
A great way to show some examples of *physical calculations* is to connect the Arduino to the real world. Download a simple demo program to demonstrate a four-digit digital display, a buzzer, six independent LEDs, an ADC (analog-to-digital converter), and three pushbutton switches. You can find an online manual by googling the product name. [Revain didn't let me post the URL.] All pinouts are explained, but it would be nice to have a full schematic.

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