How do you wire 120mm computer case fan?
- Thread starter jixan
- Start date
yea you need a 12v phone charger, cut the wires and match neg to neg(black) and pos to pos(red) then use electrical tape to wrap the two connects back up.
heres an image of a charger http://www.hobbyhome.ca/E-flite/Electric/EFLC4000-450.jpg
heres an image of a charger http://www.hobbyhome.ca/E-flite/Electric/EFLC4000-450.jpg
jixan
Active Member
That is a great start. I have been reading a lot about wiring today. I've learned about a technique called daisy-chaining.
I plan on having 4 120mm fans on each side of the cabinet. Does anyone know how you could daisy-chain the set of 4 together and have enough power to run all 4? I'm afraid that the single charger would not run all 4 fans, am I correct or incorrect with this assumption?
I plan on having 4 120mm fans on each side of the cabinet. Does anyone know how you could daisy-chain the set of 4 together and have enough power to run all 4? I'm afraid that the single charger would not run all 4 fans, am I correct or incorrect with this assumption?
Well if Im correct a 120mm fan runs 0.7 amps, check how many amps the charger can take and im guessing thats how much you can have. I would check with someone more experienced just in-case.
tip top toker
Well-Known Member
In that case buy a laptop trnasfomer box. RUnning 8 fans would require 8 individual phone chargers which is expensive and pointless. A brick from a laptop would require re-wiring though, personally i'd just buy an matx or shuttle powersuply, they're small and compact, and then you can run as many fans as you could possibly want off the one wall socket and the only modification you would need would be a paperclip 
jixan
Active Member
How about this. It's cheap, its 12v and 2Amps. That fans that I like are .7A.
http://www.amazon.com/Microseven-Power-Supply-12V-CCTV/dp/B002GM5SAC
This might be a winner!
*or this one
http://www.mini-box.com/24w-12v-2A-AC-DC-Power-Adapter
I am a little more inclined to try this one.
tip top toker
Well-Known Member
The paperclip is simply to short a black and green wire on the PUS, that's all you need to do and you just plug your fans straight in and they're going. You can also use speed controllers without complication in this manner.
jixan
Active Member
So would you open up the PSU and solder a paper clip on the hot wire and ground wire. Or am I missing the point... Please excuse my ignorance, I know not what I say. With that being said though I do have an extra laptop power supply that I could mod if that doesn't involve too much expertise. What needs rewiring?
tip top toker
Well-Known Member
No worries. You siply take your PSU, get the large 20 (sopmetimes 24) pin power plug that would connect to the motherboard, and roughly in the middle there will be a green ground wire. You simply take the paper clip and push one end into the metal pin hole thing on the power plug, and then bend the other end into one of the black wires copper connectors. Duck tape the sucker down and the moment you plug your PSU into the wall it will power up. You can buy fancy tools to do it (psu testers and such) but at the end of the day a paperclip is all you need.
So from that picture, you would simply short PS-ON and COM located directly beneath it (or any pin/wire labeled as COM). That is how a computer works, when it's plugged in, the pressing of the power button causes the PS_ON to be shorted and as such power the PSU up. It's a bit more dependable and depending on the PSU you buy you can be sure it's not gonna melt anything or fail etc.
So from that picture, you would simply short PS-ON and COM located directly beneath it (or any pin/wire labeled as COM). That is how a computer works, when it's plugged in, the pressing of the power button causes the PS_ON to be shorted and as such power the PSU up. It's a bit more dependable and depending on the PSU you buy you can be sure it's not gonna melt anything or fail etc.
jixan
Active Member
Almighty, man talk about a fantastic explanation. Thank you so much. Considering I would never use the 20/24 ATX power plug, could you safely clip it off?
To save space I would potentially clip all the power cords except the for two 12v 4pin molex strings that I would need. Or would this run you the risk of having things melt?
To save space I would potentially clip all the power cords except the for two 12v 4pin molex strings that I would need. Or would this run you the risk of having things melt?
tip top toker
Well-Known Member
I have noidea about the safety of cutting the wires, probably fine if you insulate off the ends. Personally i would just leave it all intact so that i can use it again should i want, that's ust me. Another good thing that you can plug onto those 12v molexs is water pumps
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