Return-Path: <marv@lancaironline.net>
Received: from [65.33.164.156] (account marv@lancaironline.net)
  by logan.com (CommuniGate Pro WebUser 4.1.8)
  with HTTP id 3075766 for flyrotary@lancaironline.net; Fri, 12 Mar 2004 10:33:08 -0500
From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [FlyRotary] charging
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
X-Mailer: CommuniGate Pro WebUser Interface v.4.1.8
Date: Fri, 12 Mar 2004 10:33:08 -0500
Message-ID: <web-3075766@logan.com>
In-Reply-To: <list-3075563@logan.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"; format="flowed"
Content-Transfer-Encoding: 8bit

  > > > I'm still having trouble with my alternator warning light.
I know we discussed this before, but would someone refresh my mind?
Currently I have an LED in the circuit as the warning light. It doesn't go
out. Buss voltage seems fairly stable at 14.2v with engine running. Do I
need a regular bulb rather an LED, and what are the specs of the diode shown
in the schematic?
John Slade (hit 25 mph last night) < < < 


Hi John,

This sounds amazingly like the problem I encountered on the Eagle540 project. 
 We have a B&C voltage regulator and use a Proprietary Software Systems 
annunciator panel (that incorporates LEDs) for our bank of idiot lights.  The 
"Electrical" lite would lite up at full brightness any time the master was on 
and the alternator wasn't producing charging voltage, as it was supposed to. 
 When we would start the engine and power up the alternator, however, the 
"Electrical" LED would still be illuminated, albeit at a much lower level... 
ie, the system was charging but there was enough leakage through the indicator 
lamp circuit to keep the LED partially energized.  I spoke with B&C about the 
problem and was advised to add a 510-ohm resistor between the indicator output 
terminal and another one on the regulator (I'll let you know which one later), 
and the addition of the resistor solved the problem.  I don't know what your 
charging/annunciator system looks like, but I'll bet your solution will be 
similar to mine.  

       <Marv>