All Questions
92
questions
2
votes
1
answer
298
views
4-pin 12 V PC fan - manual speed control
I've been reading a little about 4-pin PC fans, but haven't been able to find a clear answer.
I understand the PWM pin controls the fan's running speed, so if I wanted to use a 4-pin fan for a non-PC ...
- 467
0
votes
1
answer
42
views
How measure fan signal that not seems to the ground isolated?
I have voltronic inverter 3k fan stops with code 01 its mean fan need a replacement
old fan in pic-01 its use us62 ic so i order new fan pic-02 and its not working
first reason the cables reversed ...
1
vote
1
answer
43
views
Speed control fan with PWM and capacitor (no pwm fan)
For my project I want to control the speed of a regular non-PWM fan.
I was wondering if what I came out with is a good idea or not. I noticed that the capacitor I used (25V 47µF) gets a bit warm after ...
- 57
3
votes
1
answer
323
views
Transistor won't fully turn off when Fan PWM is connected
I'm trying to use a RP2040-zero to control a 12V PC fan that also has a PWM and tach connection. I'm using a transistor to turn off the fan completely as a 0% duty cycle on PWM doesn't turn the fan ...
- 133
0
votes
1
answer
69
views
RC filter to DC 12V, 3A fan PWM
This feels like a question asked hundreds of times before, yet doesn't seem to have a good solution. If a company could sell me a solution, I would buy it in a heartbeat.
I have a van with a 3A 12VDC ...
1
vote
1
answer
66
views
Is it possible to control speed of a 3 pin PC liquid cooling pump with one winding using PWM?
Back story:
I have liquid cooled PC where I can’t control fans and pump from motherboard headers (thanks HP). I decided to use DC/DC converters to power fans and pump. It is working, but since pump ...
- 41
0
votes
0
answers
39
views
4 wire PWM 4 stage controller
hope I got an idea to build this idea I had.
I want to build a 4 stage pwm fan controller, like 25%, 50%, 75% and 100% duty cicle.
I guess it could be done doing it with cmos 4017 with a pulser switch ...
2
votes
1
answer
347
views
Name of this 4-pin fan connector
I have a 40mm fan with a connector that has standard breadboard pin spacing. I would like to connect it to what I thought was a relatively standard fan connector that has wider spacing (and thicker ...
- 354
1
vote
1
answer
297
views
A simple solution to the PWM controlled DC fan?
I am trying to temperature control a set of 12V DC fans (2 wires) of mine.
I went down the pwm microcontroller output + mofset rabbit hole (increases the noise / can damage the fans), read about RC ...
- 111
0
votes
1
answer
97
views
How to run fans out of phase?
I am working with server fans. The noise generated by these fans is quite disruptive, and I've read that running them 180 degrees out of phase could potentially reduce the noise.
I'm looking for ...
1
vote
0
answers
149
views
Hardware based PWM fan solutions
HPE DL360P’s love to run these fans (8x of them) at max speed. I don’t really need them all running, but wasn’t sure if dummy plugs to just trick the motherboard was a good idea. Wiring length and ...
- 11
8
votes
2
answers
1k
views
Fan at full speed on PC - Is there anything I can do to slow it down? [closed]
The internal sensor for the motherboard is giving out an invalid value for the temperature, causing the fan to go on full. The computer is exactly 10 days out of warranty.
It's a 4 Pin 12v PWM fan. Is ...
- 441
0
votes
2
answers
1k
views
Getting rid of PWM fan noise
I have a 3D printer which has two fans, both running on 24 V. I want them to be very quiet, except for when really needed. I already upgraded to bigger fans, so running them slower would still give ...
- 261
3
votes
2
answers
192
views
Peltier module use improvement
I am trying to setup a box, where I can keep the temperature to constant/near constant number of degrees. I have chosen to use a Peltier module for cooling but the result isn't satisfactory.
A similar ...
- 31
0
votes
0
answers
137
views
PWM Fan Controller, inverted duty cycle
What I am trying to design is a 12 V DC controller for a PWM fan that uses a 100 Hz input signal and reversed duty cycle between 8 and 87 % to drive it. What I mean by reversed is that the fan is on ...
