Arduino Pwm Fan Control

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.

Arduino pwm fan control.

The problem was that the hall effect sensor or tach signal was incredibly noisy. The system uses a temperature sensor to control four fans that are driven by an arduino controller. The circuit utilizes the mode 10 pwm phase correct on timer 1 ocr1a pin 9 and icr1 pin 10. I had 5 laying around and thought mine as well give it a shot.

The arduino throttles the fans using pid logic and drives them through pwm. A question came up on irc regarding how to pwm a 3 pin pc fan with an arduino using analogwrite. It then becomes a matter of telling the fan pwm to raise or lower the speed based on the temperature. Many projects that use a temp sensor but never the most simple thing.

The ultimate project is to control the fan based on temperature. Getting temperature values from a digital or analog temperature sensor on an arduino is fairly simple. Control the speed of the fan. In this post we have described how to design temperature based fan speed control monitoring with arduino and lm35 temperature sensor.

I found the following diagram that seems to be what i am looking for in order to hook the fan up to the arduino. Controlling the fan was seemingly straightforward. The noise made it impossible to measure the fan s rotation. The temperature and fan speed are reported through a 8 digit 7 segment display fitted on a rack mounted aluminium bar.

I have been wondering about this project and how to control my 4 pin pwm fans. However i am looking at controlling the fan speed with the arduino via the pwm pins. I am looking at getting 2 80x10mm pwm fans. 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.

I simply want to control a 4 wired fan or maybe several with an arduino board. Beginner full instructions provided 24 154. There is some information out there. The frequency values can be adjusted between 125 hz 8 mhz as well as a variable duty cycle.

Temperature based fan speed control monitoring with arduino.