However, Charlieplexing is a bit more complicated in that it goes deeper than multiplexing. After some time, the whole digit or row is turned off and the next digit/row is turned on, etc… Simple! In multiplexing, an entire digit or row of LEDs are shown at one time. However, at the cost of time and/or brightness. Both are techniques used to not only reduce the number of microcontroller pins needed, but also to reduce the power requirements substantially. But after trial and error and blood, sweat, and tears, I can say that I have a better understanding of multiplexing and how best to implement it on an Arduino.įirst off, what is multiplexing? What about Charlieplexing? Any differences?Īctually, they are they same… Charlieplexing just takes multiplexing to a higher level. #Serial 7 segment display arduino how to#This project is well suited for displaying numerical information or if you want to control a bunch of LEDs. For beginners, like me, I had no clue on how to tackle this project. In this instructable, I will be teaching the basics of multiplexing 7 segment displays using an Arduino and a couple of shift registers.
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