Silly newbie resistor question
Harry Bissell
harrybissell at prodigy.net
Sun Apr 30 18:46:45 CEST 2000
As I have always said...
"Whats an order of magnitude among friends...."
(Rene is correct of course...)
H^) harry
René Schmitz wrote:
> 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
>
> transconductance | uzs159 at uni-bonn.de
> isfutilepreparet | http://www.uni-bonn.de/~uzs159
> obeassimilated.. | http://members.xoom.com/Rene_Schmitz
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