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Thread: LED Challenged
picon face BY : Spehro Pefhany email (remove spam text)

At 08:02 PM 5/29/00 +0530, you wrote:
>why would anyone want to use a PWM thru a 555 waveform to change the
>intensity of an ordinary LED?.....if u req a large sensitivity use a small
>FET , or somethg in series with the LED or somethng.. of course u need a god
>amt om resistance calulations and make sure no surge current in LED et al.

Why would anyone what to reduce the brighness of the backlight?

Maybe to save power and extend battery life?  PWM will do that.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
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In reply to: <7A1D89E372A9D31193420060086857D557F84A@PLUTO>
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