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.

I cannot get over how easy it is to get code running on an Arduino, allowing me to write the code to try to connect to a 20 character x 4 line LCD (wearing an I2C-to-parallel ‘backpack).

Luckily, Arduino’s own cloud services make it surprisingly easy to code for the Oplà. I opened the box, plugged the board into the Carrier, and then connected the board to my computer.