<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
You need to be somewhat careful about the products you parallel up
for the redundant supply setup. You cannot use a switching regulator
such as the Castle. These are usually touted as BECs. You cannot use
the BEC from your ESC if you have one. There is nothing wrong with
these products, you just cannot operate them in parallel with
another power source. If the regulator will accept an input voltage
higher than a 2s lipo, it is probably a switching regulator.<br>
It is a good idea to use regulators for which you can adjust the
output voltage to tune the load sharing. <br>
John<br>
<br>
On 1/24/2012 7:34 AM, Scott McHarg wrote:
<blockquote
cite="mid:CALDH1UrYtcjr_MZ=D1mDbFD4sPzHWYMnLuiXzt5E81aV5Lh6SQ@mail.gmail.com"
type="cite">Anthony,<br>
The draw for a pattern plane for the receivers per flight is
between 25-50 mah typically. The cells do come out of balance but
they also typically will easily have that much variation in them
in a normal flight as each cell will not have exactly the same
discharge rate. When you charge your pack after the flight, the
charging process will balance them out. It also depends on how
you set up your redundant system. If you set the voltage
regulator from your main pack to be your "back up" by setting a
lower voltage than the primary pack, you won't use your main
battery unless something goes wrong with the primary pack. If you
set the voltage regulator on the main pack to be the same as your
regulator, you will be running a dual system which means (ideally)
the rx will take power from both main battery and primary and you
can reduce the draw on the pack by 1/2 of the normal mah used. If
you set your main battery regulator higher than the primary pack,
the main battery then becomes your primary and your small rx pack
does not get used unless something happens to the main battery.<br>
As Dave stated, you should not run switching regulators
parallel but standard regulators such as the Tech-Aero and
Smart-Fly as well as others is not a problem.<br>
<br>
Scott<br>
<br>
<div class="gmail_quote">On Tue, Jan 24, 2012 at 8:15 AM, Anthony
Romano <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:anthonyr105@hotmail.com">anthonyr105@hotmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div dir="ltr">
Seems like a great idea but I have two questions. Do the
packs come down out of balance since two cells are
serving extra load? Is there a problem with parallel
operation of two regulators?<br>
<br>
Thanks,<br>
<br>
Anthony<br>
<br>
<div>
<hr>
From: <a moz-do-not-send="true"
href="mailto:joddino@socal.rr.com" target="_blank">joddino@socal.rr.com</a><br>
Date: Mon, 23 Jan 2012 15:25:00 -0800<br>
To: <a moz-do-not-send="true"
href="mailto:nsrca-discussion@lists.nsrca.org"
target="_blank">nsrca-discussion@lists.nsrca.org</a><br>
Subject: Re: [NSRCA-discussion] Main battery redundant
lead for receiver<br>
<br>
I've been using this setup for sometime and it is
working great. I have my two cell LiPo charged to 7.5
volts and it is connected to a 6.0 volt regulator into
the receiver. The cable connected to the balance
connector on the "bottom" 5S is connected to a 6.3 volt
regulator so it supplies all the current to the system
and the 2S pack never needs charging. I'm using an 800
mAh pack but it could be even smaller.
<div><br>
</div>
<div>Jim O<br>
<div><br>
</div>
<div><br>
<div>
<div>On Jan 23, 2012, at 2:09 PM, Scott McHarg
wrote:</div>
<br>
<blockquote>Guys,<br>
Chris Moon just e-mailed me about some leads
that were done at the factory. These leads run
off your balance leads to a voltage regulator
and allow your main battery pack to be utilized
as a redundant receiver battery. It is NOT
meant to be a primary but it will save 20+ grams
if you're running 2 rx batteries. You still
have to run the 2nd regulator for true
redundancy but you eliminate the 2nd battery.
These leads are factory made and eliminate the
need to make them yourself with the concern
about plugging in to the wrong cell. I know in
my article, I was pretty much against doing this
as a backup but, with Chris having this made at
the factory, he has all but eliminated making a
mistake by tying to the wrong cell. I have the
link that I'll e-mail you off-list or you can
just go to his website. I don't want to break
the NSRCA list rules by advertising for him even
though he advertises with the NSRCA. The leads
are only $3.99 each and are found under the
Connectors/Adapters listing.<br>
<br>
Thank,<br>
Scott<br clear="all">
<br>
-- <br>
<b style="COLOR:rgb(51,51,255)"><font
style="FONT-FAMILY:comic sans ms,sans-serif"
size="4">Scott A. McHarg</font></b><br>
<br>
_______________________________________________<br>
NSRCA-discussion mailing list<br>
<a moz-do-not-send="true"
href="mailto:NSRCA-discussion@lists.nsrca.org"
target="_blank">NSRCA-discussion@lists.nsrca.org</a><br>
<a moz-do-not-send="true"
href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion"
target="_blank">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a></blockquote>
</div>
<br>
</div>
</div>
<br>
_______________________________________________
NSRCA-discussion mailing list <a moz-do-not-send="true"
href="mailto:NSRCA-discussion@lists.nsrca.org"
target="_blank">NSRCA-discussion@lists.nsrca.org</a> <a
moz-do-not-send="true"
href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion"
target="_blank">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a></div>
</div>
</div>
<br>
_______________________________________________<br>
NSRCA-discussion mailing list<br>
<a moz-do-not-send="true"
href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a><br>
<a moz-do-not-send="true"
href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion"
target="_blank">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><br>
</blockquote>
</div>
<br>
<br clear="all">
<br>
-- <br>
<b style="color:rgb(51,51,255)"><font style="font-family:comic
sans ms,sans-serif" size="4">Scott A. McHarg</font></b><br>
<br>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
NSRCA-discussion mailing list
<a class="moz-txt-link-abbreviated" href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a>
<a class="moz-txt-link-freetext" href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a></pre>
</blockquote>
</body>
</html>