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Unread 11-06-2002, 02:16 AM   #19
Brians256
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Join Date: Oct 2001
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The main point of PWM is efficiency, so the pots (just variable resistance) are used in a way that very little current flows through them. So, you could use tiny wattage pots.

In a rheobus, you are dissipating multiple watts in the resistors, but in PWM, you are dissipating small fractions of a watt.
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