So, I’m starting to play with some parts I got with the Sparkfun Beginner Parts Kit (http://www.sparkfun.com/products/10003), including a 7-segment LED.
I have the 7-seg breadboarded and working fine, but I noticed that if you include the decimal point LED, it’s actually 8 LEDs. I was planning to drive this using the Extender module connected to the breadboard, but the Extender only has 7 I/O pins, so if I want to control all 8 segments, I’d obviously need to come up with some way of switching 2 LEDs on one pin. I’ve read some of the threads on LED cubes, and I confess that I’m basically lost when it comes to the idea of multiplexing.
Can anyone point me to a good resource or tutorial for figuring out multiplexing (assuming that’s the right solution for this particular issue)? I’m confident that I can easily drive the 7 segments with the Extender, but ideally I’d love to be able to fully drive this with my Spider (or Hydra) board, including the DP LED.