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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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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 ...
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0answers
29 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
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1answer
67 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
691 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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1answer
160 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 ...
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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 ...
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1answer
409 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 ...
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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 ...
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3answers
2k 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
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3answers
2k 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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3answers
896 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. ...
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3answers
487 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 ...
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1answer
336 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 ...
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1answer
91 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: ...
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2answers
600 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 ...
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0answers
81 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
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1answer
1k 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-...
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3answers
4k 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 ...
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1answer
380 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 ...
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0answers
55 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 ...
2
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3answers
301 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 ...
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1answer
163 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 ...
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1answer
69 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 ...
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0answers
229 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) ...
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3answers
11k 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 ...
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2answers
95 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
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3answers
241 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 ...
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2answers
69 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?
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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
401 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 ...
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2answers
1k 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 ...
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1answer
35 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
725 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 ...
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1answer
625 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 ...
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1answer
197 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 ...
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2answers
182 views

How to fool power supply that it has DC fan installed

I have a couple of server power supply units, namely HP DPS-1200FB. Those PSUs are working just fine (given their mileage) but the DC fans appear to be wearing out so I decided to replace them. The ...
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0answers
130 views

PWM dimming with ZCD generates humming noise from fan at low speeds

I have created a circuit which implements PWM dimming using phase cutting with Zero cross detection which works well on incandescent bulbs but creates humming noise when connected to a fan. I am using ...
0
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1answer
209 views

Linear control, fan pulsing

I have a circuit that controls a fan linearly. I have a PWM output going through a low pass filter and into an NPN transistor for low side control. It worked well with at first, however when I ...
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1answer
199 views

Standard 12 Volt DC fan for PC: how much AC ripple can support? Does ripple increase noise?

I want to know which is the mechanical effect to run a DC 12V brushless common fan with a very basic and poor power supply (just a diode plus a low value capacitor, no regulation at all). In principle,...
-1
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1answer
370 views

Modding Copper Heatsink - Fans for Better Heat Dissipation

I have been working on a little project of mine in which I try cool a small peltier using this laptop heat sink fan. The peltier I am using is rated 10W, while the laptop fan is rated for 18W of ...
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3answers
303 views

What's this triac-based device that controls the lamp in my ceiling fan?

I have a Harbor Breeze (Lowes) ceiling fan with a defective light, but with a working fan motor. (A tree fell on my service drop, cutting the neutral wire but not the ground or 240V line wires to my ...
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2answers
275 views

Fan PWM driver - design question

I've been working on crating a simple PWM fan driver for my Raspberry Pi. To simply explain idea - I get 3 pin input (1 - PWM, 2 - 5V, 3 - GND), then using RC filter I turn PWM signal into voltage and ...
5
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2answers
748 views

Part number for this Molex 4 pin wire-to-board connector (or similar: Foxconn, Wieson, Tyco, etc)

I'm having a really hard time finding the correct PN for a 4 pin header, used with PWM fans. The header I'm looking for is a 4 pin one, similar to the Molex 47053-1000, but a right angle one. I've ...
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1answer
107 views

Why Duracell Security MN21 12 V 23A Alkaline Battery cannot provide 12v to Computer Fan 12 V 0.16A [closed]

Fan spinning only at 5V (~600 RPM). Why this happened? The fan should spin at full speed.
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2answers
295 views

Y.S. Tech Fan 4 wires, but which is which?

I've a Y.S. Tech fan with 4 non-standard colored wires connected in a UPS, and I want to replace that fan with a bigger standard 4pin fan doing a "UPS case mod". Motivations aside. Here I want to ...
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3answers
1k views

If I lower the volts on a computer fan will the needed amps increase? Im new too electrical engineering (updated)

I have a computer fan that I am using for a school competition. The rules state that voltage used can be no higher than 9 volts but most fans are 12 volts. The fan that I have is has a recommended 12 ...
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3answers
560 views

MIP2M4 mosfet, Arduino Uno and a 12v PWM PC fan

First, I'm am new to using transistors and MOSFETs in electronics circuits. I have extremely basic notions of electronics, and am able to setup and use "of the shelf" boards and Arduino modules, and ...
0
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1answer
518 views

What kind of motor is used in electric room heater?

I did enough surfing to know about the kind of motors used in electric room heater, but not able to finalize. The principle seems like working of an induction motor with a electromagnetic stator but ...
0
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1answer
58 views

Fan control using oscillator with varying capacitance

We have been working on a small project trying to build a fun game but are having some issues. We basically need an oscillator that can be controlled by varying the distance between our hands and a ...
0
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1answer
348 views

Adding Peltier module to an evaporative cooler

I'm planning to add a two Peltier module (TEC 12706 with heatsink on both sides) on a evaporative cooler but I cannot decide where should I put them. Here's the idea: Idea B would be good but I'm ...