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Will this work? Simple fan controller mod - Page 4

post #31 of 40
Excuse my horrible drawing, but why don't you just go with something like this? Will give you full 0-12v control

Edited by Liability - 12/20/08 at 6:13pm
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post #32 of 40
Thread Starter 
Quote:
Originally Posted by LiNERROR View Post
have done it with a SPDT switch for 12v-off-5v, haven't found a fan that wouldn't work at 5v...

but wanted a bit more control so moved away from a toggle and started using a real fan controller...


http://www.criticalvelocity.com/item.php?itemid=spdc06

15 AMP capacity... PWM and works from 5.5v to 36v... and can be controlled with pot, 0-5v, push button or clock... even has soft start... they have a few models with different features.
Yea I thought about doing that but then I need at least 3 of them for individual control. I decided to avoid using PWM and simply used a cable switch.

Quote:
Originally Posted by Liability View Post
Excuse my horrible drawing, but why don't you just go with something like this? Will give you full 0-12v control
Because switches are cheaper and I really don't need anything in between. When I am gaming, put it on 12V and when I am not gaming, 5V.
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post #33 of 40
http://en.wikipedia.org/wiki/Switch


I think you need a DPDT or DPDT switch http://upload.wikimedia.org/wikipedi...PDT-symbol.svg
Position 1: +12v and GND
Position 2: +5v and GND
Position 3: +12v and +5v
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post #34 of 40
If he only wants 5v and 12v, wouldn't SPDT do the trick? 5v and 12v on the leads, output connected to +fan.
Edited by Liability - 12/20/08 at 7:40pm
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post #35 of 40
Quote:
Originally Posted by Liability View Post
If he only wants 5v and 12v, wouldn't SPDT do the trick? 5v and 12v on the leads, output connected to +fan.
yes . there is no point in the DPDT
post #36 of 40
Quote:
Originally Posted by LiNERROR View Post
have done it with a SPDT switch for 12v-off-5v, haven't found a fan that wouldn't work at 5v...

but wanted a bit more control so moved away from a toggle and started using a real fan controller...


http://www.criticalvelocity.com/item.php?itemid=spdc06

15 AMP capacity... PWM and works from 5.5v to 36v... and can be controlled with pot, 0-5v, push button or clock... even has soft start... they have a few models with different features.
15 amp is that all :-) this is my custom 800watt PWM Booster it's designed to be used with 2 psu's
post #37 of 40
Thread Starter 
Hmmmm DPDT does allow for much better wire management though. Basically, with a DPDT I can solder the grounds and make it look nice and neat. What do you guys think. Soldering and time are not issues and the switches cost about the same.
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post #38 of 40
oh well do it then ..

by the way why dont you just buy a premade one ?
post #39 of 40
Thread Starter 
cuz they dont have anything that handles 30 watts without some ugly ass super bright blue leds
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post #40 of 40
Quote:
Originally Posted by OC'ing Noob View Post
Hmmmm DPDT does allow for much better wire management though. Basically, with a DPDT I can solder the grounds and make it look nice and neat. What do you guys think. Soldering and time are not issues and the switches cost about the same.
But, the more you tack on to this the more there is to go wrong.
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