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Questions tagged [fan]

A device that produces air movement by way of blades or surfaces attached to a rotating motor.

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1answer
63 views

What type of motor is this? (photo included)

I want to make this motor work, but I can't understand what type this is. I supplied 5V DC to the terminals, but it just kept buzzing and the coils were energized. It also had some kind of circuit, ...
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0answers
45 views

Fixing an old fan wiring [on hold]

I picked up this old fan which is apparently not working. I don't know much about electrical engineering but I can solder and connect cables and wanna hope that the problem is small enough to allow me ...
1
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2answers
57 views

Can I use a pc case fan for a tumble dryer? [on hold]

My tumble dryer is broken. I found the service manual online and according to the error number the heat pump fan is the problem. I open it up and to my surprise I found a standard sized case fan in ...
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0answers
24 views

Potentiometer Selection for Fan Speed Control [duplicate]

I am making a stir plate out of an old PC fan, variable resistor, and DC power supply from this tutorial. I have two power supply's to choose from, their outputs are: PS1 = 12Vdc, 2A PS2 = 12Vdc, ...
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votes
1answer
28 views

dual fan cpu cooler question [closed]

As stated in the page titled "Fan and heat sink - suck or blow?", "Obviously, the best result can be achieved with a dual-fan design, like this one, where one fan blows in, and another suck the air ...
2
votes
2answers
70 views

What is the best/safest way to wire a 200V fan in the USA, using 120v or 240v? [closed]

I bought a surplus fan/HEPA filter unit for using in a clean room. The wiring diagram is here. I want to connect it to a power cord and plug it into the wall. I know basic electric, but I'm not sure ...
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0answers
32 views

Is it possible to electronically control the physical speed switch on air movers?

I have a few consumer level air movers (Xpower) that have a 3 speed physical switch. Is there a way I could replace the physical switch with something that would interface with a microcontroller to ...
1
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0answers
57 views

4-pin PC Fan PWM control and speed monitoring

I want to control and monitor the speed of a 4-pin PC fan using an esp8266. When there is no PWM control signal sent to the fan from the esp this code reports the fan speed correctly. However, ...
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1answer
30 views

Is it safe to power a PC fan (12V 0.30A) with an adjustable power adapter (3 -12V 2A) for an extended period? (8 hrs/day, 365 days/year) [duplicate]

I bought a DIY air purifying kit that uses a PC fan to pull air through a HEPA filter. A blade broke and so the fan needs to be replaced. I want to buy a better quality fan, for example from Noctua. ...
0
votes
1answer
50 views

Control a fan motor (with PWM IC burned out) [closed]

After the IC fan controller burned out by a voltage error I pulled it out to see what the motor coils were like. They are so I think: 4 series coils, but I'm not sure if it's the 4 coils in series. ...
0
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1answer
44 views

Should I use constant current or constant voltage drivers for driving my PWM 24V DC Fans?

Hi everyone thanks for stopping by to lend your thoughts. I need to run 2 circuits separately and control via Arduino uno PWM. One circuit is 2x Noctua NF-A14 industrialPPC-24V-3000 Q100 IP67 with ...
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3answers
67 views

How to make a fan speed regulator with a pot and a voltage regulator?

I want to make a simple fan speed regulator, but my electronic skills are failing me. I want to be able to slow down two computer fans. I have in my hands a 12V/1A power suply, 2x 12V/0.2A fans, a ...
1
vote
2answers
83 views

Can a button control a 5 speed fan without a microcontroller?

Is it possible to control a fan with a single button that cycles though fan speeds without using a micro controller. Can anyone point me to some documentation on how this would work or any ideas how ...
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0answers
30 views

How will the ceiling fan behave if I put unequal turns on different slots of same coil?

Recently I opened a ceiling fan in my home trying to understand its basic operating principle.While i was through it a few questions popped up in my mind, which are as follows:- 1.What will happen if ...
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0answers
23 views

Can I control a Sanyo Denki fan to operate with uniform noise?

I bought this replacement Sanyo Denki fan for my air purifier. The sound out of that fan is louder than the other two pre-installed fans. The original fans mfg is out of business, and replacement ...
2
votes
1answer
57 views

What type is this fan motor and how best can I control its speed?

This is from an old Westinghouse fan and I am not clear on this motor type and how to best control its speed.
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1answer
145 views

Which wire is the positive and which the negative on this fan? [duplicate]

Here is link with the picture of the fan: The fan name is "ZALMAN ZM-F3(SF) 120MM ULTRA QUIET FAN" I looked it up online, but I don't understand, I'm colourblind and it's difficult to distinguish ...
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votes
1answer
48 views

Running a 12V PWM Water pump on a 5V fan output with tacho input

So on my 3D printer from Prusa they use 5V fans and monitor the fans by the tacho signal. I want to replace the hotend with a water cooled version and still want to have the safety feature to turn ...
3
votes
1answer
90 views

If wind rotates my fan, will it cause electrical problems?

I'm planning on building a DIY dryer booster, using this cheapo 220V inline fan: I plan to connect it to a temperature switch and a fuse, and connect it to the exhaust of my dryer. (I'm doing this ...
0
votes
1answer
52 views

How to drive 4-pin fan

I've been attempting to get this 4-pin brushless dc pc fan working for some time now. It has a red (+) black (-) blue (PWM in) and yellow (tachometer out). I only want this fan running at maximum ...
53
votes
3answers
7k views

Fan speed switch: why OFF :: HIGH :: MED :: LOW?

Many AC fans, including inexpensive floor models, have a rotary speed control which rotates from OFF to HIGH to MED to LOW. Since the switch does not rotate 360°, you have to rotate it backwards to ...
5
votes
3answers
776 views

How is air conditioner room unit fan motor controlled?

I have a custom project where I need to control fan speed with Raspberry Pi according to data it gets from various sensors. At first I need to know what my motor needs. For fans I use old air ...
5
votes
2answers
512 views

Can PWM affect a brushless DC fan given sufficient time?

tl;dr - Is driving brushless DC fans using PWM unhealthy for the fan compared to variable but steady DC voltage? If yes, why and how? The super simple ...
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votes
3answers
193 views

Can I use 1N4148 diodes instead of a 1N4001 diode for reducing the speed of a 5V 1.8W fan?

Looking at this 1N4148 datasheet, it seems that the forward continuous current is 0.3A, thus 300 mA. So if I add two in series, I will get 600 mA. I want to use diodes to reduce a 5V 1.8W fan speed. ...
2
votes
3answers
317 views

What is the technical name for fan that produces electricity?

I'm wanting to create a wind powered LED similar to this one, but weather proof. I know there's tons of them out there, but I'm wanting to build it from scratch. My issue is that I'm completely ...
-2
votes
1answer
93 views

4-Pin Fan with PWM dc motor controller(not a fan control unit) [closed]

Can I use a DC PWM module (not a fan control unit) for a 4-pin fan (directly to 12v and GND)? something like this module wiring will be motor+ to red and motor- to black. does this method shorten the ...
0
votes
1answer
82 views

What kind of connector is this, where can I get one, and how do I attach it?

I have to replace a fan in an older (circa 2010) NAS storage device, and I found a replacement but the wires don't terminate in a connector (see first image below): The old connector looks like this: ...
2
votes
2answers
305 views

Ceiling Fan Speed Control stripped down

I am a novice but know enough to get by. I was given an older Hunter Fan that is only operated via Remote. I have cut the receiver out because I do not have the remote and from what I have read they ...
1
vote
0answers
75 views

What fan could I use to extract hot air from an oven?

I am making an reflow oven. I've decided to use the picoReflow to do the job and monitor it. The oven is originally a lab oven, and it doesn't cool quickly at all. It has a vent at the top which I'd ...
2
votes
1answer
513 views

how does ceiling fan remote implement reverse function?

Most ceiling fans come with a remote control transmitter/receiver pair. The transmitter is hand-held or wall-mounted, and the receiver is installed in the ceiling box. Input to the receiver is a 2-...
0
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0answers
51 views

Control 12V Circuit with 3.3V Gpio

I have a fan with its own power-supply running at 12V, with 0.11A / 1.32W. The fan is capable (tested) of running at 5V with lower speed also, and has 3 pins, the third (I suppose for fanspeed-...
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3answers
804 views

Running 12V PC Fan with 9V Battery

i got an old PC fan which according to its label runs at 12V drawing 0.14Amps. I would like to run this with a 9V Battery so that it doesnt go too fast. Does this make sense? How long would the fan ...
0
votes
1answer
79 views

Bypass button press on fan for direct power on when plugged in

I have a fan that I want to plug into a thermostatically controlled power outlet so that the fan comes on when the temperature reading reaches a certain set point. The fan is currently wired through ...
0
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0answers
53 views

How to power a 12V 0.05A computer fan? [duplicate]

I have a Noctua NF-F12 computer fan (specs: https://noctua.at/en/nf-f12-pwm/specification). I also have a Samsung USB Wall Adapter (Originally for charging my tablet). The USB Wall Adapter says it can ...
1
vote
3answers
158 views

Output voltage of USB FAN

In my recent project, I'm working on 5V DC USB fan's speed controlling. My fan motor looks like below: Here fan controlling is done by PWM which is coming from Arduino NANO controller. For ...
0
votes
1answer
78 views

Fan voltage fluctuating with potentiometer [duplicate]

I am driving a two side by side fans (original Xbox 360) from 20v, 4A source via a 12v regulator and a 10k trim potentiometer. The goal is simply to adjust voltage between 3v-12v, nothing I havent ...
0
votes
1answer
47 views

ATX 12V power supply fan required or not at low current?

Does ATX power supply really need its cooling fan when drawing only 3A at the +12V rail? I know that the fan is mandatory when it's running a computer that draws 200 Watts and above but is the fan ...
0
votes
0answers
136 views

Using open collector output from fan sensor to opto-isolator for MCU GPIO

I have a cooling system that uses an external temperature sensor to turn on two HDF4020L-12HHB 12VDC fans and I need to use the locked rotor sensor outputs from the fans as inputs to a MCU (5V logic) ...
1
vote
3answers
4k views

Running a desk fan off a car battery: How long will it last? [duplicate]

I'm going on a road trip and will be sleeping in the bed of the truck at night. I want to be able to have a fan running during this time. I have a couple old car batteries sitting around, and I was ...
1
vote
2answers
77 views

Improve this schematic to guarantee 12V and 70 mA in the fan

I would like to learn how to correctly design a circuit to drive a fan using a mosfet and a battery as a power source. These are the characteristics: FAN Model: SPDL8025S Rated Voltage: 12V ...
5
votes
3answers
162 views

Is it safe to run a PC fan with power low enough to stall it?

I have a "6V 4.5W" solar panel (Generic) and a 12V PC cooling fan (Evercool PWR-1225H12B) that consumes 450mA at 12V full speed. Running the fan directly from the solar panel in full sun works ...
1
vote
2answers
68 views

External fan to come on when AC unit comes on.

I want to have an additional 120v fan come on when the AC unit is on. Am I able to wire that off the thermostat somehow?
-1
votes
1answer
45 views

Will 12V2A break smaller pc fans?

Currently I have a 12V2A adapter that powers 2x 12V0.3A/12cm pc fans. I want to bring in an additional 12V0.4A/23cm fan to the circuit. The question: can the new setup cause any harm to the fans or ...
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2answers
157 views

Voltage Divider For DC Fan

I have been researching various ways to control DC fans and out of curiosity bought a fan that has a 4-position switch with off, low, medium, and high settings. I thought that a voltage divider should ...
0
votes
1answer
359 views

Need Wiring Help For Aircon Blower Fan

I have an older working aircon with a broken control-board. Replacing the control-board is not worth the cost for this older unit. I am attempting to wire it as a simple "on/off" fashion. Where I ...
1
vote
1answer
33 views

Is it possible to rotate a fan by splitting the phases by 100 degrees?

I have learnt, a motor can rotate only when the main and auxiliary windings are at 90 degrees phase shift.but is it possible to rotate it in between 90 and 120 degrees.
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5answers
418 views

Controlling a 3-pin 12V 3A fan using a Raspberry Pi

I have a Highfine FFC1212DE 120mm fan that operates at DC 12V 3.0A max and want to control it variably using a RPi. The third pin on the fan is a tach reading, not pwm control. I'm looking to change ...
0
votes
1answer
305 views

need a schematic or info for wiring for a T35696-HP cooling fan motor

I have two T35696-HP cooling fan motors from an HP C7000 server rack. I am going to use the motor/fan with a DC source outside of the normal capacity as a cooling fan for a server. Therefore, I am ...
0
votes
0answers
128 views

3 phase fan speed autotransformer auto-restart

I have a 3 phase fan speed controller that uses a transformer to reduce the voltage in order to control the rotation speed of the motor. If the AC is failing I have to switch the controller to 0 and ...
0
votes
1answer
133 views

PWM on negative pin to positive (the common) PWM for a fan's control pin

I'm currently modding a 3D printer (Anet E10) by upgrading it's fan to a powerful 3.4A 12V fan. It's model is 9BMB12P2K01. The current layout on it's PCB does not allow such a powerful fan to be ...