In the single-chip microcomputer system, LED (light-emitting diode) digital display is often used to display the working status of the single-chip microcomputer system, calculation results and other information. LED digital display is an important output device for the single-chip microcomputer to communicate with people. Figure 1 shows the structure of the LED digital display. It is actually composed of 8 light-emitting diodes. Among them, 7 light-emitting diodes are arranged in the shape of \"8\" stroke segments. The other light-emitting diode is in the shape of a dot. It is installed in the lower right corner of the display and used as a decimal point. Through different combinations of light and dark of the light-emitting diodes, Arabic numerals 0-9 and other various characters that can be composed of these stroke segments can be displayed.
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