Multiplexing a 3x3 led array with an Arduino
Multiplexing LEDs explained
Multiplexing and charlieplexing can be quite a confusing task, and requires the use of transistors to switch the negative channels. I made this sketch to help people understand this concept and how to address each led. Also I am using this type of setup for my new 8x8 dual color led array display :D Hoping to have that created in Fritzing soon so I can share it with everyone.
I will have the code uploaded for this project as well very soon.