Quote:
Originally Posted by jwoody
Thanks for that.
Just so I know, why can't you use a potentiometer as a variable resistor?
I have seen it in other light boxes and it seems to work ok.
Just curious.
Jeremy
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Potentiometer (unless it is high power type, wire-wound) on it's own can't handle currents involved, because voltage drop across it creates power dissipation, which may be quite high (similar to power consumption of the load - LEDs in your case).
That is why you need more sophisticated equipment.