In order to wire the button to the breadboard I found a tutorial / walk-through on Arduino's site showing the proper layout and wiring schematics. I would like to learn more about how to properly wire ...

Here is a simple, yet useful circuit of an Arduino 4-digit 7-segment LED display unit. The module used here is a self-contained, compact common-cathode module containing four 7-segment LED numeric ...

After all, the Arduino isn’t actually measuring the CPU speed, nor is it directly controlling it (that’s still done by the original Turbo button wiring).