This is an easy tutorial showing how you can control the brightness of an LED or adjust the speed of a DC fan using Arduino Board, a small BC547 transistor and a potentiometer. In my example the whole ...

It takes two (or three, or one) MCU pins and needs an internal digital feedback loop, with the MCU putting out different pwm ratios into the RC network until the MCU measures the desired voltage at ...

When the microphone equipped Arduino detects enough noise, it will start a timer that keeps the fan running for two hours. If the tool keeps running, then more time gets added to the clock.

10: Arduino Fan Speed Controller 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 ...

A temperature/humidity sensor continuously monitors the heat situation inside the case – when things get too toasty, a 12V fan powers up to draw fresh air over the logic board and expansion cards.

Maker and 3D printing expert James Bruton based in the United Kingdom has created a new Arduino project in the form of a unique type of craft thanks to its electric ducted fan (EDF) propulsion system.