computer fan control
the present disclosure relates to computer cooling, and particularly to a computer fan control system .
22. the computer of claim 20, wherein the control circuit comprises a tl594 control chip .
22. the computer of claim 20, wherein the control circuit comprises a tl594 control chip .
fig. 1 is a block diagram of an exemplary embodiment of a computer fan control system .
fig. 1 is block diagram of an embodiment of a computer that includes a fan control system .
9. the computer system of claim 8, wherein said fan of said computer system operates at full speed when startup .
2. the fan control system of claim 1, wherein said fan of said computer system operates at full speed when startup .
a system of computer fan control reduces vibration values and prominence ratios of a number of computer fans. a control chip outputs a phase setting control instruction to a pwm chip. the pwm chip outputs a number of out - of - phase pwm signals to rotate the number of computer fans according to the phase setting control instruction .
the present invention relates to a fan control system and method for a computer system available at the different altitudes .
a fan control system for a computer system at the different altitudes is provided. the fan control system includes a current detector and a controller. the current sensing circuit detects a current of a fan at full speed. the controller outputs a control signal for controlling the fan within the computer system according to the fan current .
fan control on a 2 - fan macbook pro running os x 10. 7
11. the computer system of claim 8, wherein said control signal is a pwm signal .
4. the fan control system of claim 1, wherein said control signal is a pwm signal .
fan control is installed as a preference pane and, optionally, bitbar is installed in the applications folder. open the fan control preference pane (in system preferences) to adjust your fan control settings .
for the computer fans, what are some of its component values like it' s resistor, inductance, how many poles? what values would a standard speed control computer fan have? thanks .
chassis fan headers control in dc mode only - and that will control 4 pin fans but not in pwm mode .
12. the system of claim 10, wherein the control chip is a tl594 control chip .
17. the system of claim 15, wherein the control circuit comprises a tl594 control chip .
12. the system of claim 10, wherein the control chip is a tl594 control chip .
17. the system of claim 15, wherein the control circuit comprises a tl594 control chip .
control 5 sets of fan / temp, upto 25w per fan channel, usb3. 0 ports, turn fan off completely
a) asus' fan control software functions differently than bios control. on my build, asus' software reports a minimum fan speed of 21 %
5. the fan control system of claim 4, wherein said control stores a fan table, which comprises a duty cycle in pwm signal outputting to the fan at different ambient temperatures for a computer system operating normally at the specified highest altitude .
14. the computer system of claim 11, wherein said control stores a fan table, which comprises a duty cycle in pwm signal outputting to the fan at different ambient temperatures for a computer system operating normally at the specified highest altitude .
in yet another aspect, a fan control method for a computer system which comprises a fan for providing airflow to a target device is provided. the method detects a current of the fan at full speed, and generates a control signal for controlling the fan according to the current of the fan .
21. the computer of claim 20, wherein the control circuit is configured to compare the temperature feedback signal and the fan command signal to a ramp signal generated an oscillator of the control chip .
21. the computer of claim 20, wherein the control circuit is configured to compare the temperature feedback signal and the fan command signal to a ramp signal generated an oscillator of the control chip .
a pulse width modulation (pwm) chip connected to the plurality of computer fans and the control chip, outputting a plurality of out - of - phase pwm signals to rotate the plurality of computer fans according to the phase setting control instruction .
control means for receiving the temperature feedback signal and the fan command signal and for generating a pulse width modulation control signal for a fan that cools the computer component, the control means being configured to set a duty cycle of the pulse width modulation control signal relative whichever of the temperature feedback signal and the fan command signal that corresponds to a larger duty cycle .
when adjusting fan speeds, fan control asks the operating system to run the fan (s) at certain speed (s) .
tekit computer case cooler - 3. 5
pc front panel 4 channel aluminium brushed fan speed controller
23. the computer of claim 20, wherein the control system further comprises a scaling circuit that scales the temperature feedback signal .
23. the computer of claim 20, wherein the control system further comprises a scaling circuit that scales the temperature feedback signal .
computers are complex pieces of technology with many small components that need to run smoothly. computer fans are an essential part of any computer, as they help keep cool air flowing over your components. if your computer is overheating, or you need to replace an existing fan, installing a new fan can help lower temperatures and even make your computer quieter .
7. the system of claim 1, wherein the pulse width modulation control circuit comprises a tl594 control chip .
7. the system of claim 1, wherein the pulse width modulation control circuit comprises a tl594 control chip .
the control chip 20 stores a setup program to output a phase setting control instruction to the pwm chip 30 .
sets fan speed to a fixed value. users can reduce noise levels to near 0db with highly specific fan speed control. it reacts to system loads for greater control .
a controller for generating a control signal for controlling said fan according to said current .
open up the computer’s case, turn it on, and look around with a flashlight (but try not to touch anything while the computer is on) .
550w variable fan speed controller. one control switch for 3 settings: variable speed, off, high, med, low. built - in grounded control outlet. perfect to control speed for high velocity inline fan and ...
is there a program that allows me to control the speed of my toshiba laptops fan .
in one aspect, a fan control system and method is provided for a computer system to operate normally without a pressure sensor at the different altitudes so as to remove extra cost and achieve the effect of energy saving at the same time. another aspect provides a fan control system and method to reduce the noise by the fan when the computer system is used at lower altitudes .
13. the computer system of claim 12, further comprising a baseboard management controller (bmc), wherein said controller of said fan control system is integrated in said bmc .
a voltage detecting unit connected to the voltage regulation control unit for providing a reference voltage to the voltage regulation control unit .
in another aspect, a computer system is provided with a target device, a fan for providing airflow to the target device, and a fan control system for controlling the fan. the fan control system further comprises a current detector and a controller, in which the current detector is configured for detecting a current of the fan at full speed, and the controller generates a control signal for controlling the fan at least according to the current of the fan. the fan may be a fan controlled by a pwm (pulse - width modulation) signal .
fig. 1 shows a computer system according to an embodiment of the present invention .
18. the method of claim 17, wherein said fan of said computer system operates at full speed when startup .
6. the fan control system of claim 5, wherein said control stores a pressure rating adjusting table, which comprises a minimum multiplication rating for said duty cycle in pwm signal outputting to the fan so that said computer system operates normally at the altitude corresponding to said current .
ecgr 6143. power system control. (3) prerequisites: ecgr 4142 and 4111 or their equivalents. computer functions for automatic control of power systems. automatic generation control, regulation of frequency and tie - line power interchanges. automatic voltage regulation, excitation system model. power system dynamics. computer control centers. credit will not be given for ecgr 6143 where credit has been given for ecgr 8143. (on demand )
15. the computer system of claim 14, wherein said control stores a pressure rating adjusting table, which comprises a minimum multiplication rating for said duty cycle in pwm signal outputting to the fan so that said computer system operates normally at the altitude corresponding to said current .
not the answer you' re looking for? browse other questions tagged computer - building fan or ask your own question .
wherein the temperature feedback signal establishes a minimum fan speed and the fan command signal can override the temperature feedback signal to provide additional cooling to a computer system even though such additional cooling is not required by the computer component whose temperature is measured .
the fan - speed control is only done through varrying the voltage to the fan. you wont be able to directly control the speed in software, but can still do it with external inline fan speed reducers or front panels .
how you control your fans depends a lot on your computer, your fans, and how everything is put together, so let’s start with some basics .
a good set of fans can keep your computer from overheating, but they can also make your computer sound like a wind tunnel. here’s how to control your pc’s fans for superior cooling when it’s working hard, and silence when it isn’t .
12. the computer system of claim 11, wherein said target device is a cpu .
referring now to the figures, in which like numerals designate corresponding parts, fig. 1 provides a block diagram of a computer 100 that comprises a control system 102 that is used to control the speed of a fan 104 that is provided within the computer. the fan 104 is specifically provided to cool a particular component of the computer 100. by way of example, the component to be cooled comprises a power supply (not shown) of the computer 100. the fan 104 is a pwm controlled fan that comprises its own integrated circuit that controls the fan speed relative to a pwm input signal provided by the control system 102. by way of example, the fan 104 comprises a model 3110rl - 04w - s86 from the mineba matsushita motor company .
the' upper temp threshold' setting defines the temperature by which fan control will be requesting the maximum fan speed (s) .
figure 4. boost circuit for driving a 12 - v fan, using the output from the linear fan - control adm1028’s dac .
24. the computer of claim 20, wherein the control system further comprises a command signal circuit that converts the fan command signal from a pulse width modulation signal into a dc voltage signal .
24. the computer of claim 20, wherein the control system further comprises a command signal circuit that converts the fan command signal from a pulse width modulation signal into a dc voltage signal .
asus rampage iv black fan control via software options? fanxpert not registering all fans. picture inside .
fig. 2 is an exploded, isometric view of a computer fan of fig. 1, in accordance with an embodiment .
touch control 5 sets of fan / temp. up to 25w per fan channel, usb3. 0, audio / mic, lcd display
16. the computer system of claim 15, wherein said control obtains an actual duty cycle in pwm signal at said ambient temperature outputting to said fan by multiplying said duty cycle in pwm signal by said pressure rating adjusting factor corresponding to the altitude of the position where said computer system operates .
discharge any remaining power in your computer. hold the power button for at least ten seconds .
continue to ground yourself while working on the computer to release any charge that has built up .
understand how efficient air cooling works. the fans on your computer don' t just blow air on your components. this is not the most efficient way to cool your computer. instead, fans should move air through the computer, passing fresh air over your components. [ 1 ]
35. the system of claim 10, wherein the particular computer component is a power supply .
36. the system of claim 15, wherein the particular computer component is a power supply .
38. the system of claim 25, wherein the particular computer component is a power supply .
the fan8025pwm 80mm pwm case fan adds an efficient air cooling solution to computer cases or other enclosures, to keep components running optimally .
figure 3. a simple analog realization of a current controlled fan control. c1 smoothes the fan response and filters short - term current spikes .
in one embodiment, a control circuit is used to produce a pwm signal that is provided to the pwm controlled fan. the control circuit generates the pwm signal relative to multiple inputs that it receives from components within the computer in which the fan resides. more particularly, the control circuit receives a feedback signal from a temperature - sensing device associated with the component to be cooled, and a command signal from the computer system (e. g. , the system motherboard) .
for example, in my computer’s bios, i can only automatically control fans based on the cpu temperature. if you want to control your fans based on other values, like your hard drive temperatures, you’ll want to take a look at the next section in this article, “get more advanced control with speedfan” .
a fan voltage regulation control device includes a voltage regulation control unit for providing the power to a heat - dispersing fan, wherein the voltage regulation control unit is connected to a temperature detecting element and a voltage detecting unit. the temperature detecting element may influence the output power from the control unit to the fan, and through the voltage detecting unit, an input current to the fan can be maintained for providing overload and overheated protections .
referring to figs. 1 and 2, an exemplary embodiment of a system 6 for controlling a plurality of computer fans 10 is shown. the system 6 includes a control chip 20 and a pulse width modulation (pwm) chip 30. the pwm chip 30 is connected to the plurality of computer fans 10 and to the control chip 20. the control chip 20 may be a microcontroller or other kind of chip .
37. the system of claim 20, wherein the component is a power supply of the computer .
i used a site (i can' t find it now) that was about computer fan control using a 555, and i changed a few things to move it over to a simple 3v dc motor .
so yeah, it looks like to control cpu fan, you just have to change those settings to manual .
5. the control device as claimed in claim 3, wherein when the stable output voltage exceeds the loading of the fan, the voltage regulation control unit sends out a protection signal .
16. the system of claim 15, wherein the control means comprises a control circuit that is configured to generate the pulse width modulation signal by comparing each of the temperature feedback signal and the fan command signal with a ramp signal generated by the control circuit .
16. the system of claim 15, wherein the control means comprises a control circuit that is configured to generate the pulse width modulation signal by comparing each of the temperature feedback signal and the fan command signal with a ramp signal generated by the control circuit .
the fans in your computer can get power in one of two ways: from the motherboard, or directly from your computer’s power supply. if they’re connected to the power supply (usually through a molex connector), there’s no way to control them through software—you’d have to hook them up to a hardware fan controller .
fan control will automatically adjust the speed of the fan (s) in your mac, based upon the temperature of critical components within your system. the objective is to help extend the life of components within your mac while also helping to minimize the noise generated by your system' s fans. fan control has various settings which allow you to configure how fan control operates .
the present invention is related to a fan voltage regulation control device, and more particularly to a fan voltage regulation control device which adopts a voltage detecting unit for maintaining an input current constant and also providing overload and overheated protections .
cpu / case multi - fan speed controller front panel for 3. 5
pc drive bay w / 4 channel pc computer cooling controller temperature
the' lower temp threshold' setting defines the lowest temperature at which fan control may start requesting increased fan speed (s) to help reduce temperatures .
when noise is an issue and as long as the motherboard has control over the headers i setup every system i build like this, although i normally let the bios handle the fan control .
an article has been added to describe the long awaited new advanced fan control method. you can find it here .
fan control 1. 3. 0 — initial release of 1. 3 version (2016 - 11 - 29 )
so perhaps some makers of fans or pc software for fan control already did this - i don' t know .
fig. 1 shows a schematic view of structures of a fan speed control system, according to the present invention .
fig. 1a shows a schematic view of steps of a fan speed control system, according to the present invention .
fig. 2 is a block diagram of an example embodiment of the fan control system shown in fig. 1 .
11. the system of claim 10, wherein the control chip is configured to compare the temperature feedback signal and the fan command signal to a ramp signal generated an oscillator of the control chip .
5. 25 inch fan speed controller 12v 4 - channel fan speed controller drive bit cpu fan speed controller, 4 channel 30w temperature fan speed controller 5. 25
cpu cooler fan controller brushed alum
the open hardware monitor is a free open source software that monitors temperature sensors, fan speeds, voltages, load and clock speeds of a computer .
' fan speeds: max.' shows the maximum fan speed allowed for the fan, as reported by the operating system
figure 1a shows a fan control scheme based on temperature that requires a rise in temperature to act. the thermometer has to go up to turn the fan on and make it go faster. this is not a maximum cooling scenario. figure 1b shows a fan control scheme in which fan speed is controlled by sensing supply current. this makes fan control proportional to the thermal load, eliminating time lags and insuring the lowest possible system temperatures .
if you are using a laptop or other off - the - shelf computer (like a dell), chances are your computer automatically controls its fans to some extent already. if your computer is getting hotter than you’d like, or your fans are louder than you’d like, you should do a couple of other things first :
there are two main sizes for computer fans: 80 mm and 120 mm. your computer may support other sizes, including 60 mm or 140 mm. if you' re unsure, remove one of the fans that is currently installed and take it to your local computer retailer and ask about its size or measure it yourself .
6. the control device as claimed in claim 1, wherein the stable output voltage of the voltage regulation control unit is determined by the rotation speed parameter .
34. the system of claim 1, wherein the particular component is a power supply of the computer system .
a fan controller monitors temperature, fan speed, and can be used to manually change fan speed or program fan speed. without a fan controller, speed is automatically controlled by the motherboard, according to temperature .
this has brought about a wide choice of thermally based fan control ic’s. using temperature to control a fan in fact conflicts with the ideal of keeping systems as cool as possible. thermal fan control requires a temperature rise to enable the fan as depicted in figure 1a. proportional controllers make fan speed proportional to temperature, which is even more inappropriate, since it requires even higher temperatures to enable higher fan speeds. such control strategy is more appropriate in a system where it is desired to stabilize a system at an elevated temperature, rather than to cool it as much as possible .
a control chip that is configured to receive multiple dc voltage signals and output a pulse width modulation control signal to the fan, the chip having a plurality of pins including a feedback pin and a dead time control pin, the feedback pin receiving the temperature feedback signal output from the thermistor and the dead time control pin receiving a separate fan command signal output from a motherboard of a computer in which the component and fan are provided, the control chip further being configured to generate a pulse width modulation signal that is sent to the fan, the pulse width modulation signal being generated by comparing the temperature feedback signal and the fan command signal and setting the duty cycle of the pulse width modulation signal to correspond to the larger of the temperature feedback signal and the fan command signal .
with such control, the fan 104 is operated to at least adequately cool the component with which the fan is associated (e. g. , power supply) and, optionally, to run faster to increase the net airflow within the computer enclosure. the fan speed can be monitored during operation using a tachometer signal (tac) output from the fan 104 .
the fan 110 is preferably a fan using the duty cycle in pwm signal for control, such as the freezer® fan provided by arctic cooling corporation. however, in one embodiment, the fan 110 may also be an ordinary direct current (dc) fan. accordingly, the invention should not be limited to the structure of the fan .
from the “temperatures” tab, click on the plus sign next to a sensor to see all the fans it can control. check the fans you want it to control. in my case, i want “core 5” (my hottest cpu sensor) to control my cpu fan—so i’ll check that .
four - pin fan connections allow your computer to change the fan’s speed on - the - fly. usually, a system will lower speed to reduce noise and increase speed when more cooling is needed .
i' m using an asus board and it says in the manual that the cha _ fan supports q - fan 2 (a feature of asus boards to control the fans). if the cha _ fan is only 3 - pin (3rd pin being a rotation signal), how did it manage to control the fan speed ?
fig. 2 shows a temperature curve of a chip of the present invention using 6 pins to control operation of a fan .
fig. 5 shows a temperature curve of a chip of the present invention using 5 pins to control operation of a fan .
the best fan control software available today comes with the motherboard... and it works. which mobo do you have ?
that fan like others have said includes its own ic / hall sensors built into the fan. you can only vary the input voltage (from like 7v to 12v) to control its speed. your controller cannot control these. not to mention that the fans that are controllable use pwm inputs not an analog voltage input for speed control .
30. the system of claim 10, wherein the resistive thermistor is provided on or within the particular computer component .
4. the low - pin count fan speed control system according to claim 2, wherein the activation unit and the drive unit are further a linear control unit or a pwm (pulse width modulation) unit .
7. the low - pin count fan speed control method according to claim 5, wherein the activation unit and the drive unit are further a linear control unit or a pwm (pulse width modulation) unit .
11. the system of claim 10, wherein the pulse width modulation control circuit is configured to compare the temperature feedback signal and the fan command signal to a ramp signal generated an oscillator of the control chip .
if your fan has four wires, you don’t need to do what we will teach in this tutorial, as your fan already has a speed control circuit. just go to the motherboard setup and look for an option to enable this feature (“cpu smart fan control” and setting mode to “auto” in figure 4). this will reduce the cpu fan speed automatically when your computer is idle or when you are not using a “heavy” application such as a game .
4 - pin pwm header can automatically control the speed of your fans and pumps .
4. the control device as claimed in claim 3, wherein when the input power exceeds the power source, the voltage regulation control unit sends out a protection signal .
6. the system of claim 1, wherein the control chip is a microcontroller .
while the above methods are great for automatic fan control, they aren' t always available on every motherboard—and they' ll usually only control one or two fans in your rig. if you want control over everything, you can install an inexpensive fan controller like one of these from newegg. it fits in one of your computer' s drive bays, and gives you a number of knobs that let you manually control the speed of each of your fans. it won' t monitor temperatures for you, so you' ll have to keep an eye on them with something like realtemp or rainmeter —but it will give you full control over every fan in your machine .
5. the system of claim 1, wherein the pulse width modulation control circuit is configured to compare the temperature feedback signal and the fan command signal to a ramp signal generated by the pulse width modulation control circuit .
5. the system of claim 1, wherein the pulse width modulation control circuit is configured to compare the temperature feedback signal and the fan command signal to a ramp signal generated by the pulse width modulation control circuit .
but, provided everything works properly, you’re all done! speedfan has even more options (you can even create your own response curves with “advanced fan control” in the “fan control” tab), but this basic setup should be more than enough for most people. a little configuration is all it takes to keep your computer cool when it’s working hard, and quiet when it isn’t .
currently i have over 50pcs 2 wire fan which is 48v fan. how can i modify 2 pin wire fan to 4 pin wire fan? can external simple circuit be made ?
next, attach the fan to an unused fan header. the headers are keyed to ensure a proper connection. four - pin headers will work with 3 - pin fans, but you won’t have control over fan speeds .
monitor your computer' s temperature. it' s all well and good if your fans are spinning properly, but the end goal is to cool the computer' s components. download a temperature monitoring program (speedfan takes care of this as well). if your computer is still overheating, you may need to reconfigure your fan locations and directions, or consider more extreme cooling solutions. [ 2 ]
first of all, if the fan is connected to a motherboard, then the tach signal will inform the computer with the speed of the fan. that is the original reason of existing of the tach wire .
pwm control: the prevalent method currently used for controlling fan speed in pcs is low - frequency pwm control. in this approach, the voltage applied to the fan is always either zero or full - scale—avoiding the problems experienced in linear control at lower voltages. figure 5 shows a typical drive circuit used with pwm output from the adt7460 thermal voltage controller .
the original version of fan control was created by lobotomo in about 2008 and it' s still be best design of any of the fan - controlling software! this version of fan control updates and enhances the lobotomo work. this software was built using 10. 8 sdk and was tested on the following macs :
also notice that during this tutorial, our examples will use a cpu fan, but everything we say is valid for any kind of fan located inside the pc: video card fan, chipset fan, case fan, etc .
thinking on connecting just the pwm control cable of the 3rd fan to the 2nd fan, controlling those fans with one controller but still monitoring the fans independently. is this possible ?
scans each fan' s characteristics through the exclusive automatic fan speed detection, giving custom speed settings of each fan with a single click .
2. the system of claim 1, wherein each computer fan comprises four magnetism generating members, and each magnetism generating member comprises a supporting member and an induction coil wound around a part of the supporting member spaced from one another, wherein when current passes through the magnetism generating members, the magnetism generating members produce a magnetic field which repels a magnetic field in the fan to rotate the computer fan, and the magnetism generating members of the plurality of computer fans are not aligned with each other during rotation .
front - install a fan on the front of your computer that sucks air in (intake). you may want to install a second front fan in the hard drive bay (if the case supports it) .
20. the method of claim 17, wherein said control signal is a pwm signal .
alex, you need to connect the control wire to the positive through a 1k resistor .
from my research there are two ways to control fan speeds, one is to reduce the voltage using either a potentiometer, resistors, or rheostat. the second is to use pwm to control the frequency sent to the fans .
alright, now that we’ve organized all our sensors and fans and given them proper names, it’s time to set up automatic fan control .
fig. 4 shows a flow diagram of a fan speed control system with a 5 - pin chip, according to the present invention .
. can' t say much on the video card fan though, that' s odd. were you using speedfan to control it ?
if, however, you are not satisfied with the pwm control provided by your computer, you can remove the fourth pin (see how in figures 6 and 7) and execute the procedures described in this tutorial .
finally, if you want to have both failure alarm (or digital readout of speed) and you want also speed control on the fan, then you need 4 - wire fan .
33. the system of claim 25, wherein the temperature - sensing device is provided on or within the particular computer component .
whats the best software to control cpu fan speed? speedfan does not work for cpu fans, i think it has to be plugged into the mobo case fan plug to mess with it .
i want some suggestions on fan control software that reacts to different temperatures on its own. i know about speed fan and the software that came with the motherboard and neither of them work .
rear - the power supply on the back of your computer has one fan that pushes air out the back (exhaust). set up another fan or two on the rear of the case configured to exhaust air as well .
see attached docs for two ways to control a voltage to drive a high current device like a fan, with a low current dc voltage .
to further illustrate the benefit of fan control by current measurement, compare the graphs of figure 2. using the example of a computer cpu. the graph shows the power supply current and depicts cpu temperature behavior with a thermally controlled fan and a current controlled fan. the current controlled fan reacts immediately to the thermal load where the thermally controlled fan must wait until temperature rises. the current controlled fan will always run at full speed if full current is being drawn regardless of temperature, insuring the lowest possible operating temperature .
3. the control device as claimed in claim 1, wherein the voltage regulation control unit is connected between the input power source and the heat - dispersing fan with a first protecting switch and a second protecting switch respectively mounted at two ends thereof, and, the voltage regulation control unit sends out protection signals for opening the switches .
for about a week i have new hp z420 workstation. this otherwise beatiful computer is fitted with the pwm fans which are whatever but not quiet. of course, when you plug - off them the bios starts protest. furthermore when you disconnect the pwm fan built in psu the computer stops working at all .
figure 1. tachometer - output waveform in 3 - wire fans—ideal, and under pwm control .
efficient good acoustics, almost as good as linear. inexpensive external circuit wide speed - control range
fig. 3 is a functional block diagram of a control chip shown in fig. 2 .
so, i my friend is looking to buy some case fans, but cannot afford a fan controller. my question is: is there any software that he can use to control the fan speed from there instead of buying a fan controller ?
on / off control: the next simplest method of fan control is thermostatic, or on / off control. this method is also very easy to implement. the fan is switched on only when cooling is needed, and it is switched off for the remainder of the time. the user needs to set the conditions under which cooling is needed—typically when the temperature exceeds a preset threshold .
blue = montherboard controls fan speed. (disconnecting blue wire fan will start run on full speed )
you will need to remove the side panel of your computer opposite of the motherboard in order to access the inside. remove any screws securing the side panel to the rest of your computer' s case and pry it off. some cases have side panels that swing .
fig. 5 is a contrast histogram diagram showing a prominence ratio generated by the plurality of computer fans when receiving the in - phase pwm signals in comparison with a prominence ratio generated by the plurality of computer fans when receiving the out - of - phase pwm signals .
fig. 6 is a contrast histogram diagram showing a vibration value generated by the plurality of computer fans when receiving the in - phase pwm signals in comparison with a vibration value generated by the plurality of computer fans when receiving the out - of - phase pwm signals .
fig. 7 shows a temperature curve of another preferred embodiment of the present invention using a 4 - pin chip to control operation of a fan .
managed to get speedfan fan speed control working on my gigabyte ga - z68x - ud3p - b3 board for the 2 x 4 - pin fan headers i have. they are happy controlling my fans .
i have an old 2 wire case fan. can i replace it with a 3 wire fan if i cut the third wire going to the fan ?
@ shinrai: the board is an asus p5k - se. i have 1 cpu _ fan, 1 pwr _ fan and 1 cha _ fan .
the 3 - pin connector provides power to the fan, and optionally (if the fan supports it), monitoring of the speed of the fan .
fig. 2 shows a flow diagram for a fan control method of the present invention, which describes the present invention in connection with fig. 1 .
how about using a small rc servo motor to move some louvers in front of a normal fan? this would give you complete control over the airflow .
the disclosed fan control systems and methods can be better understood with reference to the following drawings. the components in the drawings are not necessarily to scale .
many motherboards have fan control built - in to the bios settings these days, though they don' t always give you as much control as something like speedfan does. but, if your computer isn' t supported by speedfan, this is a good plan b. open up your motherboard' s bios settings (usually by holding a key like delete when you boot your computer), and search for the fan settings. they' re called all sorts of different things (for example, asus has
q - fan control
, while gigabyte has
smart fan control
), but generally you should be able to find it under one of the bios menus. enable this feature, and tweak any settings it gives you to your liking. some machines may only let you set it to conservative or liberal mode, while others will let you individually set temperature thresholds like speedfan .
the following will further describe how the controller 116 can determine the actual duty cycle outputting to the fan 110 at the different altitudes and at the different temperatures, so that the computer system can still operate normally and achieve the effect of energy saving. first, a nominal state is defined. in the conventional technique, if a computer system to operate normally at any altitudes is required, the fan speed of the computer system operating normally will be generally designed for a highest altitude specified by a system specification, such as 7000 ft from the sea level or much higher. in this embodiment, the nominal state is the one having the minimum duty cycle in pwm signal outputting to the fan at different ambient temperatures for a computer system operating normally at the specified highest altitude. at this time, a fan table as table 1 may be created for a computer system by experiment at different ambient temperatures according to the preferred embodiment of the present invention. as shown in table 1, each row shows a minimum duty cycle in pwm signal outputting to the fan for the computer system operating normally at each ambient temperature .
to install a case fan, hold the fan in place with one hand. with the other hand, tighten secure the fan in place with four screws .
molex fan connectors are older and don’t offer any controls for the fan, but they’re easy to connect .
conversion of a mac mini to accept dc power is not new, and pairing the computer with a high quality external linear power supply is one of the best upgrades you can perform on this popular computer. so why choose the uptone mmk? because it includes the world' s first and only linear fan controller circuit for macintosh computers .
31. the system of claim 15, wherein the means for outputting a temperature feedback signal is provided on or within the particular computer component .
you can repeat this process with your other fans. in my case, my cpu fan is the only 4 - pin fan in my computer, and my motherboard doesn’t support voltage control for my 3 - pin fans. so i’m basically done. but i’m going to rename the other fans anyway, and remove sensors that aren’t attached to a fan—just so i can keep track of which ones are which .
as shown in fig. 3, as operating, the input power source 10 can be a dc power source, the voltage regulation control unit 30 can tolerate a voltage fluctuation of the dc power source so as to maintain a stable output voltage to the fan 40, the voltage detecting unit 60 is connected to the voltage regulation control unit 30 and the voltage output terminal thereof for detecting the output voltage, and the temperature detecting element 50 is connected to the voltage regulation control unit 30 for obtaining the environmental temperature coefficient and outputting thereof to the voltage regulation control unit 30 so as to control the rotation of the fan 40 .
i use stand - alone 3 - wired fans for ventilation of a room. how could i connect the third wire to control the speed of the fan ?
the present invention relates to low - pin count fan speed control and more particularly to a low - pin count fan speed control system and a method thereof, wherein fewest pins (4, 5 or 6 pins) are used on a chip to achieve same functions of an existing solution with 8 pins or more .
if the fan isn' t designed for pwm control, you can always make a simple low pass filter to turn the pwm into a pseudo analoge output .
are you quoting the bios capabilities or are you quoting fanxpert software capabilities? have you installed fanxpert (part of aisuite)? some notes about fan control .
ecgr 6184. computer system engineering. (3) topics include data formats, register transfer operations, computer organization, microprogram control and alu design. arithmetic algorithms, i / o organization and memory organization are also covered. specific emphasis is placed throughout on tradeoffs between hardware and software. credit will not be given for ecgr 6184 where credit has been given for ecgr 8184. (on demand )
got it? alright, with that, let’s talk about the different ways you can control those fans .
none of these solutions is absolutely perfect, but hopefully with a bit of tinkering you can get more control over how fast (and loud) your fans run. got any of your own tips for fan control in your machine? let us know in the comments .
control the fan speeds of your cpu / gpu and chassis fans based on varying temperature readings from your system. speedfan home page urltoken speedfan is freeware. speedfan monitors voltages, fan speeds, and temperatures. speedfan can dynamically adjust fan speeds based on changing computer temperatures. speedfan runs on windows 9x, me, nt, 2000, 2003, xp, vista, and 7. speedfan also has 64 - bit support .
basically i' m looking for any comparable fan to replace the existing sunon kde2406ptb3 dc24v 1. 4w fan .
fan control uses the highest of the shown cpu / gpu - related temperatures, represented by the vertical line on the graph, to compute the requested the fan speed (s) according to the user' s slider / preference settings. fan - speed requests are designed to keep each fan' s' wanted' fan speed within 25 rpm of the sloped line on the graph .
if your computer' s running a little loud for your tastes, it' s probably because your fans are running at full speed—even if they don' t need to be. here are a few ways to manage your fan' s speed so they' re keeping your computer cool when they' re necessary and silent when they' re not .
added support for fan control on ite 87xx chips and a mainboard specific configuration for the gigabyte ga 970a ud3 (both based on a patch from eric hokanson) .
gah... ive been trying to get speedfan to control my cpu fan for days... finally coming to the realization that it wont alter cpu fans
ah, most unfortunate but not unexpected. i was rather hoping that the 3 - pin headers could offer control for the 230mm fan i have on the way .
then do the mod and connect both modded as well as normal molex tot he double trow switch. then you can switch between the two voltages and use that as a speed control feature. why not just install a fan speed control? urltoken (many others at newegg )
ecgr 5411. control systems theory i. (3) prerequisite: ecgr 3111 or equivalent. transfer functions, block diagrams and signal flow graphs. feedback control system characteristics. the performance and stability of feedback systems using root locus and frequency response methods. time domain analysis of control systems. the design and compensation of control systems. credit will not be given for ecgr 5411 where credit has been given for ecgr 4111. (fall )
fan control is the management of the rotational speed of an electric fan . in computers , various types of computer fans are used to provide adequate cooling , and different fan control mechanisms balance their cooling capacities and noise they generate . 
fan control is the management of the rotational speed of an electric fan. in computers, various types of computer fans are used to provide adequate cooling, and different fan control mechanisms balance their cooling capacities and noise they generate.
fan control is the management of the rotational speed of an electric fan. in computers, various types of computer fans are used to provide adequate cooling, and different fan control mechanisms balance their cooling capacities and noise they generate.