Hey guys, this is my first post ever.
I acquired some neat rotary thumbwheel switches, made by the digitran company. I want to use them to make a lock box with a combination lock. The switch has two rotary dials with 12 positions each. I'd also like to be able to change the combination. What would be the best way to handle to build this circuit without requiring 24 input pins into my arduino?
I've read a little bit about shift registers, and it seems like that could be a useful solution, but as a total novice I'm not exactly clear on how to implement them. Anyone know of a simple beginner level guide for this?