Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Re: Master switch warning

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List
View previous topic :: View next topic  
Author Message
nuckollsr(at)cox.net
Guest





PostPosted: Sun Jan 08, 2006 10:47 am    Post subject: Re: Master switch warning Reply with quote


At 04:53 PM 1/8/2006 +0100, you wrote:
<ykibuess(at)bluewin.ch>
The buzzer idea sounds great! Lights and other devices fed by the always
hot battery bus will empty the battery one day if that bus is not
supervised by an intelligent warning system. Any specialist in
electronics out there who is able and willing to invent and build such a
warning (buzzer) system?

I'm not understanding your question. If one wants a
master switch warning, the goal is to sense when the
main bus is hot and the alternator is not supporting
the bus, i.e., engine is not running or alternator is
OFF.
Such a warning device would not require any power from
an always-hot battery bus. The low voltage warning runs
totally from the main bus and the oil-pressure switch
driven warning/hobbs circuit suggested at:
http://www.aeroelectric.com/PPS/Engine/Gaging/Oil P Warn.pdf
. . . gets Hobbs power from the battery bus and warning power
from the e-bus. This arrangement provides Switch-left-on
warning for BOTH the master and the e-bus alternate feed switches
and takes no power from the battery bus when the airplane is
parked.
I'm not understanding where either active notification
of low volts (which you need for other reasons) and/or oil
pressure warning + buzzer (which are also used for other reasons)
would not also serve, individually or collectively to let
you know that you've walked away leaving the master switch
on. Except that low-volts warning does not watch the e-bus
alternate feed switch. However, the oil-p warning does.
Bob . . .

- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group