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LED as LV Annunciator

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jonlaury

Joined: 06 Nov 2006
Posts: 336

Posted: Sun Sep 05, 2010 7:42 am Post subject: LED as LV Annunciator

I want to use an LED as a LV annunciator.



But from the products that AEC lists for driving LED's and what they do, I gather that using LED's over incandescent lamps can cause noise problems. 



Does using a couple of LED's with the appropriate resistor create noise antagonists?

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nuckolls.bob(at)aeroelect
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Posted: Sun Sep 05, 2010 9:39 am Post subject: LED as LV Annunciator

At 10:42 AM 9/5/2010, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "jonlaury" <jonlaury(at)impulse.net>



 I want to use an LED as a LV annunciator.



 But from the products that AEC lists for driving LED's and what they do, I gather that using LED's over incandescent lamps can cause noise problems. 	


   You must be reading the information published

   concerning noise issues on POWER SUPPLIES used

   to excite high intensity arrays of LEDs.



 [img]cid:7.1.0.9.0.20100905122859.01ec16d0(at)aeroelectric.com.0[/img] 

    In this case, it's the electronics that becomes a

    potential antagonist for sensitive victims. It was

    a potential cum reality that prompted a re-packaging

    of the LuxDrive power supplies on a filter board

    as shown above.



  	  Quote: 	
		  Does using a couple of LED's with the appropriate resistor create noise antagonists? 	


    The LED is probably 10x noisier than other diodes . . .

    but take that with a grain of salt. Virtually ALL electronic

    devices passing current generate some noise. But

    in the case of diodes, resistors and such, the amount

    of is so tiny as to require special receivers

    just to go find it . . . the garden variety

    instrumentation system wont know it's there.



    So install as many LEDs and companion resistors

    as needed to meet your design goals. Noise potential

    has no practical significance. 



 

   Bob . . .

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jonlaury

Joined: 06 Nov 2006
Posts: 336

Posted: Sun Sep 05, 2010 12:16 pm Post subject: Re: LED as LV Annunciator

Bob,

Thank you for that illumination. (I couldn't resist;-) Ohmy God! This is getting revolting! I seem stuck here no matter watt I do.



John



Do not archive

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nuckolls.bob(at)aeroelect
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Posted: Sun Sep 05, 2010 12:26 pm Post subject: LED as LV Annunciator

At 03:16 PM 9/5/2010, you wrote:

 	  Quote: 	
		  



Bob,

Thank you for that illumination. (I couldn't resist;-) Ohmy God! 

This is getting revolting! I seem stuck here no matter watt I do.


	


    Better to be "stuck" in the light as opposed to

    wandering in the dark. We all started from right

    where you are now.

   Bob . . .

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