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 ...

There are many annoying issues associated with desktop 3D printers, but perhaps none are trickier than keeping the machine at the proper temperature. Too cold, and printed parts can warp or fail to… ...

So, this cause the fan unable to move even if the temperature exceed the threshold temperature. Solution 1. Connect the GND of the battery to the GND of arduino – common GND. If you are using a 5V ...