It’s easy to control many LEDs with one Arduino board. However, you can also use the Charlieplexing method in the Arduino environment to control multiple LEDs one at a time without external display driver ICs. This is a great way to reduce part count (and expenses) in a project involving numeric or character displays.
In this chapter, you’ll learn to:
Use Charlieplexing with an Arduino Uno or compatible board or an ATtiny85 microcontroller
Use Charlieplexing with 6 and 12 LEDs
Simplify planning Charlieplexed circuits with the help of logic tables
You’ll also build a 30-LED matrix display for alphanumeric ...
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