Questions tagged [fan]

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

Filter by
Sorted by
Tagged with
1
vote
0answers
23 views

12 V PWM fan and Wemos D1 Mini - ground loop?

Newbie here. I'm trying to power a 12 V 4-wire fan and a Wemos D1 Mini from the same power source. The aim is to use a Dallas DS18B20 temp sensor and increase/decrease the fan speed as per the temp ...
0
votes
0answers
56 views

Finding the type of a burnt component [closed]

I had a fan go out on me recently and opened it up to find a transistor fried. When I tried to move it to see if anything on it is still readable it disintegrated. Probably not the best idea but i ...
0
votes
0answers
19 views

How do i control the speed of exhaust fan as the same way of controlling household fan? [duplicate]

I want to control the speed of this exhaust fan the same way household fan speed regulator works (The speed is discrete, using 0,1,2,3 button. the higher the button the faster fan spin) how do i do ...
0
votes
2answers
125 views

5V 4-pin Noctua A4X10 on Raspberry Pi

I want to connect a NOCTUA NF-A4X10 5V PWM 4-pin fan to a Raspberry Pi 3B. The below is the circuit I'm planning to use. (EDIT: Flyback diode (such as a 1N4001) is not needed since Noctua already ...
0
votes
1answer
22 views

Nidec gamma32 4pin pinout

I have Nidec Gamma32 D12F-24BS4 15BH2 blowing fan cooler. It has very strange coloring for wires: red-white-black-yellow. Probably two of wires are GND and +24v ...
0
votes
2answers
45 views

Female 4 pin fan header

While male 4 pin fan headers are plentiful (e.g., here), I can't find a female version of it. I see lots of them on fan extension cables, but none that can be soldered to a PCB. Does anyone know a ...
-1
votes
2answers
64 views

Can I run 24 V DC fan with on 18 V DC? [closed]

I have got a coffee machine which had its cooling fan died. The current fan is 18 V DC but the only replacement fans I can find are 24 V DC. Will that be a issue ? Thanks.
0
votes
1answer
33 views

Replacing Projector Fan - Wiring Color

An old Sony VPL-CX11 stopped working because one of the fans (the lamp's one) was so rusty that couldn't rotate. In the front of the projector there are two fans, one for the lamp and the other for ...
0
votes
1answer
25 views

12V Pump not working

I have interfaced a 12 V pump and a 12 V fan to LPC2138, there are 3 5 V sensors interfaced, according to which the fan and pump function. The whole setup is in PCB. There is a ESP8266 module ...
0
votes
2answers
64 views

Powering 5 fans with a LTC 3780 : should I protect it against induction effect?

I want to power 5 fans in parallel (12V 0.80A, each) using a adjustable power supply (DIY, made with an LTC 3780 connected to a 24V 15A PSU and mini Voltmetre). I read that a fan could destroy the ...
0
votes
1answer
46 views

PWM fan with PWM wire disconnected [closed]

What will happen when the supply and ground are connected for a CPU fan with PWM but the PWM wire is not connected? Will the fan run at its full speed?
0
votes
1answer
35 views

USB internal control to on/off a pc fan molex circuit

I am new to electronic circuits so I might not have the correct nomenclature for some items. Description: I have 3 high power 12V PC fans (NON PWM) connected to a hub that draw power from MOLEX ...
0
votes
1answer
50 views

Will it harm a PWM fan controller to be backfed full fan voltage?

I want to install a PWM controller to a small 12 volt furnace fan in a camper. I want the fan to run slowly after furnace shutdown, to quietly stir the air for more even heating. My thought is to ...
0
votes
1answer
37 views

Help understanding amperage of DC motor and heat generation

I am diagnosing an issue in an automotive HVAC system and have been testing the blower motor. I would expect somewhere approximately 8A to 15A of current draw. I have test wired the motor with 14AWG ...
0
votes
1answer
46 views

How can I check the voltage of a fan?

Is there a way I can connect 1 or 2 batteries to a CPU Fan that I dissasembled to check what voltage it is so I can use it at the highest speed?
1
vote
1answer
43 views

Trouble to find out the nominal motor current and motor type of a fan from its datasheet

Is there a way to find out what is the nominal current of this fan and what type of single phase induction motor is used?
0
votes
1answer
51 views

How to power a dc fan (4wire) [closed]

I have intel dc 12v cpu fan (removed from a computer) that has 4 wires (Black Yellow Green Blue) (Model E97379) [Photo- http://www.filetolink.com/c50ea25682 ] I want to power it by ac to dc 12v ...
0
votes
1answer
55 views

What kind of fan connector is this?

I need to change fans of my beamer but I cant find a replacement because I dont know which connector they used. Thought it would be an 3 Pin connector but it isnt. The connector in the pictures is ...
0
votes
1answer
43 views

Thermoelectric Cooler sensor

My team and I are testing our Peltier Thermo-Electric Cooler Module+Heatsink Assembly - 12V 5A from Adafruit. We are using an external power source and sensors to get readings for the current, voltage,...
1
vote
0answers
50 views

Air conditioner fan not starting

I have a problem with my air conditioner fan not starting. As seen from the schematic below, when I test for voltage between the brown and black wires, I get 0 V (this is the problem). The indoor unit ...
0
votes
2answers
54 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 ...
2
votes
1answer
193 views

12V PWM controller for 12V fan that gets faster with the COLD

I need a controller for a 12 V - 1A fan, blowing on the cold side of a Peltier element to keep it at constant temperature. I have the hot side under control. I have seen multiple cheap PWM ready-to-...
0
votes
0answers
73 views

Repair or reuse 4-wire pwm pc fan that I broke by swapping GND with 12v

It is a 4-wire PC PWM Fan that I broke by swapping the GND and 12v for 2-3s. I did it because I thought it could reverse the direction like in other motors. So, something is dead in the fan. I remove ...
0
votes
3answers
99 views

Why does a car cabin fan need a big resistor?

The blower motor resistor for the cabin fan in a Volvo 850/V70 is so big that it is not even part of the motor. It has its own mounting. Here is a picture: Why does the blower require such a large ...
0
votes
0answers
100 views

Ceiling fan speed controller question

I need to connect 15 ceiling fans. Each bay has 3 ceiling fans that will run of the same speed controller, so 5 controllers in total. They will be wired from a separate circuit from the DB box. Here's ...
0
votes
0answers
37 views

What if voltage is decreased for an electrical fan (DC Motor)

Will the speed of rotation decrease or increase? I have an idea of Lorentz Force and all that. Use P=VI and V=IR to explain this to me please. I can't understand what will be the outcome of decreasing/...
0
votes
1answer
123 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, ...
1
vote
2answers
63 views

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

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 ...
0
votes
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, ...
2
votes
2answers
110 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 ...
0
votes
0answers
34 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
vote
1answer
1k 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, ...
-1
votes
1answer
439 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
68 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
votes
1answer
67 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 ...
0
votes
3answers
310 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 ...
0
votes
2answers
134 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 ...
0
votes
0answers
31 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 ...
0
votes
0answers
25 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
65 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.
0
votes
1answer
491 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 ...
0
votes
1answer
120 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
94 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
264 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 ...
55
votes
3answers
8k 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
1k 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
3answers
1k 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 ...
0
votes
3answers
650 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
416 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
229 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 ...