A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Soaring
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Battery question



 
 
Thread Tools Display Modes
  #11  
Old June 21st 20, 04:48 PM posted to rec.aviation.soaring
[email protected]
external usenet poster
 
Posts: 465
Default Battery question

On Sunday, June 21, 2020 at 11:42:58 AM UTC-4, kinsell wrote:
On 6/21/20 8:18 AM, wrote:
On Sunday, June 21, 2020 at 12:13:51 AM UTC-4, SoaringXCellence wrote:
Another item on your list has a very high current draw: The Stratux is based on a Raspberry Pi and those have more current draw than most of the rest of your panel!

I have a 15000mAh LimeFuel external pack I run with my Stratux (Pi 3 based). It goes too low for effective operation of the Pi in about 4.5 hours.. The spec for the Pi says it needs a 2.5 Amp 5-volt power supply.

But I have found that some of the Pi devices have lower current needs, and especially if you are making your own Stratux, you should check out a few different units and pick the one with the lowest power draw.

The Stratux software will run on a Pi 2 or 3. The Pi 4 is definitely over kill and uses the most power of the bunch.

Mike




Talking about watt-hours, a "12V" LFP battery outputs 13.x volts through most of its discharge, thus outputs somewhat more watt-hours than an SLA that yields the same amp-hours. Most of our modern avionics use less current when fed a higher voltage, very unlike ye olde light bulb. I've measured that behavior in my Portable PowerFLARM, for example.


The OP said he was using a 14 volt SLA, which I suppose proves how he
absolutely must use SLA.


- not necessarily. Some of the older radios misbehaved when the "12V" SLAs were depleted down to under 12V. So people used 7-cell "14V" SLAs. With the LFP batteries maintaining above 13V through their discharge, I believe those 14V SLAs can be abandoned. Not to mention that very few of those old balky radios are still in service.
Ads
  #12  
Old June 22nd 20, 03:52 AM posted to rec.aviation.soaring
2G
external usenet poster
 
Posts: 1,439
Default Battery question

On Sunday, June 21, 2020 at 8:48:18 AM UTC-7, wrote:
On Sunday, June 21, 2020 at 11:42:58 AM UTC-4, kinsell wrote:
On 6/21/20 8:18 AM, wrote:
On Sunday, June 21, 2020 at 12:13:51 AM UTC-4, SoaringXCellence wrote:
Another item on your list has a very high current draw: The Stratux is based on a Raspberry Pi and those have more current draw than most of the rest of your panel!

I have a 15000mAh LimeFuel external pack I run with my Stratux (Pi 3 based). It goes too low for effective operation of the Pi in about 4.5 hours. The spec for the Pi says it needs a 2.5 Amp 5-volt power supply.

But I have found that some of the Pi devices have lower current needs, and especially if you are making your own Stratux, you should check out a few different units and pick the one with the lowest power draw.

The Stratux software will run on a Pi 2 or 3. The Pi 4 is definitely over kill and uses the most power of the bunch.

Mike



Talking about watt-hours, a "12V" LFP battery outputs 13.x volts through most of its discharge, thus outputs somewhat more watt-hours than an SLA that yields the same amp-hours. Most of our modern avionics use less current when fed a higher voltage, very unlike ye olde light bulb. I've measured that behavior in my Portable PowerFLARM, for example.


The OP said he was using a 14 volt SLA, which I suppose proves how he
absolutely must use SLA.


- not necessarily. Some of the older radios misbehaved when the "12V" SLAs were depleted down to under 12V. So people used 7-cell "14V" SLAs. With the LFP batteries maintaining above 13V through their discharge, I believe those 14V SLAs can be abandoned. Not to mention that very few of those old balky radios are still in service.


They better not be in service because they are illegal to use and have been illegal for many year..
  #13  
Old June 22nd 20, 11:42 AM
Delta8 Delta8 is offline
Member
 
First recorded activity by AviationBanter: Apr 2019
Location: Pa.
Posts: 56
Default

Quote:
Originally Posted by kinsell View Post
On 6/21/20 8:18 AM, wrote:
On Sunday, June 21, 2020 at 12:13:51 AM UTC-4, SoaringXCellence wrote:
Another item on your list has a very high current draw: The Stratux is based on a Raspberry Pi and those have more current draw than most of the rest of your panel!

I have a 15000mAh LimeFuel external pack I run with my Stratux (Pi 3 based). It goes too low for effective operation of the Pi in about 4.5 hours. The spec for the Pi says it needs a 2.5 Amp 5-volt power supply.

But I have found that some of the Pi devices have lower current needs, and especially if you are making your own Stratux, you should check out a few different units and pick the one with the lowest power draw.

The Stratux software will run on a Pi 2 or 3. The Pi 4 is definitely over kill and uses the most power of the bunch.

Mike




Talking about watt-hours, a "12V" LFP battery outputs 13.x volts through most of its discharge, thus outputs somewhat more watt-hours than an SLA that yields the same amp-hours. Most of our modern avionics use less current when fed a higher voltage, very unlike ye olde light bulb. I've measured that behavior in my Portable PowerFLARM, for example.


The OP said he was using a 14 volt SLA, which I suppose proves how he
absolutely must use SLA.

Back to the original topic, he said he's thinking of adding Flarm, and
most of those products have ADS-B In. I'd suggest going ahead and add
that, get a decent size screen, and forget the Stratux and iPad.
Haha Just ordered a 12v 15 ah Lifpo battery and a 12v to 5 v converter.
The SLA was powering an old radio yes. I would like to keep using the Stratux with Foreflight . It's also nice to have all the airport/weather info with a touch . It also has AHHRS ,I'm not planning on cloud flying but it's there if needed.
I am exploring Flarm purchase . Is there a Power Flarm that will give voice alerts with direction ? Currently I'll get a pretty specific warning "Traffic 12 O clock one mile same altitude " . For the money it provides a lot .
  #14  
Old June 22nd 20, 04:09 PM posted to rec.aviation.soaring
soaringjac
external usenet poster
 
Posts: 126
Default Battery question

On Saturday, June 20, 2020 at 11:43:06 AM UTC-7, Delta8 wrote:
I would like to build a 5 volt system to run Kobo with Top Hat/GPS as
well as power my I phone with ForeFlight and a Stratux receiver for
ads-b in . I like the audio collision avoidance that ForeFlight provides
.
Currently using power banks but during long flights changing batteries
is a pain .
I don't have Flarm yet but planning on in the future.
I have a 14v SLA battery for everything else.
Am I better of searching for a larger power bank ? Biggest I've seen is
70,000 mAh .
I've seen ways to convert 12v to 5 but they seem like they will drain
battery life of the 12v .
Sorry for what may be a simple question with an obvious answer.




--
Delta8


I use a couple of these battery buddies pluged into a rig runner. links below. works great! you can also get a usb splitter to run two usb devices off one battery buddy

https://powerwerx.com/usbbuddy-power...device-charger
https://powerwerx.com/west-mountain-...05h-horizontal
  #15  
Old June 23rd 20, 02:49 AM posted to rec.aviation.soaring
2G
external usenet poster
 
Posts: 1,439
Default Battery question

On Monday, June 22, 2020 at 5:43:07 AM UTC-7, Delta8 wrote:
kinsell;1023640 Wrote:
On 6/21/20 8:18 AM, wrote:-
On Sunday, June 21, 2020 at 12:13:51 AM UTC-4, SoaringXCellence
wrote:-
Another item on your list has a very high current draw: The Stratux is
based on a Raspberry Pi and those have more current draw than most of
the rest of your panel!

I have a 15000mAh LimeFuel external pack I run with my Stratux (Pi 3
based). It goes too low for effective operation of the Pi in about 4.5
hours. The spec for the Pi says it needs a 2.5 Amp 5-volt power supply.

But I have found that some of the Pi devices have lower current needs,
and especially if you are making your own Stratux, you should check out
a few different units and pick the one with the lowest power draw.

The Stratux software will run on a Pi 2 or 3. The Pi 4 is definitely
over kill and uses the most power of the bunch.

Mike-
-
-

Talking about watt-hours, a "12V" LFP battery outputs 13.x volts
through most of its discharge, thus outputs somewhat more watt-hours
than an SLA that yields the same amp-hours. Most of our modern avionics
use less current when fed a higher voltage, very unlike ye olde light
bulb. I've measured that behavior in my Portable PowerFLARM, for
example.
-

The OP said he was using a 14 volt SLA, which I suppose proves how he
absolutely must use SLA.

Back to the original topic, he said he's thinking of adding Flarm, and
most of those products have ADS-B In. I'd suggest going ahead and add
that, get a decent size screen, and forget the Stratux and iPad.


Haha Just ordered a 12v 15 ah Lifpo battery and a 12v to 5 v converter.

The SLA was powering an old radio yes. I would like to keep using the
Stratux with Foreflight . It's also nice to have all the airport/weather
info with a touch . It also has AHHRS ,I'm not planning on cloud flying
but it's there if needed.
I am exploring Flarm purchase . Is there a Power Flarm that will give
voice alerts with direction ? Currently I'll get a pretty specific
warning "Traffic 12 O clock one mile same altitude " . For the money it
provides a lot .




--
Delta8


How old is this radio? Is it a 760 channel radio?

Tom
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
A Different Battery Question Dan Marotta Soaring 18 December 3rd 19 06:15 AM
14v Battery Question. [email protected] Soaring 5 June 6th 15 02:40 AM
Battery Question mbremer216 Owning 7 October 6th 06 10:16 PM
Yet Another Battery Question P. Corbett Soaring 5 April 26th 06 02:22 AM
Battery Question [email protected] Soaring 19 September 15th 05 01:38 AM


All times are GMT +1. The time now is 09:57 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Copyright 2004-2022 AviationBanter.
The comments are property of their posters.