AT89C51 chip is used as the hardware core, flash ROM is used, which has 4KB ROM storage space. It can be used for 3V ultra-low voltage operation, and is fully compatible with MCS-51 series single chip microcomputer. However, when it is used in circuit design, due to the lack of ISP online programming technology, when debugging the circuit, it is necessary to burn the program due to error modification or new functions of the program, The chip will be damaged if it is pulled and inserted many times.