Arduino Pwm Fan Control

I had 5 laying around and thought mine as well give it a shot. It then becomes a matter of telling the fan pwm to raise or lower the speed based on the temperature. Controlling the fan was seemingly straightforward.

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Control pwm fans with an arduino some basic c programming and a lot of fun.

Arduino pwm fan control.

Many projects that use a temp sensor but never the most simple thing. The problem was that the hall effect sensor or tach signal was incredibly noisy. However i am looking at controlling the fan speed with the arduino via the pwm pins. The blue led seen on the prototype board is just for verifying correct circuit operation and also can be removed.

Control the speed of the fan. The noise made it impossible to measure the fan s rotation. Getting temperature values from a digital or analog temperature sensor on an arduino is fairly simple. 4 wired fan control pwm control a pwm fan with arduino.

The frequency values can be adjusted between 125 hz 8 mhz as well as a variable duty cycle. In this post we have described how to design temperature based fan speed control monitoring with arduino and lm35 temperature sensor. I simply want to control a 4 wired fan or maybe several with an arduino board. I have been wondering about this project and how to control my 4 pin pwm fans.

The arduino throttles the fans using pid logic and drives them through pwm. Beginner full instructions provided 24 154. The temperature and fan speed are reported through a 8 digit 7 segment display fitted on a rack mounted aluminium bar. The system uses a temperature sensor to control four fans that are driven by an arduino controller.

I o pin 9 on the arduino board is directly connected to fan control input and by reading the state of 3 push buttons on pins 2 3 4 different pwm values are sent to the fan. The circuit utilizes the mode 10 pwm phase correct on timer 1 ocr1a pin 9 and icr1 pin 10. I found the following diagram that seems to be what i am looking for in order to hook the fan up to the arduino. A question came up on irc regarding how to pwm a 3 pin pc fan with an arduino using analogwrite.

The microcontroller controls the speed of an electric fan according to the requirement allows dynamic and faster control and the lcd makes the system user friendly. The ultimate project is to control the fan based on temperature. I am looking at getting 2 80x10mm pwm fans. Temperature based fan speed control monitoring with arduino.

There is some information out there.

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