I guess lots of you still uses the old fashioned fan speed regulator like the one you see above. These speed regulators works with a copper coil as resistance to regulate the amount of current passing through to the fan. There is of course the speed dial ranging from 1 to 5 or sometimes 0 to 5 where 0 means it fan is switched off with no current passing through. 5 would mean all the current passes through offering no resistance at all. At speed level 5, the fan will be running at full speed. Anywhere in between 9 and [...] Read more »