I'm hoping someone can help me with a bit of charlieplexing...
I want to setup a circuit that has 6 LED's and 2 x 7-segment displays. I am running a Leonardo, with a POT, 4 switches and stepper motor already, and with the LED's and display all connected I'm afraid I just don't have enough pins. I definitely understand the theory behind charlieplexing, and don't have any problem with the layout given all separate LED's...however I'm getting confused when trying to think of this problem with common anode 7-seg displays.
How would one go about charlieplexing with 6 LED's and 2 7 seg displays using only 5 pins (20 diodes total)? I will not need the decimal point.
I used this site to learn a bit...http://www.instructables.com/id/Controlling-20-Leds-from-5-Arduino-pins-using-Cha/step2/Charlieplexing-The-theory/
and these are the 7-segment displays I'm considering ordering...https://www.sparkfun.com/products/8546
Any help, direction or guidance would be greatly appreciated!