The function of the system is to generate sine wave, triangle wave, square wave and sawtooth wave. The design principle is to use input signal processing, storage, signal fine-tuning and microelectronic adjustment to output the signal wave source. 555 multi-channel waveform generator is a kind of data signal generator, in which the system function is to generate sine wave, triangle wave, square wave and sawtooth wave. The design principle is to use input signal processing, storage, signal fine-tuning and microelectronic adjustment to output signal wave source. Principle is the most basic law or truth with universal significance.