Photoshop CC 2017 tutorial showing how to create the look of a huge display sign of retro, LED lights of text and graphics ...

Digital signage is essential for any bricks and mortar store, but they an be expensive to buy. Why not hack your own together with a Raspberry Pi?

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.