precision signal generator: This DIY kit and shell can produce sine waves, triangular waves, and square waves. The frequency range is 1 Hz to 1 MHz, and the output amplitude is adjustable. Precise frequency control: Five accuracy resolutions with frequency adjustment options, enabling precise frequency settings. Flexible power options: Supports a wide input voltage range of 912 V DC or a 9 V battery, providing versatility for bench use or portable setups. Easy assembly and debugging: All components are plugin with a small number of parts, making installation and debugging straightforward and hassle. Applications and use scenarios Electronics prototyping and testing: Generate test signals for microcontroller timing, opamp circuits, filters, and ADC/DAC validation. Education and hobby projects: Use to teach waveform concepts, perform bench experiments, and practice signal conditioning. Field or portable testing: Powered by 9 V battery for onsite testing or use in environments without readily available power.