[NSRCA-discussion] Main battery redundant lead for receiver

[Keith Hoard]

I think some dude may have already posted a thread with pictures on the
NSRCA website forums?

Keith Hoard
Collierville, TN
khoard at gmail.com




On Mon, Jan 23, 2012 at 6:09 PM, Chris Moon <cjm767driver at hotmail.com>wrote:

>  The "low end" pack in a 10S setup is the one with the neg (black) main
> power lead going to the ESC input.  This is the pack that you would
> consider as "channel 1" on the Cellpro or TP chargers.
>
> The goal is to power the radio from the motor pack to that voltage
> regulator needs to be higher than the regulator used on the back up pack
> which can be a 200-350mah 2S pack.  Jim O. came to me with this setup a
> while back and as he said has been flying it for some time with success.  I
> am working on a schematic or picture to go on the web site to show the
> proper hook up of the system.
>
> Chris
>
> On 1/23/2012 6:56 PM, John Gayer wrote:
>
> I would like to emphasize that the pigtail from Chris Moon could
> physically  be plugged into either of the 5s balance connectors which Jim
> identifies as the "bottom" connector. If your esc is not fully optically
> isolated on the ground leg and you plug into the "upper" battery, there
> will be smoke. If there is a BEC in your ESC, there will NOT be isolation.
> In that case, I suggest that you tag or use nail polish to identify the
> correct balance connector on each pack as you will be plugging into this
> balance connector whenever you change batteries. It is also a good idea to
> use a switch for each power lag and check each leg for power separately as
> part of your pre-flight process. It is easy to forget plugging in the
> balance connector when you start using this system plus it is important to
> confirm that both legs are working before each and every flight. Otherwise
> you can lose your redundancy before the flight even begins.
> The Castle HV series without BEC allows you to use either balance
> connector without any issues.
>
> John
>
> On 1/23/2012 4:25 PM, James Oddino wrote:
>
> 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.
>
>  Jim O
>
>
>
>  On Jan 23, 2012, at 2:09 PM, Scott McHarg wrote:
>
> Guys,
>    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.
>
> Thank,
> Scott
>
> --
> *Scott A. McHarg*
>
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