A waveform generator is an electronic device that produces various types of electrical waveforms. These waveforms can include sine, square, triangle, and sawtooth shapes, which are essential for testing and designing electronic circuits. Waveform generators are commonly used in laboratories, educational settings, and for audio applications. These devices can be analog or digital, with digital waveform generators offering more precision and versatility. They allow users to adjust frequency, amplitude, and phase, making them valuable tools for engineers and technicians working with components like oscillators and amplifiers.