Figure 3-10, LED display is also known as digital tube, LED display consists of 8 light-emitting diodes. The seven long bar-shaped light-emitting tubes are arranged into "day" glyphs, while the other dot-shaped light-emitting tubes are used in the lower right corner of the display as a display decimal point, which can display a variety of numbers and some English letters. THERE ARE TWO DIFFERENT FORMS OF LED DISPLAYS: ONE IS AN ANODE CONNECTED BY EIGHT LIGHT-EMITTING DIODES, CALLED A CO-ANODE LED DISPLAY, AND THE OTHER IS AN EIGHT-LIGHT-EMITTING DIODE CATHODE CONNECTED, CALLED A CO-CATHODE LED DISPLAY. As shown in Figure 3-11. This design uses a common anode digital tube display.
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