Two Wire Arduino Knight Rider Circuit and Sketch Using PCF8574 I/O expander IC
Arduinoから２ピンで複数のLED操作をする回路が参考になる。
Tutorial 18: Two Wire Arduino Knight Rider Circuit and Sketch Using PCF8574 I/O expander IC
Connect eight LEDs to an Arduino and make a Knight Rider display using only two Arduino pins in this tutorial. This is made possible by using a PCF8574 I/O expander IC.
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