All Questions
11 questions
3
votes
5
answers
2k
views
What is this 4-pin fan header?
What is the name of this 4-pin fan header, in the first image? This is from an Intel NUC motherboard, and there is 1.0mm between each pin. Will I be able to get and use an adapter for the much more ...
- 133
3
votes
2
answers
731
views
What is the proper name of this fan connector?
Does anybody know what the correct name for this fan connector is?
The female plug side is "Molex KK 254 Housing with Polarization Rib, 4 pin" https://molex.com/en-us/products/part-detail/...
- 155
0
votes
0
answers
44
views
How to control the speed of four 12 VDC fans across two sources?
I destroyed my fan hub and am trying to replace it with a simple circuit. My PC has a fan header that can power the 12 V DC (not PWM) fans, however, it only supports two fans.
So I am trying to power ...
- 1
4
votes
4
answers
4k
views
Will putting a resistor between a PC's fanheader pins convince the BIOS the fan is on?
Will putting a resistor between a PC's fan header pins convince the BIOS the fan is on? Will it catch fire? Do I even need the resistor?
How can I convince the BIOS the fan is on without a fan?
Edit: ...
- 167
1
vote
2
answers
973
views
Why can I use an AC power supply to spin DC PC-fans?
This question might seem a bit alarming and it did come up because of an inadvertency on my part.
I tried to reuse old PC fans for cooling and grabbed an old phone power supply that wasn't being used ...
- 157
1
vote
1
answer
2k
views
How to power 2x 12v computer fans with batteries & 1 switch
I am a total electronics newby (besides the odd solder repair) -
I'm trying to create a robot with my son out of an old tower PC and he'd like to use the fans for eyes.
I've seen that a fan can be run ...
- 11
0
votes
1
answer
362
views
How exactly does getting 7V by connecting both terminals to the 12V and 5V sources work?
When I Googled MOLEX pinouts and checked some questions on Stack Exchange. I saw interesting images where if you were to connect both the 5V and 12V ends of the PSU connector to a device, you would ...
0
votes
2
answers
67
views
How to choose the correct pc fan? [closed]
I need to replace a pc-fan 2 pin(80X80X25mm).
The only details it has are:12V/0.14A.(no RPM/CFM details).
Will those details(voltage/current)enough and i can pick any
80X80X25mm 2-pin pc fan which has ...
- 299
14
votes
7
answers
23k
views
What's needed to put a PC fan into reverse?
I've got a PC fan here (I've peeled off a sticker).
And although this one doesn't come with the usual 3 or 4 wire connectors, it has enough electronics in it to only operate when power + is on red, ...
- 287
6
votes
6
answers
15k
views
How can I adapt a 3-pin PC fan connector to a 4-pin connector?
My computer's motherboard uses all four pin fan connectors with no support for speed controlling the older three pin fan connector. The problem is, all the PC fans that I have use a three pin ...
anon
0
votes
2
answers
862
views
Simple PC fan controller PWM discrete components
Recently I switched some case fans in my pc to find the horror that the new ones were even louder than the old ones. After some quick checks just by eyeing and monitoring on my pc I can confirm the ...
