The diagram and the legend presented below are brought to explain how circuit and gate demonstrations work in this tutorial.

        1. Inputs

        These are clickable buttons. Once clicked, input button changes color, its value toggles from 0 to 1 and vice versa. Toggling input value (sometimes in correct sequence) triggers new state of logic circuit.

        2. Logic Gates

        Logic gates are shown in green color. You can learn more about basic logic gates by reading the first section of this tutorial.

        3. Calculation formula

        Some of animations presented in this tutorial have a logic formula displayed, describing the current status of logic circuit or gate.

        4. Output

        Output symbols look exactly like input symbols. There is only one difference - the output symbols are not clickable and are shown only to display resulting values of a logic circuit or gate.

        5. "Wire - 0"

        6. "Wire - 1"

        Logic gates, input and output symbols and other elements are connectd with read or blue lines, representing electrical wires. Red wire represents a wire currently carrying a "1" signal, and blue wire carries "0" signal.