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warning lamp for LR3C regulators

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jay(at)horriblehyde.com
Guest

Posted: Wed Sep 08, 2010 3:34 am Post subject: warning lamp for LR3C regulators

Hey there Bob and all,  

   

I contacted B&C to ask whether the incandescent warning lamp (on pin 5) for the LR3C regulator could be replaced by an LED.  They responded that it could be in the 14V version but that I would have to check with Bob about the 28V version.  Is there any polarity that would need to be observed in the connection?  

   

Thanks  

South African Jay  

   

   

       [quote][b]

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Sep 08, 2010 7:31 am Post subject: warning lamp for LR3C regulators

At 06:24 AM 9/8/2010, you wrote:

  	  Quote: 	
		   Hey there Bob and all,

  

 I contacted B&C to ask whether the incandescent warning lamp (on pin 5) for the LR3C regulator could be replaced by an LED.  They responded that it could be in the 14V version but that I would have to check with Bob about the 28V version.  Is there any polarity that would need to be observed in the connection? 	




   Yes, both polarity AND resistors are important. See:



  http://aeroelectric.com/Pictures/Schematics/LR3_LV_Led_1.jpg



   For 28v raise resistors to 470 ohms. If the light is too

   bright, increase value of resistor in series with the

   lamp until desired brightness is attained. But for a warning

   light, you probably want to let it run "flat out".



 

   Bob . . .    [quote][b]

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jay(at)horriblehyde.com
Guest

Posted: Wed Sep 08, 2010 7:58 am Post subject: warning lamp for LR3C regulators

Thanks Bob!  

         

  

From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of Robert L. Nuckolls, III

 Sent: 08 September 2010 05:28 PM

 To: aeroelectric-list(at)matronics.com

 Subject: Re: AeroElectric-List: warning lamp for LR3C regulators  

  

   

At 06:24 AM 9/8/2010, you wrote:

 

   

Hey there Bob and all,

  

 I contacted B&C to ask whether the incandescent warning lamp (on pin 5) for the LR3C regulator could be replaced by an LED.  They responded that it could be in the 14V version but that I would have to check with Bob about the 28V version.  Is there any polarity that would need to be observed in the connection?  



 

   Yes, both polarity AND resistors are important. See:

 

 http://aeroelectric.com/Pictures/Schematics/LR3_LV_Led_1.jpg

 

   For 28v raise resistors to 470 ohms. If the light is too

   bright, increase value of resistor in series with the

   lamp until desired brightness is attained. But for a warning

   light, you probably want to let it run "flat out".

 

 

     

  Bob . . .    	  Quote: 	
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       [quote][b]

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