This also is an intro to interrupts. Interrupts are functions that interrupt the main function when something is triggered. Pressing reset on your computer is an interrupt. It allows for small, fast, or critical functions to work in the background.
This instructable uses shift registers to control the 7 segmented display, but they are covered in detail in another instructable. Visit that one for more info. http://www.instructables.com/id/Arduino-powered-7-seg-LED-display-using-Shift-Regi/
Like all my instructables, this one was made at TechShop.
Step 1: Materials
- A quadrature rotary encoder. (This means that it has 2 outputs. You need two to determine direction)
Here is an example: