Thread: LED (Flashlight) Durability
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petur is offline petur
2011-01-17 , 09:00
Posts: 650 | Thanked: 497 times | Joined on Oct 2008 @ Ghent, Belgium
#11
Originally Posted by aligatro View Post
why wouldn't it last ? It's an LED, not a flash bulb like on the older phones. LED have a very long life expectancy.(7 years irc)
Originally Posted by Switch_ View Post
LED's do not generate heat. You wire a resistor in series with them to ensure that the voltage they see never goes above a certain level, and this controls whether they heat up or not. An LED *should* have virtually limitless lifespan, and it is more likley that the other components of the circuit will give way before any LED will.
Let me update you guys on the current state of affairs. In many applications where LEDs are used as flash, the LED is driven a much higher current then it was designed for.

Also LEDs DO GENERATE HEAT if you talk about high power LEDs. The small ones that are used as indicator lights obviously not.

A lighting product we developped at our company used powerLEDs at higher current, because the spec has an average power number, and also a much higher peak power number. At some point, the software failed (wasn't me!), and the LED stayed on. For a while. Then it went dead.

So, before you start spreading your facts, read up on the matter. It may very well be that the n900 flashes its LED at its peak current, above the nominal (average) power, causing them to overheat and die.

So thanks to the OP for taking the risk and letting us know they hold out pretty good
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