Description: 1,8255 a basic input and output: the ability to design their own interface development board realize toggle switch to control the LED light off. 2, water lights designed to achieve: the ability to design their own interface development board to achieve different toggle switch to control the LED lights change. For example, K1 from left to right, K2 from right to left, K3 from the middle to both sides, K4 from both sides toward the middle turn light off change. 3, the digital: the ability to design their own interface development board to achieve different toggle switch, digital display of the switch position value (1-8) if two or more simultaneously toggle switch, digital display " E" .
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