At 01:40 AM 3/26/2004 +0100, you wrote:
>
>This is another thing I'm concerned with.
>How is power calculated in a transistor? Something like...?:
>
>    P~=Vce(sat)*I=0.25*0.24=0.06W ???

Yes, that's how to do it.

>
>Asumming Q2 dissipates 60 mW, How can I get a rough approximation of
temperature rise?
>In page 1 of the datasheet there's a suspicious parameter called:
>Thermal Resistance, Junction to ambient = 357 :C/W
>
>0.06W * 357:C/W = 21.42:C
>
>Did I calculate something useful (eg: temperature rise)? :)

Hey! You said you were not a hardware person! But you have all the right
answers! Very good!
>
>All your answers were very helpful. Thanks!

You are getting lots of good experience now!
Good luck
Tom

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