To see animations of the display state, use the buttons in the "ANIMATE VALUE" pane to the right. Various buttons are also provided in the "SEGMENTS STATE" pane to let you easily change the lit state of all segments at once. You can toggle the lit state of individual segments of the display by clicking directly on the segments of the display, or you can click on the binary digits in the ABCDEFG and GFEDCBA segments state tables. You can choose a value to display by using the "VALUE SELECTOR" droplist. The seven segment display shown in this example is interactive. ![]() The main loop calls the function DisplayDigit to. Figure 5a: Arduino with seven segment display output The example code shown in Listing 1 repeatedly displays the digits 0-9 and the decimal point. It requires 7 digital I/O pins to drive the segments, 8 if the decimal point is included. ![]() ![]() The seven segment display is an old style of display device for displaying decimal numerals and a limited number of alphabetical characters (often utilizing LED or LCD electonics), which is often found in displays in pocket calculators, VHS and DVD players, digital watches, audio recording hardware, etc. Figure 5: Arduino Uno connected to seven segment display. In this example, an instance of the .Widget widget class is being used to wire up a seven segment display UI.
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