I've read some discussion here about pulsing LEDs to achieve higher output without burning the stupid things out. (Instead of CW).
I'm just working on a circuit for general purpose low voltage illumination, but want to achieve maximum output.
I suppose a pulse of 100Hz would be decent? This would allow more voltage to be applied to the LED without overheating it.
So I was thinking of using a 555timer triggering a transistor (of what type?) handling approx 25 LEDs (no specific data on the LED yet, I haven't gotten that far ie: current, voltage, etc..., I'm researching that now).
I have a basic schematic that shows a 555 triggering such a circuit, just what transistor should work for me if I want to lets say switch a 6VDC/1A load?
Any info would be great, thanks!
BTW: I believe it was "Watson" that was telling us about his white LEDs that weren't lasting very long, well, I've been seeing a lot more white LED applications such as crossing lights, while the duty cycle is quite low, I suppose they expect these crossing lights (you know the picture of the person walking!) to last quite a while.
From what I understand, the Osram LEDs are of excellent quality, and priced a wee bit higher than the rest as well.