The only difference is that the cpu fan will not have the smart fan option uses the 4th pin so your fan will go at full speed instead of being able to slow the fan down when full speed is not need. Better to drive the fan using an npn transistor with its base fed from the arduino via a suitable resistor. How to control a cpu fan using the arduino youtube. Fans and onboard fan headers are backwards compatible. Arduino uno is the heart of this project and a l293d driver ic is used to drive the dc fanmotor.
Depending on the fan you select the arduino could have an overloaded op pin. The fan i used in my actual project was a fan from adda corporation. Usb to 2 x 34pin pwm 5v usb sleeved dual fan power adapter cable. If the fan behaves according to the norm, you can drive its pwm pin with an arduino. Usb to 2 x 3 4 pin pwm 5v usb sleeved dual fan power adapter cable. Some make 4pin only controllable via pin 4 pwm signal. Why and how to control fan speed for cooling electronic. Jan 26, 2009 a 3 pin cpu fan will work in a 4 pin cpu fan.
Arduino fan speed controll using pulse width modulation. The connector has a tab that will leave the blue wire from your fan unconnected. Control a fan with your mobile phone arduino project hub. With a n channel mosfet and an arduino you can control the fan speed. Control pwm fans with an arduino arduino project hub. Connect arduino board to pc and upload the code into arduino board.
Connect fan vcc to pin 6 and g to ground of the test board. Reboot your pc and press the delete key to go into the bios setup. Icstation 12v 4 wire pwm pc case cpu fan thermostat speed controller with sensor. But any other source that meet the requierements ofthe fan wil do. I had 5 laying around and thought mine as well give it a shot. So i gather from your reply that its safe to use a 3pin fan as an temporary solution while i try to purchase a 4pin fan. The noise made it impossible to measure the fans rotation. Get the best deals on intel 4 pin cpu fans and find everything youll need to improve your home office setup at. I am seeing some fans such as the thermaltake v1 max, pn clp0401 that use 3pin power connectors, and other fans such as the vigor monsoon iii lt, pn cltm3lt have 4pin pwn power connectors. Connect v0 pin to the center pin of 10k potentiometer. In my application, the fan worked great to sense air flow. Controlling fan speed with mosfet and arduino youtube.
How to make a temperaturecontrolled fan using arduino. Solved replacing cpu cooler 4pin pwm fan to 3pin fan. Installation of 4 pin processor fan connector with 3 pin. Note that chassis and cpu fans may use either 3 pin or 4 pin power connectors. A question came up on irc regarding how to pwm a 3pin pc fan with an arduino using analogwrite. Page 1 of 2 wiring new 4 pin cpu fans to 12v dc posted in equipment. Make sure that 12volt eg gnd is connected to the arduino gnd. Page 1 of 2 wiring new 4pin cpu fans to 12v dc posted in equipment. Pin 2 of the optocoupler is connected with the arduinos ground. Dht22 sensor is used to sense the room temperature and then we adjust speed of a dc fanmotor accordingly using pwm pulse width modulation. It has 4 pins and i discovered the vcc, graund and signal i think, the other must be for rpm readings, so i connect vcc to 5v, the graund to gnd and the signal to pin 6. Not documented for the mh6, the cpu fans can be either voltage controlled or pwm controlled. One variant is the 3 pin fan, commonly called the dc powered fan. Ive been trying to control a 4 pin computer fan using the arduino.
Only problem is that it is 4 pin, but my power supply has a 2 pin fan connector. My hypertx2 heatsink only has a 3pin connector, so i set the bios to voltage. The fan header description is probably the same for other motherboard manuals, so look for this. Get the best deals on intel 4pin cpu fans and find everything youll need to improve your home office setup at. Some make 4 pin only controllable via pin 4 pwm signal. If it is 3 pin, it is voltage controlled, if 4 pwm. Jul 23, 2019 a 330ohm resistor is connected with pin number1 of the optocoupler and the other end of the resistor is connected with pin number 5 of the arduino or mega. I was using a 4 pin cpu fan red, black, yellow, and blue. Read out and control a 4 pin cpu fan today i tried to read out the cpu speed information of a 4 wire cpu fan intel dtc aal03 and additionaly i tried to control the fan speed by pwm.
Temperature controlled fan using arduino hobby project. Arduino fan speed controll using pulse width modulation pwm with code himanshu gajjar march 25, 2018 controlling speed of 4 pin cpu fan using arduino and pwm. The mobo bios has a setting for either pwm or voltage to control the fans. Arduino read out and control a 4pin cpu fan free download as pdf file.
Apparently, fan control over a 3 pin is possible, by varying the voltage supplied. The world of casecpu fans is new to me, and i want to make sure i understand what ive read about 3pin and 4pin fans. Controlling speed of 4 pin cpu fan using arduino and pwmin this project i have controlled speed of 4 pin cpu fan using arduino pwm. Chassis and cpu fans may use either 3pin or 4pin power connectors. Arduino unor3 external powersource 12volt dc 1,5 amp potentiometer 1 kohm. The project is fairly easy to build and the schematic view is uploaded here. In this video, we show how you can connect a cpu fan to the arduino to control it by allowing a user to enter the speed they want the fan to spin at. The following requirements are measured at the pwm control pin of the fan cable connector. Arduino read out and control a 4pin cpu fan hertz frequency. The fan i used in my actual project was a fan from adda. Read out and control a 4pin cpu fan today i tried to read out the cpu speed information of a 4wire cpu fan intel dtc aal03 and additionaly i tried to control the fan speed by pwm.
Default the default analog reference of 5 volts on 5v arduino boards internal builtin reference voltage 1. Im in the process of upgrading to an ultra120 extreme, which requires the purchase of the fan separately. The arduino uno diagram shows that arduino pin is pb5 which means that the port is b so you should use the value ddrb for that pin. The 64bit intel xeon processor with 800 mhz system bus and 2 mb of l2 cache is shipping with a new heatsink fan, which has a 4 pin connector. I have been wondering about this project and how to control my 4 pin pwm fans.
The z400 performance heatsinkfan is hp part 463981001, and its fan is a delta afb0912hh, with standard 4 wire pwm inout of the motor. It really depends on many factors, but its noice level is low even at 1600 rpm, and 64. Should i add a resistor or a diode or both onto the pwm wire for protection. If i put the wires in wire connectors, and insert them into a 4 pin head, can it function in the 4 pin fan slot on the motherboard. To power the fan you need an external powersource, in this case i used a 12 volt 1,5amp dc adapter. Cpu fan with 4 pin header arduino nano 2 push button 4 pin cpu fan 12v adapter jumper wires. Hi, today i took the cpu fan from an older computer and connect it to my arduino to control it.
If memory serves only about 100ma is recommended could be even less. Plug the small 4 pin connector to the cpu fan 3 pin on your motherboard. Pwm10d riitop 4 pin pwm fan controller hub 1 to 10 ports with selfsticker for cpu. Understanding 3pin and 4pin casecpu fans hardforum. Fritzing project connect, control and read an 4 wire fan. Hello my dear friends, in this video im going to show you 4 awesome life hacks for cpu fan subscribe for new interesting videos. Hello, ive been trying to control a 4pin computer fan using the arduino. Arduino pwm controlling a 4 wires pc fan with slider. Cpu fan header 3 4 pin hi is there any way around the fact that if i connect a 3 pin fan to the cpu fan header and aux cpu fan header the fan runs at full speed and no software or bios settings can alter its state. You can plug a 3 pin cpu fan into a 4 pin socket on the motherboard with no problem. Arduino pin is pb5 so you should use the value portb for.
I have two new 4pin cpu fans that i am using to replace the existing fans in my dob. Nov 25, 2018 hello my dear friends, in this video im going to show you 4 awesome life hacks for cpu fan subscribe for new interesting videos. There is a micro switch on the cpu fan header that detects whether you have a 3 pin or 4 pin fan plugged in. The pwm pin accepts 5v input, and sources no more than 5ma, so it should be fine. Arduino fan speed controll using pulse width modulation pwm. Zalman fanmate 1 rheostat and 4pin pwm fan tweak at one point or another we have all thought about how noisy our computers are. One variant is the 3pin fan, commonly called the dc powered fan. This project shows how to connect, controland read an 4 wire computerfan. A 4wire fan has power, ground, a tach output, and a pwmdrive input. Pwm library on the arduino to the red and black wires on the 3wire fan. Arduino ir remote based fan speed controlling, library. In this project, i will show how to build a circuit with arduino uno that read the temperature via a sensor and control the speed of a 4pin pwm fan. A 4wire cpu motherboard fan is a standard brushless dc bldc fan, but has four wires extending from the casing. This way you dont need the transistors to control the fans.
Chassis and cpu fans may use either 3 pin or 4 pin power connectors. The plan is to run thru a voltage controllable adaptor that allows variable input from 5v to 12v via a small adjustment screw. Opensource electronic prototyping platform enabling users to create interactive electronic objects. Riitop 4 pin pwm fan controller hub 1 to 10 ports with selfsticker for cpu cooler, case chasis cooling fan power cable hub splitter adapter, power by ide molex 4pin. These fans take a pwm signal on their 4th pin to control the speed of. Pwm fast pwm mode generates one 500ns pulse even when duty cycle is 0. The norm says you have to use 25 khz pwm frequency though, which is a bit tricky. A 330ohm resistor is connected with pin number1 of the optocoupler and the other end of the resistor is connected with pin number 5 of the arduino or mega. The system works by an application running on the pc checking the cpu temperature and checking whether to speed up or slow down the fans. Installation of 4 pin processor fan connector with 3 pin fan. Wiring new 4pin cpu fans to 12v dc equipment cloudy nights. Id appreciate it if anyone can confirmcorrect the following. Connect battery to dc fan and bring common ground to arduino board as shown in image. Sold by noctua cooling solutions and ships from amazon fulfillment.
The problem was that the hall effect sensor, or tach signal, was incredibly noisy. Connect other two pins of potentiometer to the 5v and the ground. Although some motherboard have features which allow the system to dynamically speed up or slow down cpu fans, most systems leave case fans running at default voltages, and noise levels. Here we are going to make a temperature controlled dc fan. I am not sure how many uses there are for using a pc fan as a sensor, but if you need to detect or measure air flow, this is a great way to do it. Jan 23, 2016 depending on the fan you select the arduino could have an overloaded op pin.
The 5th hole in the plug would be empty if it was a mainstream heatsinkfan, and is occupied with a ground jumper from hole 1 to 5 if it is a performance heatsinkfan. Connect the battery clip to the battery after uploading following sketch. There are two general varieties of pc fan connectors, which ultimately determine the type of control you have over fan speeds and whatnot. A 4 wire cpu motherboard fan is a standard brushless dc bldc fan, but has four wires extending from the casing. Sold by feng caihua and ships from amazon fulfillment. You can plug a 3pin cpu fan into a 4pin socket on the motherboard with no problem. Apparently, fan control over a 3pin is possible, by varying the voltage supplied.
My hypertx2 heatsink only has a 3 pin connector, so i set the bios to voltage. Processor heatsink fans are included only on the active boxed processor skus. Zalman fanmate 1 rheostat and 4pin pwm fan tweak on. These fans take a pwm signal on their 4th pin to control the speed of the fan, from the specs of the fan it says it requiresexpects. I have two new 4 pin cpu fans that i am using to replace the existing fans in my dob.