(A rehash of an earlier, lost, posting)
I am trying to quieten the fan in my 550W PSU by using an old radio-spare 50ohm potentiometer. It is a solution I sort of understand although a neater looking one - http://www.heatsink-guide.com/content.php?content=control.shtml - was mentioned in a search of All About Circuits.
My questions are these:
a. Is this better done by making a voltage divider circuit - a la Vol1-DC Chap 6 - or a straight rheostat? Any different dangers/gotchas to accommodate?
b. ..and this where I admit to being a total newb at electronics... is putting a 50 ohm resistance across the power in as in the voltage divider not likely to 'short' the power somewhat and cook the pot? I would rather be told than learn by damaging what I have as it seems to be hard to get a 5W pot these days from Maplins et al.
Many thanks in advance,
I am trying to quieten the fan in my 550W PSU by using an old radio-spare 50ohm potentiometer. It is a solution I sort of understand although a neater looking one - http://www.heatsink-guide.com/content.php?content=control.shtml - was mentioned in a search of All About Circuits.
My questions are these:
a. Is this better done by making a voltage divider circuit - a la Vol1-DC Chap 6 - or a straight rheostat? Any different dangers/gotchas to accommodate?
b. ..and this where I admit to being a total newb at electronics... is putting a 50 ohm resistance across the power in as in the voltage divider not likely to 'short' the power somewhat and cook the pot? I would rather be told than learn by damaging what I have as it seems to be hard to get a 5W pot these days from Maplins et al.
Many thanks in advance,