In this exercise, we will control a fan’s speed using a potentiometer. For this lab exercise you will need:1 Arduino Micro-controller1 Breadboard 1 Transistor PN22221 Diode1 220 Ohm ResistorJumper Wire Pack Connect the Fan At this point you should have all of the required materials for the exerc…By: CodyBuch // Read more: original article.
