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dim able strip LED lighting
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jimw_btg(at)earthlink.net
Guest

Posted: Tue Sep 07, 2010 7:07 pm Post subject: dim able strip LED lighting

Raymond,



I will when we have finalized this section formally with our customer and they have signed off on that part of the project.  We have a IP Intellectual Property clause issues on each item that we need to get sign off for.  But yes once this is signed off I will send this out to the mass.  



Jim Wickert

Vision #159  "Vision some will have it some will not"

Tel 920-467-0219

Cell 920-912-1014

--

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raymondj(at)frontiernet.n
Guest

Posted: Wed Sep 08, 2010 2:51 am Post subject: dim able strip LED lighting

Thought there might be issues. I'll look forward to seeing it.



do not archive



Thanks again,

Raymond Julian

Kettle River, MN



On 09/07/2010 10:03 PM, Jim Wickert wrote:

[quote] 

 Wickert"<jimw_btg(at)earthlink.net>



 Raymond,



 I will when we have finalized this section formally with our customer

 and they have signed off on that part of the project.  We have a IP

 Intellectual Property clause issues on each item that we need to get

 sign off for.  But yes once this is signed off I will send this out

 to the mass.



 Jim Wickert Vision #159  "Vision some will have it some will not" Tel

 920-467-0219 Cell 920-912-1014

 --

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Eric M. Jones

Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts

Posted: Wed Sep 08, 2010 6:18 am Post subject: Re: dim able strip LED lighting

Having an official (and permanent) FAA color vision waiver gives me a unique position to comment on cockpit lighting color...Ahem....



Miscellaneous notes:



When I had bilateral lens replacements last year I got the opportunity to examine my eyeball lenses in a jar. They were both the color of tea.  This change of color is what happens when you age.



Remember that color vision studies (and their relevance in the cockpit) are all done on 18-25-year olds. Perhaps they are not so relevant for us geriatric aviators.



Consider throwing in a low-power UV LED to the the ambient light. 



My opinion is that blue LEDs have been overused. For years, blue was under-used because LEDs didn't do it and incandescents had little blue and needed filtering. Automotive high-beam warning lights were a big driver for their development. Now our new dishwasher has these Zombie-Blue LEDs. Yuck.



White light is best for reading paper charts. But reading paper maps is declining in importance with glass cockpits and computers. (You could make a paper chart that was designed for reading in red light... science project....)



There are LEDs that do weird and wonderful things; they pulsate, gyrate, strobe and change colors. Now if you wanted a warning light that you absolutely couldn't ignore!...There ya' go.



So do what you want generally consistent with safety, reasonableness and future saleability.



Cold hearted orb that rules the night

Removes the colours from our sight

Red is gray and yellow, white

But we decide which is right

And which is an illusion....

             (Moody Blues, Days of Future Past)

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_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net

Eric M. Jones

Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts

Posted: Mon Oct 18, 2010 7:22 am Post subject: Re: tiny lamp dimmer

A friend of mine has a hi-tech bow with fiberoptic cross-hair sights, lighted by three stacked hearing aid batteries. He pays me in venison.



The LED needed replacing and I fixed it, but that one broke too. Next time I added a tiny pcb to the LED. Then he complained that the LED was far too bright.



So I planned to add a resistor that would respond to pressure so when the cap was screwed on, the LED would brighten or dim. It turns out that the black conductive foam used to package ICs, works well as a pressure sensitive low value resistor. I punched out a little disk of it and added it to the stack of batteries. 



Result? It worked remarkably well. 



I offer this technique to anyone who want to have a dimming control in a flashlight with stacked batteries.

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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:

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_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net

james(at)etravel.org
Guest

Posted: Mon Oct 18, 2010 8:01 am Post subject: dim able strip LED lighting

Ha!  That's brilliant!  Thanks for sharing that snippet.



James



Do not archive



On 18 October 2010 16:22, Eric M. Jones <emjones(at)charter.net> wrote:

 	  Quote: 	
		   



 A friend of mine has a hi-tech bow with fiberoptic cross-hair sights, lighted by three stacked hearing aid batteries. He pays me in venison.



 The LED needed replacing and I fixed it, but that one broke too. Next time I added a tiny pcb to the LED. Then he complained that the LED was far too bright.



 So I planned to add a resistor that would respond to pressure so when the cap was screwed on, the LED would brighten or dim. It turns out that the black conductive foam used to package ICs, works well as a pressure sensitive low value resistor. I punched out a little disk of it and added it to the stack of batteries.



 Result? It worked remarkably well.



 I offer this technique to anyone who want to have a dimming control in a flashlight with stacked batteries.



 --------

 Eric M. Jones

 www.PerihelionDesign.com

 113 Brentwood Drive

 Southbridge, MA 01550

 (508) 764-2072

 emjones(at)charter.net





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