Re: LED rules of thumb

["Jon Payne" <jgpayne@xxxxxxx>]

Use Ohms law:

V=IR, so R = V/I

e.g. for 20mA at 12v

R = 12v / 0.02A = 600 ohms

However, the white/blue LEDs may have a large voltage drop (haven't
checked)
which I guess may effect things - anyone?

jon

----- Original Message -----
From: <ian.bird@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Tuesday, September 17, 2002 2:07 PM
Subject: [ukha_d] LED rules of thumb


[snip]
>
> Doing it this way should be safe for the LED and avoid the maths side
of
> things. I don't know the formulas off the top of my head so cannot
help
> with that at the moment.

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