Introduction - If you have any usage issues, please Google them yourself
Programmed to achieve single-chip I/O port for LED control, so water light show upward and downward flow, stop the flow, flashing lights and other functions, by different keys to control water lamp light method, LED work through the keyboard scan implementation. Wherein the LED adopt common cathode connection, in order to connect the LED via an I/O port sends low level to achieve
LED lighting.