geekhack

geekhack Community => Keyboards => Topic started by: C5Allroad on Wed, 02 October 2013, 17:24:13

Title: Keyboard LEDs
Post by: C5Allroad on Wed, 02 October 2013, 17:24:13
Do keyboard Leds burn out if left on full brightness?
How long should they last?
Title: Re: Keyboard LEDs
Post by: Photoelectric on Wed, 02 October 2013, 17:35:35
They are rated for thousands upon thousands of hours of operation, so not until they are defective or something goes wrong (like a current spike).
Title: Re: Keyboard LEDs
Post by: dorkvader on Wed, 02 October 2013, 17:35:52
Do keyboard Leds burn out if left on full brightness?
How long should they last?

The LED's are being driven at a fraction of their rated current and should last a few hundred thousand hours.
Title: Re: Keyboard LEDs
Post by: PointyFox on Wed, 02 October 2013, 17:37:31
Even if they do manage to go out, they are fairly simple to replace.  ~$10 in tools if you don't already have them.
Title: Re: Keyboard LEDs
Post by: C5Allroad on Wed, 02 October 2013, 17:41:11
Thanks guys! I have used my K90 and never thought about it. But now with my shine 3 I was wondering because of the lighting modes, how long will they last. Well I guess it's no need to worry lol.
Title: Re: Keyboard LEDs
Post by: rowdy on Wed, 02 October 2013, 22:38:06
I suspect the caps lock LED in my first Ducky Shine has died :(
Title: Re: Keyboard LEDs
Post by: Photoelectric on Wed, 02 October 2013, 22:39:07
It may be the connection (solder joints).  LEDs generally don't burn out--they fade in brightness over time.  It's accelerated by heat and humidity.
Title: Re: Keyboard LEDs
Post by: rowdy on Thu, 03 October 2013, 05:22:46
Thanks - I might have to open it when have a look when I get a chance.
Title: Re: Keyboard LEDs
Post by: C5Allroad on Thu, 03 October 2013, 05:49:05
It may be the connection (solder joints).  LEDs generally don't burn out--they fade in brightness over time.  It's accelerated by heat and humidity.
How long does if usually take for them to start fading?
Title: Re: Keyboard LEDs
Post by: mapple on Thu, 03 October 2013, 06:46:02
I suspect the caps lock LED in my first Ducky Shine has died :(

so why u scream so much?:P
Title: Re: Keyboard LEDs
Post by: Photoelectric on Thu, 03 October 2013, 11:39:47
It may be the connection (solder joints).  LEDs generally don't burn out--they fade in brightness over time.  It's accelerated by heat and humidity.
How long does if usually take for them to start fading?

They fade all the time--gradually.  Since they are first turned on.  The rate of brightness decay depends on many factors.  With monitor backlight, you may notice a significant decrease after about 10k hour of operation, for example (there are ~9 thousand hours in a year).  3mm LEDs with better cooling conditions--probably longer.  Have a look here:
http://www.theledlight.com/LED101.html

This all depends on initial quality and running conditions, with some LEDs dimming to half of their initial flux output in dramatically shorter times. 
Title: Re: Keyboard LEDs
Post by: C5Allroad on Thu, 03 October 2013, 16:52:33
Interesting. So I see why some people don't really like backlit boards... There are 104 more things that can break. I might just a buy a filco or maybe not since I usually use a board for a year and end buying another.
Title: Re: Keyboard LEDs
Post by: Photoelectric on Thu, 03 October 2013, 17:02:03
I don't know what you mean by "you guys" :)  Some of us really like backlit keyboards!  ;D
Title: Re: Keyboard LEDs
Post by: rowdy on Thu, 03 October 2013, 17:06:14
I suspect the caps lock LED in my first Ducky Shine has died :(

so why u scream so much?:P

I no scream!

Interesting. So I see why you guys don't really like backlit boards... There are 104 more things that can break. I might just a buy a filco or maybe not since I usually use a board for a year and end buying another.

Over a period of years, during which the keyboard might get swapped out and thus prolong the life of the LEDs even longer.
Title: Re: Keyboard LEDs
Post by: acer589 on Thu, 03 October 2013, 18:03:46
Yeah, it seems like something you don't really need to be worried about.
Title: Re: Keyboard LEDs
Post by: C5Allroad on Thu, 03 October 2013, 19:17:38
I don't know what you mean by "you guys" :)  Some of us really like backlit keyboards!  ;D
Lol I fixed that now. I wasn't really thinking.

I suspect the caps lock LED in my first Ducky Shine has died :(

so why u scream so much?:P

I no scream!

Interesting. So I see why you guys don't really like backlit boards... There are 104 more things that can break. I might just a buy a filco or maybe not since I usually use a board for a year and end buying another.

Over a period of years, during which the keyboard might get swapped out and thus prolong the life of the LEDs even longer.
Lol that's a bit obvious don't you think? When I put my ducky on max brightness is that the max the led is designed to be ran at, or is it the maximum a manufacture is allowing the user to have it go up to?
Title: Re: Keyboard LEDs
Post by: PointyFox on Thu, 03 October 2013, 21:27:27
I don't know what you mean by "you guys" :)  Some of us really like backlit keyboards!  ;D
Lol I fixed that now. I wasn't really thinking.

I suspect the caps lock LED in my first Ducky Shine has died :(

so why u scream so much?:P

I no scream!

Interesting. So I see why you guys don't really like backlit boards... There are 104 more things that can break. I might just a buy a filco or maybe not since I usually use a board for a year and end buying another.

Over a period of years, during which the keyboard might get swapped out and thus prolong the life of the LEDs even longer.
Lol that's a bit obvious don't you think? When I put my ducky on max brightness is that the max the led is designed to be ran at, or is it the maximum a manufacture is allowing the user to have it go up to?

Maybe, and yes.
Title: Re: Keyboard LEDs
Post by: C5Allroad on Thu, 03 October 2013, 21:41:47
Ah ok thanks.
Title: Re: Keyboard LEDs
Post by: rowdy on Sat, 12 October 2013, 20:09:35
It may be the connection (solder joints).  LEDs generally don't burn out--they fade in brightness over time.  It's accelerated by heat and humidity.

I swapped keyboards around again, and now that the Ducky is on my Mac the Caps Lock light is working again!

The KeyCool which was on the Mac with the Caps Lock light working is now connected to my server (Ubuntu in text mode) and Caps Lock on that does not work.

So I suspect it is just something Linux is doing, or not doing, that is preventing the LED from lighting.