Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

LED Ghosting
Goto page Previous 1, 2, 3, 4, 5

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

donjohnston

Joined: 13 Dec 2009
Posts: 231

Posted: Mon Jun 23, 2014 8:34 am Post subject: Re: LED Ghosting

Mission accomplished!



The analyzer alarm LEDs will go out before the others at around 15% brightness. But above that, those LEDs are the same brightness as the others. I played around with different resistance values and determined that 18K between the source and gate provide the widest range and relative brightness.  



Thanks all!!!

- 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

Annun (Small).jpg

Description:

Filesize:

40.76 KB

Viewed:

6936 Time(s)

user9253

Joined: 28 Mar 2008
Posts: 1932
Location: Riley TWP Michigan

Posted: Mon Jun 23, 2014 10:05 am Post subject: Re: LED Ghosting

Good job Don

- 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

_________________
Joe Gores

Thermos

Joined: 08 Sep 2007
Posts: 3

Posted: Wed Nov 02, 2016 6:16 am Post subject: Re: LED Ghosting

Bob,



Reawakening this thread, you mentioned a few years ago a potential mod to the LR3C to eliminate "ghosting" when using LEDs as annunciators -



"The 'problem' can be eliminated by snipping out  the one-time-useful resistor. I think I'll suggest that B&C eliminate that resistor in future production and modify any regulators that come back for other reasons."



Am I understanding this correctly as a solution, and if so, was this mod ever made by B&C? I purchased an LR3C this year and if it's the same as before, I may wait 'till it's out of warranty then do the mod myself.



Thanks,



Dave

- 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

_________________
Dave Setser
RV-7 Firewall Forward
KBED/KASH

nuckolls.bob(at)aeroelect
Guest

Posted: Wed Nov 02, 2016 7:02 am Post subject: LED Ghosting

At 09:16 AM 11/2/2016, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "Thermos" <dave(at)mightyrv.com>



 Bob,



 Reawakening this thread, you mentioned a few years ago a potential mod to the LR3C to eliminate "ghosting" when using LEDs as annunciatirs-



 "The 'problem' can be eliminated by snipping out  the one-time-useful resistor. I think I'll suggest that B&C eliminate that resistor in future production and modify any regulators that come back for other reasons."



 Am I understanding this correctly as a solution, and if so, was this mod ever made by B&C? I purchased an LR3C this year and if it's the same as before, I may wait 'till it's out of warranty then do the mod myself. 	


     The LV warning output from the LR3 is designed

     to drive INCANDESCENT lamps while offering a

     warning for loss of operating power to the

     LV warning system. This philosophy has served

     TC and OBAM aviation well for several decades.



     LEDS are the new kids on the block . . . and like

     lithium batteries, dynamic microphones, LED

     nav lights, etc . . . they are not form/fit/function

     drop-on replacements for their legacy ancestors.

     It's easy to make an LED emulate the

     incandescent lamp for purposes of using it to

     annunciate low volts on an LR3 installation.



  http://tinyurl.com/cgnwr5k



     But if you'd rather mod the regulator instead,

     that's certainly doable . . .



 

   Bob . . .    [quote][b] [quote][b]

- 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

nuckolls.bob(at)aeroelect
Guest

Posted: Wed Nov 02, 2016 8:14 am Post subject: LED Ghosting

DON'T KNOW WHAT HAPPENED . . . THE ORIGINAL

 REPLY GOT TRUNCATED. LET'S TRY AGAIN.



 At 09:16 AM 11/2/2016, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "Thermos" <dave(at)mightyrv.com>



 Bob,



 Reawakening this thread, you mentioned a few years ago a potential mod to the LR3C to eliminate "ghosting" when using LEDs as annunciatirs-



 "The 'problem' can be eliminated by snipping out  the one-time-useful resistor. I think I'll suggest that B&C eliminate that resistor in future production and modify any regulators that come back for other reasons."



 Am I understanding this correctly as a solution, and if so, was this mod ever made by B&C? I purchased an LR3C this year and if it's the same as before, I may wait 'till it's out of warranty then do the mod myself. 	


     The LV warning output from the LR3 is designed

     to drive INCANDESCENT lamps while offering a

     warning for loss of operating power to the

     LV warning system. This philosophy has served

     TC and OBAM aviation well for several decades.



     LEDS are the new kids on the block . . . and like

     lithium batteries, dynamic microphones, LED

     nav lights, etc . . . they are not form/fit/function

     drop-on replacements for their legacy ancestors.

     It's easy to make an LED emulate the

     incandescent lamp for purposes of using it to

     annunciate low volts on an LR3 installation.



  http://tinyurl.com/cgnwr5k



     But if you'd rather mod the regulator instead,

     that's certainly doable . . .



 

   Bob . . .     [quote][b] [quote][b]

- 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

nuckolls.bob(at)aeroelect
Guest

Posted: Wed Nov 02, 2016 8:30 am Post subject: LED Ghosting

To: aeroelectric-list(at)matronics.com

 Subject: Re: Re: LED Ghosting 



 MAYBE THE THIRD TIME IS THE 'CHARM' . . . I

 RAN A CUT-N-PASTE THROUGH A VISIBLE TEXT ONLY

 FILTER JUST IN CASE SOME HIDDEN CHARACTER

 WAS CAUSING THE MESSAGE TO END EARLY . . .



 At 09:16 AM 11/2/2016, you wrote:



 --> AeroElectric-List message posted by: "Thermos" <dave(at)mightyrv.com>



 Bob,



 Reawakening this thread, you mentioned a few years ago a potential mod to the LR3C to eliminate "ghosting" when using LEDs as annunciatirs-



 "The 'problem' can be eliminated by snipping out  the one-time-useful resistor. I think I'll suggest that B&C eliminate that resistor in future production and modify any regulators that come back for other reasons."



 Am I understanding this correctly as a solution, and if so, was this mod ever made by B&C? I purchased an LR3C this year and if it's the same as before, I may wait 'till it's out of warranty then do the mod myself.



     The LV warning output from the LR3 is designed

     to drive INCANDESCENT lamps while offering a

     warning for loss of operating power to the

     LV warning system. This philosophy has served

     TC and OBAM aviation well for several decades.



     LEDS are the new kids on the block . . . and like

     lithium batteries, dynamic microphones, LED

     nav lights, etc . . . they are not form/fit/function

     drop-in replacements for their legacy ancestors.

     It's easy to make an LED emulate the

     incandescent lamp for purposes of using it to

     annunciate low volts on an LR3 installation.



     See:   http://tinyurl.com/cgnwr5k



     But as you've noted modifying the regulator instead,

     is certainly doable . . .

 

   Bob . . .     [quote][b] [quote][b]

- 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

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours Goto page Previous 1, 2, 3, 4, 5
Page 5 of 5

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