At 02:36 PM 3/18/2004 +0100, you wrote:


>Depending on the LED construction, the luminous intensity goes linear,
>exponential or piecewise decreasing linear with current. Look at the curves,
>for example, in this datasheet: (luminous intensity vs. forward current)
>http://www.avc.ru/binaries/16395/TC1211HWA.pdf
>So, depending on the LED type, pulsing with 8*the current with 1/8 duty cycle,
>will give a higher, equal or lower luminous intensity :o)
>
>All depends on the specific leds inside.
>Koen

Yes, modern LEDs generally don't show much difference. At least above the
flicker fusion frequency, which, of course, is where a display would be
operating. For visual indicators such as alarms you can get more apparent
brightness per average mA by flashing at a high peak current.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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