from dinner (so I'm no longer surfing the HF website o
n my phone) and slept (so I'm more rational), I reread the Batteries chapter
of the AEC. Based on what I read this morning, it is time for me to buy the
battery(ies) for my plane and a trickle charger. I'll let the battery suppl
y the higher current for testing the panel and then let the charger replenis
h the battery at a lower current.
>>
>> Cheers,
>> -- Art Z.
>>
>> --
>> https://CheerfulCurmudgeon.com/
>>
>> "If I am not for myself, who is for me? And if I am only for myself, what
am I? And if not now, when?" Hillel
> I'm getting the impression that we might be talking about leaving the char
ger on the battery all the time. There's a lot of empirical evidence for tha
t being a bad idea, even with a 'smart' 'maintainer' style charger. AGM batt
eries have very little self-discharge over time, so they don't need to be 'm
aintained'. As an example, my 4+ year old AGM battery in my RV-4 often sits f
or over a month without being flown, but it starts the plane just fine after
sitting. On the other hand, there have been numerous posts on this and othe
r lists/forums by people who've left a 'smart maintainer' style charger hook
ed to their AGM battery and had the battery die a very premature death. It's
extremely rare to hear about early death when the battery is just used norm
ally.
>
> Charlie
>
> Virus-free. www.avast.com
Message 8
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Subject: | Re: Battery charger / power supply |
No argument to the bare statement, but it's barely tangential to the
subject at hand. And nowhere near enough data to know what happened to
yours. Did you leave it on a trickle charger all the time? Was the charging
system in your a/c working properly? Was your battery defective?
I had one that died after about the same length of time. When I pulled the
cowl to check it, there was a pinhole in the side of the battery; obviously
done in shipping (or in the plant) almost a year earlier. It had been
slowly puking acid vapors out that 'vent' since new. Worked fine until it
didn't.
On Mon, Oct 23, 2017 at 10:35 AM, Sebastien <cluros@gmail.com> wrote:
> Charlie, I'm not sure "starts the plane just fine" is a good metric of
> battery health. This summer my one year old AGM battery started the plane
> fine 3 times in one day right before it self discharged to 10V in 4 days.
>
> Sebastien
>
> On Oct 23, 2017, at 08:05, Charlie England <ceengland7@gmail.com> wrote:
>
> On 10/23/2017 6:06 AM, Art Zemon wrote:
>
> Having gotten home from dinner (so I'm no longer surfing the HF website on
> my phone) and slept (so I'm more rational), I reread the Batteries chapter
> of the AEC. Based on what I read this morning, it is time for me to buy the
> battery(ies) for my plane and a trickle charger. I'll let the battery
> supply the higher current for testing the panel and then let the charger
> replenish the battery at a lower current.
>
> Cheers,
> -- Art Z.
>
> --
> https://CheerfulCurmudgeon.com/
>
> *"If I am not for myself, who is for me? And if I am only for myself, what
> am I? And if not now, when?" Hillel*
>
> I'm getting the impression that we might be talking about leaving the
> charger on the battery all the time. There's a lot of empirical evidence
> for that being a bad idea, even with a 'smart' 'maintainer' style charger.
> AGM batteries have very little self-discharge over time, so they don't need
> to be 'maintained'. As an example, my 4+ year old AGM battery in my RV-4
> often sits for over a month without being flown, but it starts the plane
> just fine after sitting. On the other hand, there have been numerous posts
> on this and other lists/forums by people who've left a 'smart maintainer'
> style charger hooked to their AGM battery and had the battery die a very
> premature death. It's extremely rare to hear about early death when the
> battery is just used normally.
>
> Charlie
>
>
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon> Virus-free.
> www.avast.com
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link>
> <#m_-3109937323447436738_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>
>
Message 9
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Subject: | Re: Flush Cutting Cable Ties |
Flush slicing cable Ties is sufficient to confront copper and steel wire and it
cuts squarer in impenetrable things being sloped on the two borders. Flush cutters
are slanted on the inward crosswise just and are for the most part a well
obligation undertaking.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=473833#473833
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