旋转编码开关是一种可以识别转向的旋转开关，在自动控制和仪器仪表中有着很广泛的应用。本例实现使用一只旋转编码开关控制8个LED点亮的功能。下载试验程序后，顺时针转动开关，会看到被点亮的LED个数变多，逆时针转动开关，会看到被点亮的LED变少。同样，对程序稍加改编利用即可巧妙的完成按键难以达到的良好控制效果。-A rotary switch is turned to the rotary switch can be identified, in the automatic control and instrumentation has a very wide range of applications. This example implementation uses a rotary switch controls the function of 8 LED lights. Download the test program, clockwise rotation switch, LED lit up to see the number of changes and more, turn the switch counter-clockwise, you will see fewer LED lit. Similarly, use of the program can be a little clever adaptation of the completion of key difficult to achieve good control effect.