Silly newbie resistor question

[René Schmitz]

At 12:02 30.04.00 -0400, you wrote:

>So we have to keep the power in the resistor below .125W. In real life a 1/8w
>resistor
>running 1/8 watt will get REAL HOT... so if you want it cool you need to
derate
>to about .8w max...

Huh?! 0.8W > 0.125W ! I think you meant 0.08W.

>Power = .8
>Power = Voltage Squared / Resistance.
>.8 = 30^2 / x
>.8 = 900 / x
>x = 900 / .8
>x = 1125 ohms

This turns to 11.2kOhms then! 

Bye,
 René 




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