Blue LED laser death rays
- Thread starter PardonTheWait
- Start date
Skyfall said:
Well global warming is supposed to produce hotter, drier summers and milder, wetter winters. The floods of the last couple of weeks have been caused by a cooler and wetter summer, completely the opposite to what is predicted.
Soldato
It is strange considering Blue LEDs are much more expensive than red/green ones. At our school in the electronics labs the green/red LEDs were in a giant tub and the UV/blue ones were locked away.
I've got a Selphy Photo Printer next to my laptop and when I'm trying to sleep and turn all the lights out, the single blue led illuminates the entire room as if there's a huge candle on the desk.
I've got a Selphy Photo Printer next to my laptop and when I'm trying to sleep and turn all the lights out, the single blue led illuminates the entire room as if there's a huge candle on the desk.
Soldato
I love my laptop because its a Lenovo (IBM) which uses all green LED's which firstly I think look better and secondly are very dull. My Logitech Z5500's are very different however.
On the main control panel there is a very large blue and very bright LED which is blinding. I have to sit right opposite it when watching tv so late at night it really starts to hurt my eyes. I might just stick some bluetac over it
. Im sure theres some people on the forums with Z5500's - does the LED bother you?
On the main control panel there is a very large blue and very bright LED which is blinding. I have to sit right opposite it when watching tv so late at night it really starts to hurt my eyes. I might just stick some bluetac over it
. Im sure theres some people on the forums with Z5500's - does the LED bother you?
Soldato
Global warming does not affect climate in this way, infact it will eventually lead to an ice age...Amp34 said:Well global warming is supposed to produce hotter, drier summers and milder, wetter winters. The floods of the last couple of weeks have been caused by a cooler and wetter summer, completely the opposite to what is predicted.
In general the forcast is more rain all of the time, rain water absorbs heat lessening the ambient temperature this summer. The rain is caused by more water being evaporated into the atmosphere and/or the weather patterns shifting as a result of different air preassures around the globe.
AFAIK for this part of the world it means more rain all the time... and a move towards a similar all year round temperature.
Skyfall said:
Not quite what my lecturer told me, although that could be because I forgot half of it in the holidays.
Although the will in the ice age statement is wrong, there is a chance it couud cause an ice age in the near future (say thousand years) but the most probable date will be in the pretty distant future (say 10-20+ka). At the moment we are only just coming out of an ice age (we are not actually out of it yet).
Anywho I was just commenting on that specific statement with the general wisdom at the momemt, that global warming is supposed to bring warmer drier summers (like the last few years), removing all of the more complicated stuff like extreme weather and the fact climate is measured over a much longer time than a year.
Man of Honour
Mohinder said:Her name's Elara, she's a Suicidegirl. You'll have to google it
Ummm....really really odd..
Soldato
I have just noticed how bright the blue LED on my 2nd monitor at work is now, haha.
Soldato
If you want bright, check out the Nichia CS binned white LED's. Twice as bright as previous 5mm white leds. 
They have a higher forward voltage compared to red or green leds. Usually red/green leds are ~2.2v while blue/white leds are ~3.2v depending on the make an model. It's up to the OEM's to choose how bright they want to tun thier LED's. You can undervolt them and they will run dim and use less current therefore power. You can also overvolt them for increased brightness, like you would OC a PC.
Finally, the global warming comment - I hope for your sake you are being sarcastic.
1 x Blue LED 3.2v 20ma = 0.064W
How much is 1KW/hr? A few pence?
1000/0.064=15625 hours
651 days
So you would have to leave on a blue LED on for almost 2 years before you would use 1 KW hour!
(or you could leave a 100W lightbulb on for 10 hours...)
Rubbish. Blue and white led's cost a fraction more when you buy 1000 or more.BenST said:
Again, rubbish...BenST said:
They have a higher forward voltage compared to red or green leds. Usually red/green leds are ~2.2v while blue/white leds are ~3.2v depending on the make an model. It's up to the OEM's to choose how bright they want to tun thier LED's. You can undervolt them and they will run dim and use less current therefore power. You can also overvolt them for increased brightness, like you would OC a PC.
Finally, the global warming comment - I hope for your sake you are being sarcastic.
1 x Blue LED 3.2v 20ma = 0.064W
How much is 1KW/hr? A few pence?
1000/0.064=15625 hours
651 days
So you would have to leave on a blue LED on for almost 2 years before you would use 1 KW hour!
(or you could leave a 100W lightbulb on for 10 hours...)
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- 26 Aug 2003
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greenlizard0 said:Ummm....really really odd..
Odd? It's pictures of girls with no clothes on, how is that odd? I think it's quite pleasant.
Soldato
Ja, its probably just a little blip, but more and more blips are tending to happen recently.Amp34 said:
I find it funny though when its on the news and they say "its the wettest summer in 100 years" obviously things cant be that bad that werent bad 100 years ago
Permabanned
MikeHunt79 said:
Doubtful.
MikeHunt79 said:
Average current for a red/green LED is 2-5mA, average for a blue LED is 20mA>.