Quote:
Originally Posted by Newtious
use a pot to control speed of the fan (via voltage limiting) and DONT PLUG THE FUCKER INTO A WALL PLUG wall plugs are AC comp fans are DC.. hit a thrift store for an appliance that runs off a dc powersource.. anything that has a big black box that plugs into the wall instead of just a normal cord.. and READ.. MAKE SURE IT SAYS DC thoes fans will take up to 14 ish volts.. if you find one that is higher you can use resisters.. (or a POTentiomiter) to reduce voltage to a usable voltage but double check it says DC not AC
|
No!! Resistors are current limiting devices. A pot *can* drop voltage as can 2 resistors.
for a pot to reduce voltage wire it up like this.
------------------POS
|
|
\
/
\
/
|
|<----------------> to pos on fan (this is the divided voltage)
|
\
/
\
/
|
|
------------ GRND
Just get a pot or resistors that are rated for the power the fan is going to use.
Now if you notice, in this simple voltage divider, the resistors are not in series with the power, but strung across the rails.