● Easier to learn In the tutorial the electronic model is connected to the open source software Fritzing, and the wiring uses different colors to perfectly represent the physical connection of the project, which is easier to learn.
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74HC595 and LEDs. Use 74HC595 and 8 LEDs to create an LED water light project. The feature of 74HC595 is that it can convert 3 inputs into 8 outputs. Since the E/A port resources of arduino are limited, using 74HC595 5 E/A port resources can be saved to connect other devices. But the chip makes the LED control a little slower, about 500,000 times per second instead of 8,000,000 times per second, but it is still so fast that you dont notice any changes.
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4-bit digital segment display. As for controlling the digital tube at least 8 E/A connections are required, the 74HC595 is used to extend the E/A connection. The 4-bit digital tube can display different contents or the same contents. These must be controlled by the driver. In this example project, the 4-bit digital tube is controlled so that the same content is displayed. The display content is between 1 and 9, from A to F. After you master the use method of the digital tube, you can use the digital tube on other projects. It will be a good display tool for you.
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