In article
,
Victory wrote:

Sure, I will bite, if only for Arfa sake because he doesn't seem
grumpy.

1) The pot varies the resistance of current going to the LED. So, as
you turn it, the current gets stronger or weaker (brighter or dimmer),
until it is turned off.
2) The widely spaced terminals are for the OFF/ON switch of the pot.
I tested those separate and they turned the LED off and on as far as I
could see. When the current is interrupted by the switch being in the
OFF position (ie; the circuit not completed), the LED receives no
power from the battery. When the switch is turned on, the circuit is
complete and therefore the LED receives power from the battery.

How does that sound?


Surprisingly credible. You've gained more than I suspected.