I made this project because I wanted a way to automatically control the speed of a DC fan according to the temperature read by a LM35 sensor. I had a few problems with the PWM part mainly because the ...

How to build a proportional controller that starts a cooling fan when circuit temperature passes a threshold, speeds up the fan as the temperature rises, and slows down and stops the fan when the ...

A good way to reduce acoustic noise in a system is to adjust the cooling-fan speed as a function of temperature. The standard way to do that (shown in simplified form in Figure 1) includes an IC that ...