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Putting a switch on a 3pin fan. Which wire?

post #1 of 8
Thread Starter 
I have a spare simple switch that i want to use to control my two desktop fans to cool my fans. They plug into the back of my PC, but it is somewhat of a hassle to unplug / replug them when i walk away and leave folding on.

So i want to control them with a switch, it's just a 3pin wire, but i'm not sure which wire i should connect the switch to. It's just a simple 2 wire switch, nothing special.
post #2 of 8
By opening the circuit on either the red or black will turn them off.
I'd do the blacks or grounds.
    
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post #3 of 8
Thread Starter 
Alright i was thinking black would be best also, i'll post if it works in a few minutes heh.
post #4 of 8


Put the switch inline with either the +12v or GND. It really does not matter if ground or live unless you are doing more complex circuits.
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post #5 of 8
Yep I had to do this sort of thing recently in one of my Electronics class projects.. just adding a switch onto a battery clip. I used the red wire.
    
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post #6 of 8
Thread Starter 
K that was easy heh, just stuck it on the black wire and it works.
Now i just need to insulate with some hot glue, but i'll do that later.

post #7 of 8
Quote:
Originally Posted by Dezixn View Post
K that was easy heh, just stuck it on the black wire and it works.
Now i just need to insulate with some hot glue, but i'll do that later.

Solder it first. Just in case the wire gets loose.
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post #8 of 8
insulating with hot glue ftw. but solder is a must.
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