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 ...

Problem Statement The LM35 temperature sensor provides a low-level output (~10 mV/°C). The Arduino ADC operates over a much higher voltage range: from 3 V to 5 V. Such a small sensor voltage results ...