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Kitplanes article on an Elegant LED driver
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PSYCHOSE

Joined: 03 Oct 2008
Posts: 3

Posted: Fri Oct 03, 2008 10:19 am Post subject: Re: Kitplanes article on an Elegant LED driver

Hello Bob, 



I am a similar situation as Brian, would it possible to let us know of the exact components and values used to build the filter, perhaps a rough sketch of your circuit?



regards, 



Normand

_________________
Normand Gingras RV8 wings

Brantel

Joined: 23 Aug 2008
Posts: 53

Posted: Fri Oct 03, 2008 10:35 am Post subject: Re: Kitplanes article on an Elegant LED driver

Normand,



Check out:



http://aeroelectric.com/Pictures/Lighting/Buck-Puck/

PSYCHOSE

Joined: 03 Oct 2008
Posts: 3

Posted: Sat Oct 04, 2008 9:36 am Post subject: Re: Kitplanes article on an Elegant LED driver

Thanks for your response Bob.



Pardon my ignorance, but I surmise that the capacitances and 100 mH inductance included in your diagram are embedded in the "•101" component we see in one of the photos.  



If this is correct, could you provide the part number of this device?



Finally, did you or Brian get a chance to test your design for EMI in the RF range?



regards, 



Normand RV8 wings

_________________
Normand Gingras RV8 wings

nuckolls.bob(at)cox.net
Guest

Posted: Sat Oct 04, 2008 2:58 pm Post subject: Kitplanes article on an Elegant LED driver

At 10:36 AM 10/4/2008 -0700, you wrote:

 	  Quote: 	
		  



Thanks for your response Bob.



Pardon my ignorance, but I surmise that the capacitances and 100 mH 

inductance included in your diagram are embedded in the "•101" component 

we see in one of the photos.



If this is correct, could you provide the part number of this device?



Finally, did you or Brian get a chance to test your design for EMI in the 

RF range?



regards,


	


   The input and output filters are 100 uH, 1A inductors

   flanked both sides by 0.1 uF and 0.001 uF monolythic

   ceramic capacitors.



   The parts values are a WAG based on availability of

   high-current surface mount inductors and inventory.

   I was hoping to get a window of opportunity to run

   the assembly through the lab for a quick look-see

   at DO-160 conducted performance but it didn't come

   to pass. So I had to forward the assembly you see to

   Brian for A-B comparison in his as-installed environment.

   Successful mitigation of Brian's observed interference

   doesn't necessary mean we have the "golden design",

   on that noises have been attenuated sufficiently

   to meet his needs.



   If it works for Brian, I'm willing to publish the

   board artwork for the device along with the bill of

   materials and sources. Haven't heard from Brian yet.



   Bob . . .

Brantel

Joined: 23 Aug 2008
Posts: 53

Posted: Sat Oct 04, 2008 5:12 pm Post subject: Re: Kitplanes article on an Elegant LED driver

Hey guys,



I received the prototype sometime this week.  I have been on vacation and will test and report as soon as possible.



Most likely will be Monday or Tuesday evening.



Best regards,



Brian C.

Brantel

Joined: 23 Aug 2008
Posts: 53

Posted: Thu Oct 09, 2008 2:40 pm Post subject: Re: Kitplanes article on an Elegant LED driver

Bob I was able to test with a handheld not connected to anything.



Test one:  Original Raw Driver, led array and about 3 ft of power wires.  Handheld gets trashed at over 20ft.  Lots of audible noise and the squelch is opened even at max.



Test two: Bob's Modified Driver, same everything else.  Handheld can be as close as 1 ft before picking up noise and it gets stronger the closer the antenna is to the setup.



Test three:  Bob's driver, same everything else with the power wires to the driver passed twice thru a ferrite core.  Handheld can be as close as the antenna touching the power wires with no noise.



Seems we are very much on the right track.  With the ferrite core, it seems the problems are almost fully eliminated.



Bob, how can I get another one of these for the other side of my nav lights?  



I do not have a panel mount to test.  This would be the ultimate test as the driver and the radio would be sharing a common power supply.



Bob, your thoughts????

Brantel

Joined: 23 Aug 2008
Posts: 53

Posted: Fri Oct 10, 2008 4:47 am Post subject: Re: Kitplanes article on an Elegant LED driver

Bob,



I have a volunteer that has agreed to test this modified driver in his RV.  This is a person that had tried the original raw driver and who had sever problems with noise.



This will be a good test because he knows how they performed before and he will know after.  Currently he replaced the drivers with resistors.



His application also has a Archer wingtip Nav antenna and he plans on putting the modified driver on that side so we can see how it affects Nav radio performance as well.



It will take a few days but we will get some real airplane testing done!



It looks very promising when just comparing it to the way they affected the handheld so I expect the aircraft will have similar results.



Bob are you planning to market these or just give us the sources and info needed to build our own?



Thanks for your help Bob!

nuckolls.bob(at)cox.net
Guest

Posted: Fri Oct 10, 2008 4:51 am Post subject: Kitplanes article on an Elegant LED driver

At 03:40 PM 10/9/2008 -0700, you wrote:

 	  Quote: 	
		  



Bob I was able to test with a handheld not connected to anything.



Test one:  Original Raw Driver, led array and about 3 ft of power 

wires.  Handheld gets trashed at over 20ft.  Lots of audible noise and the 

squelch is opened even at max.



Test two: Bob's Modified Driver, same everything else.  Handheld can be as 

close as 1 ft before picking up noise and it gets stronger the closer the 

antenna is to the setup.



Test three:  Bob's driver, same everything else with the power wires to 

the driver passed twice thru a ferrite core.  Handheld can be as close as 

the antenna touching the power wires with no noise.


	


   Very good data. It looks like we could

   consider a bit more attention to the VHF spectrum

   outside the boundaries of the existing filter.

   But I suspect that the present configuration

   would be clean enough for service without

   the ferrites.



 	  Quote: 	
		  Seems we are very much on the right track.  With the ferrite core, it 

seems the problems are almost fully eliminated.



Bob, how can I get another one of these for the other side of my nav lights?


	


   I have more boards and parts but no power

   supplies (you supplied the one we used). Do

   you want me to assemble one or send you the

   parts? You'll note some chop-n-hack on the

   board where I corrected a layout error.



   Perhaps I just need to correct the layout

   and then publish the ECB art along with

   a bill of materials. You guys can probably

   run with it. All the parts come from Digikey.

 	  Quote: 	
		  I do not have a panel mount to test.  This would be the ultimate test as 

the driver and the radio would be sharing a common power supply.


	


   Given the results of your experiment with the

   hand-held as an e-field sniffer, I think the

   present configuration would play well in the

   airplane. I'm still planning on getting into

   the RFI lab out at NAIR. I attended a meeting

   out there last night and bugged 'em about it

   again. You think government and industry are

   wading around hip-deep in bureaucratic mud,

   take a peek into a university some time!



   Bob . . .

Brantel

Joined: 23 Aug 2008
Posts: 53

Posted: Fri Oct 10, 2008 5:04 am Post subject: Re: Kitplanes article on an Elegant LED driver

[quote="nuckolls.bob(at)cox.net"]At 03:40 PM 10/9/2008 -0700, you wrote:

 	  Quote: 	
		     I have more boards and parts but no power

   supplies (you supplied the one we used). Do

   you want me to assemble one or send you the

   parts? You'll note some chop-n-hack on the

   board where I corrected a layout error.

   Bob . . . 	


Bob since you have the parts and the boards and know how you modified the board to make it work, could you assemble one more for me?  I could send you another driver to install.  I am more than willing to pay you for the work and shipping, just let me know what that would be.



As far as future ones, I am sure there are some that would be OK will assembling their own and I am sure that there are some that would rather you just sell them a completed one.  To minimize the stress on your end, if you could just publish the board art, bom and sources, I am sure that would be OK with most people.



Let us know!

nuckolls.bob(at)cox.net
Guest

Posted: Fri Oct 10, 2008 10:39 am Post subject: Kitplanes article on an Elegant LED driver

At 06:04 AM 10/10/2008 -0700, you wrote:

 	  Quote: 	
		  

Bob since you have the parts and the boards and know how you modified the 

board to make it work, could you assemble one more for me?  I could send 

you another driver to install.  I am more than willing to pay you for the 

work and shipping, just let me know what that would be.



As far as future ones, I am sure there are some that would be OK will 

assembling their own and I am sure that there are some that would rather 

you just sell them a completed one.  To minimize the stress on your end, 

if you could just publish the board art, bom and sources, I am sure that 

would be OK with most people.



Let us know!


	


   Okay, I did the sharp pencil treatment on a

   filtered LED driver as follows:



   AEC9051-1 1-Amp, LED Driver Assembly similar

   to . . .



http://aeroelectric.com/Pictures/Lighting/Buck-Puck/BuckPuck_1.jpg



   except connector will be right angle version and

   exit the board parallel to the mounting surface

   as opposed to standing up.



   Board will be fitted with the LuxDrive 03021-D-N-1000

   1A LED driver module and filter components shown in



http://aeroelectric.com/Pictures/Lighting/Buck-Puck/BuckPuck_4.jpg



http://aeroelectric.com/Pictures/Lighting/Buck-Puck/BP_Filter_V1p1.pdf



   A complete kit consisting of board assembly, mating

   d-sub connector, connector hood and machined d-sub

   pins as shown in . . .



http://aeroelectric.com/Pictures/Lighting/Buck-Puck/BuckPuck_3.jpg



   (except for connector orientation).



   I'll need orders for 20 assemblies to break even

   for tooling up and bringing in unique inventory (ECBs and

   Buck-Pucks).



   Price for each assembly as described is $46.00 plus postage.

   This device has been added to the order form at:



https://matronics.com/aeroelectric/Catalog/AECcatalog.html

        Bob . . .



        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

        ----------------------------------------

PSYCHOSE

Joined: 03 Oct 2008
Posts: 3

Posted: Fri Oct 10, 2008 5:27 pm Post subject: Re: Kitplanes article on an Elegant LED driver

Hello Bob, 



While I would rather purchase your assembled units, I already have purchased the BuckPuck and would appreciate the parts list so that I could roll my own, unless you would be willing to send me the assembled unit minus the Buckpuck which I would solder in myself.



regards, 



Normand RV8 wings.

_________________
Normand Gingras RV8 wings

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