Today's Message Index:
----------------------
1. 10:43 AM - Re: PASS-THROUGH CHARGER (Rick Beebe)
2. 01:52 PM - Re: PASS-THROUGH CHARGER (Robert L. Nuckolls, III)
3. 01:57 PM - Re: PASS-THROUGH CHARGER (correction) (Robert L. Nuckolls, III)
4. 04:41 PM - Re: PASS-THROUGH CHARGER (Tim Shankland)
5. 05:16 PM - Re: PASS-THROUGH CHARGER (Alec Myers)
6. 06:57 PM - Re: PASS-THROUGH CHARGER (FLYaDIVE)
7. 10:40 PM - Re: PASS-THROUGH CHARGER (Alec Myers)
Message 1
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| Subject: | Re: PASS-THROUGH CHARGER |
There was quite a discussion on the Stratux Reddit page about the hunt
for a battery that could be charging at the same time it was in use. I
don't remember what the consensus was, now, but that's another option to
look for. That said, I, like the other folks here, just have mine
plugged into a USB power supply connected to my avionics bus. Haven't
had any issues with file system corruption yet.
--Rick
On 10/3/2018 2:29 PM, FLYaDIVE wrote:
> Electronics should be making our life and flying easier not more
> complicated.
> I have a Raspberry Pi (RPi) configured for ADS-B In and WX.
> It is displaying the information on a iPad and so far it seams to be
> working fine.
> The unit is hooked to an external belly mounted antenna for the ADS-B
> In and an internal antenna for WX.
> At some point I hope to install an external antenna for that also.
> Here is the frustrating part:
> The RPi requires a power source that is a battery. I have battery
> that is suppose to store 12,000 mA.
> Yeah, well, I'll believe that when it runs for 34 Hours without
> requiring a charge.
> So, here is the rub... I am getting tired of climbing in back of the
> plane to Install and Remove the battery for Charging and to remember
> to charg the battery and bring it back to the plane and hook it back
> up... Well, you get the idea!!!
>
Message 2
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| Subject: | Re: PASS-THROUGH CHARGER |
At 12:41 PM 10/5/2018, you wrote:
>There was quite a discussion on the Stratux
>Reddit=C2 page about the hunt for a battery that
>could be charging at the same time it was in
>use. I don't remember what the consensus was,
>now, but that's another option to look for. That
>said, I, like the other folks here, just have
>mine plugged into a USB power supply connected
>to my avionics bus. Haven't had any issues with file system corruption yet.
Such a battery would be no different functionally
than the ship's battery in your airplane, or the
battery in any other vehicle.
Any secondary (rechargeable) battery takes on
energy at some voltage level higher than
where it delivers energy. One could consider
crafting a 3 stack array of LiFePO cells
which will top off at about 12.0 volts.
A charger and cell-balancing system could
be crafted to tap ship's bus voltage
for battery charging. Downstream of that
you incorporate a dc/dc down-converter to
deliver 5.0 plus/minus 0.1 volts to the
system.
The dc/dc converter doesn't care if the
battery is being charged or not. Similarly,
the battery charger doesn't care if the
battery is loaded . . . or not. One would
want to include low voltage shut down for
the dc/dc converter if the array of cells
drops below 3 volts/cell.
I suspect this narrative pretty much
describes the stand-by battery product
we were talking about a couple weeks ago.
Bob . . .
Message 3
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| Subject: | Re: PASS-THROUGH CHARGER (correction) |
> One could consider
> crafting a 3 stack array of LiFePO cells
> which will top off at about 11.4 volts.
Bob . . .
Message 4
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| Subject: | Re: PASS-THROUGH CHARGER |
I have followed this thread for some time. What is missing is what I
found to be the problem. The approximately 2 amps of current necessary
at start up cannot be supplied by most usb micro cables. I tried several
with poor results. I finally bought the mico usb plugs and used a larger
wire and thus did not experience the voltage drop. This is what I am
using now with no problems.
Tim Shankland
From: Robert L. Nuckolls, III
Sent: Friday, October 05, 2018 4:51 PM
Subject: Re: AeroElectric-List: PASS-THROUGH CHARGER
At 12:41 PM 10/5/2018, you wrote:
There was quite a discussion on the Stratux Reddit=C2 page about the
hunt for a battery that could be charging at the same time it was in
use. I don't remember what the consensus was, now, but that's another
option to look for. That said, I, like the other folks here, just have
mine plugged into a USB power supply connected to my avionics bus.
Haven't had any issues with file system corruption yet.
Such a battery would be no different functionally
than the ship's battery in your airplane, or the
battery in any other vehicle.
Any secondary (rechargeable) battery takes on
energy at some voltage level higher than
where it delivers energy. One could consider
crafting a 3 stack array of LiFePO cells
which will top off at about 12.0 volts.
A charger and cell-balancing system could
be crafted to tap ship's bus voltage
for battery charging. Downstream of that
you incorporate a dc/dc down-converter to
deliver 5.0 plus/minus 0.1 volts to the
system.
The dc/dc converter doesn't care if the
battery is being charged or not. Similarly,
the battery charger doesn't care if the
battery is loaded . . . or not. One would
want to include low voltage shut down for
the dc/dc converter if the array of cells
drops below 3 volts/cell.
I suspect this narrative pretty much
describes the stand-by battery product
we were talking about a couple weeks ago.
Bob . . .
Message 5
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| Subject: | Re: PASS-THROUGH CHARGER |
You can=99t charge a battery at the same time as it is =9Cin use
=9D.
A battery is a two terminal device: either you are pushing current into it, i
n which case you=99re charging it, or you=99re withdrawing curre
nt, in which case you=99re =9Cusing=9D it.
If the terminal voltage is higher than the sum of the series cell voltages t
hen current will flow into the battery. If the terminal voltage is lower tha
n the sum of the cell voltages then current is being withdrawn. It can
=99t be both at the same time.
On Oct 5, 2018, at 13:41, Rick Beebe <rick@beebe.org> wrote:
There was quite a discussion on the Stratux Reddit page about the hunt for a
battery that could be charging at the same time it was in use. I don't reme
mber what the consensus was, now, but that's another option to look for. Tha
t said, I, like the other folks here, just have mine plugged into a USB powe
r supply connected to my avionics bus. Haven't had any issues with file syst
em corruption yet.
--Rick
> On 10/3/2018 2:29 PM, FLYaDIVE wrote:
> Electronics should be making our life and flying easier not more complicat
ed.
> I have a Raspberry Pi (RPi) configured for ADS-B In and WX.
> It is displaying the information on a iPad and so far it seams to be worki
ng fine.
> The unit is hooked to an external belly mounted antenna for the ADS-B In a
nd an internal antenna for WX.
> At some point I hope to install an external antenna for that also.
> Here is the frustrating part:
> The RPi requires a power source that is a battery. I have battery that is
suppose to store 12,000 mA.
> Yeah, well, I'll believe that when it runs for 34 Hours without requiring a
charge.
> So, here is the rub... I am getting tired of climbing in back of the plan
e to Install and Remove the battery for Charging and to remember to charg th
e battery and bring it back to the plane and hook it back up... Well, you g
et the idea!!!
>
Message 6
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| Subject: | Re: PASS-THROUGH CHARGER |
Alec:
If that was the case then how do all the planes out there charge their
batteries while flying and how do ALL the cars out there charge their
batteries while driving?
The answer is very simple:
The Charge Voltage and Current is MORE that the System Drain.
The charge voltage has to be 13.8 to 14.2/5 VDC.
The system on most planes is only 12 VDC (Battery Voltage) or LESS!
Yes, there are 24 V systems.
Your explanation is 99% correct, BUT! The battery is in PARALLEL with the
load, so as long as the supply is higher than the load the battery will
charge. The load will run off the Alternator via the ACU.
Barry
On Fri, Oct 5, 2018 at 8:20 PM Alec Myers <alec@alecmyers.com> wrote:
> You can=99t charge a battery at the same time as it is =9Cin
use=9D.
>
> A battery is a two terminal device: either you are pushing current into
> it, in which case you=99re charging it, or you=99re withdrawi
ng current, in
> which case you=99re =9Cusing=9D it.
>
> If the terminal voltage is higher than the sum of the series cell voltage
s
> then current will flow into the battery. If the terminal voltage is lower
> than the sum of the cell voltages then current is being withdrawn. It can
=99t
> be both at the same time.
>
>
> On Oct 5, 2018, at 13:41, Rick Beebe <rick@beebe.org> wrote:
>
> There was quite a discussion on the Stratux Reddit page about the hunt
> for a battery that could be charging at the same time it was in use. I
> don't remember what the consensus was, now, but that's another option to
> look for. That said, I, like the other folks here, just have mine plugged
> into a USB power supply connected to my avionics bus. Haven't had any
> issues with file system corruption yet.
>
> --Rick
>
> On 10/3/2018 2:29 PM, FLYaDIVE wrote:
>
> Electronics should be making our life and flying easier not more
> complicated.
> I have a Raspberry Pi (RPi) configured for ADS-B In and WX.
> It is displaying the information on a iPad and so far it seams to be
> working fine.
> The unit is hooked to an external belly mounted antenna for the ADS-B In
> and an internal antenna for WX.
> At some point I hope to install an external antenna for that also.
> Here is the frustrating part:
> The RPi requires a power source that is a battery. I have battery that i
s
> suppose to store 12,000 mA.
> Yeah, well, I'll believe that when it runs for 34 Hours without requiring
> a charge.
> So, here is the rub... I am getting tired of climbing in back of the
> plane to Install and Remove the battery for Charging and to remember to
> charg the battery and bring it back to the plane and hook it back up...
> Well, you get the idea!!!
>
>
Message 7
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| Subject: | Re: PASS-THROUGH CHARGER |
Because while the battery is charging, it=99s not being =9Cused
=9D.
While the battery is being charged, the power to drive the instruments or ot
her load that is connected in parallel with the battery, is not coming from t
he battery.
Charging, or being used. One or the other, at any moment, but not both.
On Oct 5, 2018, at 21:51, FLYaDIVE <flyadive@gmail.com> wrote:
Alec:
If that was the case then how do all the planes out there charge their batte
ries while flying and how do ALL the cars out there charge their batteries w
hile driving?
The answer is very simple:
The Charge Voltage and Current is MORE that the System Drain.
The charge voltage has to be 13.8 to 14.2/5 VDC.
The system on most planes is only 12 VDC (Battery Voltage) or LESS!
Yes, there are 24 V systems.
Your explanation is 99% correct, BUT! The battery is in PARALLEL with the l
oad, so as long as the supply is higher than the load the battery will charg
e. The load will run off the Alternator via the ACU.
Barry
> On Fri, Oct 5, 2018 at 8:20 PM Alec Myers <alec@alecmyers.com> wrote:
> You can=99t charge a battery at the same time as it is =9Cin u
se=9D.
>
> A battery is a two terminal device: either you are pushing current into it
, in which case you=99re charging it, or you=99re withdrawing cu
rrent, in which case you=99re =9Cusing=9D it.
>
> If the terminal voltage is higher than the sum of the series cell voltages
then current will flow into the battery. If the terminal voltage is lower t
han the sum of the cell voltages then current is being withdrawn. It can
=99t be both at the same time.
>
>
>
>
>
> On Oct 5, 2018, at 13:41, Rick Beebe <rick@beebe.org> wrote:
>
> There was quite a discussion on the Stratux Reddit page about the hunt fo
r a battery that could be charging at the same time it was in use. I don't r
emember what the consensus was, now, but that's another option to look for. T
hat said, I, like the other folks here, just have mine plugged into a USB po
wer supply connected to my avionics bus. Haven't had any issues with file sy
stem corruption yet.
>
> --Rick
>
>
>> On 10/3/2018 2:29 PM, FLYaDIVE wrote:
>> Electronics should be making our life and flying easier not more complica
ted.
>> I have a Raspberry Pi (RPi) configured for ADS-B In and WX.
>> It is displaying the information on a iPad and so far it seams to be work
ing fine.
>> The unit is hooked to an external belly mounted antenna for the ADS-B In a
nd an internal antenna for WX.
>> At some point I hope to install an external antenna for that also.
>> Here is the frustrating part:
>> The RPi requires a power source that is a battery. I have battery that i
s suppose to store 12,000 mA.
>> Yeah, well, I'll believe that when it runs for 34 Hours without requiring
a charge.
>> So, here is the rub... I am getting tired of climbing in back of the pla
ne to Install and Remove the battery for Charging and to remember to charg t
he battery and bring it back to the plane and hook it back up... Well, you
get the idea!!!
>>
>
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