The transistor serves as a current sink, and its base is connected to Arduino pin 3 (D3) to apply pulse width modulation control. The wiring diagram and sketch for a simple experiment is shown below. ...

Olympia, WA, April 29, 2013– Olympia Circuits introduces the Arno Shield to expand their line of products for new Arduino users. The Arno Shield contains all the components necessary to learn ...

I had a few problems with the PWM part mainly because the fan made a disturbing noise so I had to add a simple RC filter at the output of the PWM pin on the Arduino board. I used an LCD shield to ...