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These are aliases of the underlying types, so on Arduino Uno, int8_t is the same type as a char, and uint16 is the same size as an unsigned int. One note, if you’re editing a ‘.cpp’ file ...
This suits the commonly available Arduino shields which combine a 16×2 character LCD with a set of four tactile buttons in a cross formation.
You'll need an Arduino, of course, and you'll also need a pair of laser pointers, a few servos and motors to make the lasers move as time passes, and of course, the IKEA BLANDA salad bowl ...