Automatic fan speed adjustment from temperature

Fan rotation speed regulator: types of device and connection rules

The fan is one of the inconspicuous, but extremely important devices that help create favorable conditions for work, relaxation and just a pleasant time of time.

Computers, refrigerators, air conditioners and other equipment will not be able to function without it. For the most efficient operation of various devices, a fan rotation speed regulator is used.

From our material you will learn about what regulators are, the features of their work. We will also tell you how to assemble a device with our own hands and what you need for this.

We proceed to the assembly:

One. We fall out the capacitor and cut the earthen path, in its gap we will plow transistor 2. We solder the transistor according to this scheme: 1) Stock. To the minus contact at the site of the capacitor. 2) the source. To the minus of the Molex connector (any of the two average contacts) 3) the shutter through the resistor to contact with the PWM signal, this is 4 contact of the cooler connector. I soldered a 330 Ohm resistor, in different schemes I saw from 100 Ohms to 10 kOhm. 3. Further nuance. If the processor cooler you have 4 PIN you need to cut the minus going to the red connector and throw it bypassing the transistor, if 3 PIN, you need to do nothing. 4. We solder the diodes with a cathode to the plus, and the anode to minus. Perhaps you can get by with one powerful diode in such an assembly, I hope in the Комментарии и мнения владельцев all here and that’s it, now we connect the branch to the power supply molecuier and a complete wire to the 4 PIN processing processor on the motherboard. The processor cooler is connected to the red branch connector. We connect our 3-Pin coolers to the rest of the connectors, you can also 2-Pin, since they are also perfectly adjustable according to this scheme.

I have all the coolers start normally, the turns are adjusted depending on the temperature of the processor. They work in a simple one at minimum speeds, and with a load in full power. If you don’t start some kind of cooler, then add to the circuit, after a transistor, the condenser microfarade per 100.

Setting up automatic control of the cooler of laptop

To include automatic control, sliders must be moved to the right to the stop, the value of “Auto” will appear. Now Notebook Fan Control will change the speed of rotation depending on the temperature, and this behavior can be configured: click on the “” button (where the laptop model was chosen) and then “Edit”.

On the Basic Configuration tab, the “Critical Temperature” parameter is changed. A critical temperature at which the maximum cooler speed (100%) will automatically turn on.

This number is pulled automatically for the selected laptop model, but I recommend not to leave a value above 85 degrees, the laptop will last longer!

We go to the Fan Configuration tab, click on the only line in the table and click “Edit”:

Next, go to the Temperature Thresholds tab (temperature thresholds).

A comfortable window with sliders appears using a double click on a line. Then everything is simple, for each range of the laptop processor, the rotation speed is set:

automatic, speed, adjustment, temperature

For example, I have indicated that at a temperature of 35 to 50 degrees, the speed of 30 will be applied.3% to cool the processor. After making changes, click “OK. Save. Apply. Enabled “

Do not touch other parameters in the program, t.To. This can lead to hanging the system, if you do not know what you are doing!

Automatic launch of the program

In the main window of the NBFC program, click on the gear icon in the lower right corner:

  • “Start with Windows”. The program will load with Windows
  • “Close to try”. If you turn or close the program, it will fall into a system tray (next to the watch) and will show the current speed of the cooler, while it will not take a place on the task panel
  • “Tray icon color”. The color of the icon value
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Watch the video for working with the program:

Open Hardware Monitor

The Open Hardware Monitor program was originally created to monitor the operation of all important components of the computer, including the rotation speed of both the main and additional coolers. But this utility also has a function that allows you to manually control the fans.

The Controls velocity adjustment function is in that section of the main window that shows the monitoring data behind a specific device. T.E. If this is a fan of the central processor, then the option of controlling its speed will be located in the section with the name of the CPU model, if the video card is in the section with the name of the video adapter. If in a particular section the “Controls” function is absent, this means that the device does not have cooler control or the program itself does not support the specific model of the motherboard, video card, etc.D.

automatic, speed, adjustment, temperature

To control fans from the Open Hardware Monitor:

  • Find the line “Controls” in the section with the name of the device.
  • If, for example, this is a video card, click on the GPU FAN option with the right mouse button, open the “Control” submenu, then “Manual” and already select the desired rotation speed as a percentage.

Connecting the controller to the hood

Installation of the device is carried out indoors. It is carried out taking into account the recirculation of air masses to cool internal circuits.

It is forbidden to place a regulator in a zone with poor air convection, direct sunlight, above the heating device. The working position of the device is strictly vertical, so the heat released will be dissipated

To correctly install the regulator, you must carefully read the instructions for the device.

Most models are designed for independent installation by the user and do not require special knowledge.

Contacts on branded products are marked, and recommendations for the connection, operation, and maintenance of the device are included in the delivery kit. Different devices are different in different devices

Installation of wall and intra.Sters are carried out by screws and dowels, which are selected in accordance with the dimensions and weight of the apparatus. Fasteners are usually delivered in the kit, as well as the connection control circuit of the fan controller.

The general pattern and sequence of actions is as follows:

  • The regulator is first mounted, then connected to the cable, which supplies current to the fan.
  • The wires are divided into “phase”, “zero”, “land” and cut, connected to the input and output terminals. It is important not to confuse them and make all the connections according to the instructions.
  • The last stage is to check the section of the cross.Section of the supply cable and the connection for compliance with the maximum permitted voltage of the device.

The process of installing wall regulators is similar to the principle of connecting sockets, lighting switches. You can use the old landing site of the fan switch to install the controller. In this case, the switch needs to be dismantled.

When the control module and the regulator itself are located in different cases, the installation of devices is complicated. The control unit is powered by an electrical panel, and the executive module is connected by means of a low.Current wire

If the controller with thermal contacts, it is recommended to connect it to engines with the received contacts of thermal protection connected to the terminals of the regulator TC. This scheme will reliably protect the main device.

Когда термоконтакты размыкаются в случае перегрева, цепь контроллера разрывается, двигатель сразу останавливается и зажигается аварийная лампочка.

automatic, speed, adjustment, temperature

The engine without thermal contacts requires the installation of separate thermal protection. Additionally, you can add a jumper to the TC, but the rated current of the regulator should be more than the maximum engine current by 20%.

Radiator cooling fan controller (from what was at hand).

My DC/DC shawl was littered with a PWM (latitudinal bulk modulator) on the 555 Timer, the idea of ​​using the same shim to control the engine cooling system. What it gives?One.Smooth inclusion of a fan without drawdowns of on.Board voltage (achieved due to a smooth change in voltage on the sensor) and as a result of the extension of the life of the fan itself.2.Dependence of the fan speed on engine temperature.3.A more stable temperature range of the engine (lasts around 85 degrees)

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We take the control signal from the temperature sensor of the dashboard, and for reliability we put this system in the parallel of the standard (True, at the same time, the standard system needs to be changed-the standard fan is switched by “”, but we need to control the fan “-“)

As a result of fitting for our requirements, we get a regulator diagram on 555 timer operating in the FIM mode (phase pulse modulation) and transistors of the Mosfet ( Mosfet-key is shown in this scheme simplified, on large currents it will be very hot):

I do not recommend it as the final option! The scheme is suitable only as an illustration of the principle of action. During the operation, refinements were required that are described later on the text (see. 01.2019 We bring weaknesses).

To reduce heating, it is necessary to use several mosfts repeating the R3-VT1 chain in the parallel, the number of transistors depends on the fan power of 200W-two transistors, 300W-three transistors, with high capacities it will be possible to strengthen the output 555 timer:

An important point:For uniform distribution of the load current on mosfta, we use the cross.Section wires 1. 1.5 kV.Mm of the same length connecting the power outputs.Since when operating the fan in the circuit (Aculator-Rover-Rostigulator Corpus “Earth”), a significant current (30a) is used in this circuit of the wire with a cross section of at least 6 kV.Mm, and to ensure security, put in this chain 40A fuse.We collect everything in the case from the ignition of the 402 engine of the engine and place the engine compartment on the left wing (good fasteners for installation is standard there).

Setting: We warm up the engine up to 85 degrees and rotate the resistor of the resistor R7, we achieve the fan to turn it on half its power. The device operation algorithm is such that when the engine temperature rises, the fan speed increases, when the temperature decreases, the fan speed decreases. In the future, it is necessary to adjust the tuning so that at 80-82 degrees the fan does not turn on.

Py.SY. The practice of use showed that the operation of the device is far from perfect and its effectiveness depends on the condition of the radiator (if the heat transfer of the radiator “like the new” is quite capable of “knocking down temperatures” and the standard fan system will be extremely rare even in 30 degree heat, Well, if the radiator “tired” then, except for the smooth acceleration of the fan, this scheme will not give anything more), so I recommend using this “craft” only in the parallel of the standard fan switching system.05.2015 Glucza Operation time was oxidized by contacts of the “minus” connection wires to the on.Board network. The ears of the switch body, the keys froze in open state and of course the fan spun on Max.Revolutions “for constant”. Contact cleaning and establishing a reliable “mass” returned the device to normal operating modes, but not for long. The cause of the malfunction was one of the mosfts, the culprit determined the color of his stock-source of contacts by the color of the color.

We continue to develop the topic further:

01.2019 We bring weaknessesAs it turned out, there are enough weaknesses in the scheme, let’s try to fix them:

1X3L Fan Speed Temperature Controller

#Management of MosftaEven the most advanced version of the 555 Timer chip LMC555 is a “slow” for controlling the transistors of the Mosfet. How it manifests itself?. Transistors work “not in full force” from which they tend to heat up and lose their resource sometimes reaching the breakdown

#Improving the reaction of the device to temperature changeIn the initial performance, the fan revolutions increase with less intensity than we would like.

Now the fan revolutions will increase and fall with a greater intensity.For the concept of the principle of action: the closer the 5th foot of the timer to the “earth”, the lower the turnover of the fan. The comparator is assembled on the A733 transistor, as soon as the voltage on the sensor becomes below the support (3.6V) The transistor begins to open thereby closing the transistor on the 5th leg of the timer, the fan begins to rotate. The threshold of the operation is selected by the value of the support voltage. With support voltage 3.6V the temperature of the coolant is held within 80-85C.

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To be able to adjust the support voltage (in order to set a different threshold of the fan operation in summer and winter), we use TL431 as source. The resistor selects the maximum limit of the support voltage. The maximum support voltage must be less than 5 volts, otherwise there is a high probability of burning the comparator transistor.

Further photos of the board in different stages of readiness, purely for the clarity of the components installation

Fan speed controller

I decided to buy a control regulator for fans in a system unit. Previously used a homemade from the Molex connector wires and simply switched the fans to a lower voltage.

Made of wires from the Molex connector, paper clips, heat shrinks and heat.Miles.

Food scheme

At work.

automatic, speed, adjustment, temperature

The device came in a tightly packaged package. 4 screws were supplied with the revolutionar.

The device is quite compact and designed for installation in 3.5 “compartment. Dimensions (SKHV): 10cm x 9.5 cm. Twilles of the regulators are 1 cm.

The device feeds from Molex connector. Fans are connected via 4 PIN connector.

In order to get into the device, unscrew 4 screws on the bottom

Sovedidiodes are very bright. Cloged them with a dense ribbon.

How automatic fan controller works | automatic fan controller circuit with temperature sensor

I am satisfied with the device. In general, high.Quality box. Materials / Assembly / soldering good quality. The only thing that did not quite suit is plastic. The walls are thin and places for attaching the screws because of this may become unusable.

Computer Fan control unit

In the proposed block, the regulation of the voltage supplying engines is carried out by the pulse method! As switching elements, field transistors with very low (ohm fraction) canal resistance were used in open state. They do not limit the starting current practically do not reduce the supply voltage to the full power of the fan.

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Reoobas STW-6041 was purchased because the Maternal payment Colorful Battle Axe c.X370M-G had only one connector for connecting the processor fan, there were no others. And I have two fans in front and back of the case, as well as one more. It was possible to make a simple reobas through a linear regulator of LM317 or a shim-regulator on a he555 timer with a minimum bandage, but then the whole highlight in the form of a stylish case and a visual display is lost. The standard Reobas also did not like it, since the sticking twins do not look very. I agree here, in this situation “checkers” are important to me, and not riding.

After the installation, the following picture turned out:

Two fans (1 and 3) and two heaters were connected. The second fan is not connected, the fourth is disabled (the regulator to the left to the stop). The revolutions are regulated widely, but less than 600 rpm of/min, the fan does not behave very stable, the shim control (duration of the pulses) would be very useful here. But on the other hand, with such minimum turns, the fan is simply useless.

I will say right, I like. The Zalman Z12 case has a double.Filled USB 3 block.0 connectors (from above), as well as audio outputs and two USB 2.0 in front, therefore, more “sophisticated” reobasy to me. I do not stutter about cartriders, I have never used it anywhere else.

Well, the patient is a question for many, why in China. With the coupon, he left 13, which is equivalent to 800. There is simply no something like that in offline, but similar starts from 3000 (not Moscow).

The budget version of the combined Reobas (with USB 3.0, audio defects and cartrider):

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