precision signal generator This DIY signal generator can produce sine waves, triangle waves, and square waves. It offers a wide frequency range from 1 Hz to 1 MHz with adjustable amplitude, enabling versatile signal generation for a variety of applications. Five accuracy resolution Frequency adjustment provides five resolution levels with coarse and fine options for precise control. This enables accurate tuning of signals to match measurement or test requirements. Wide power supply range Powered by a 912 V external power supply or a 9 V battery, this generator offers flexibility for benchtop use, field work, or classroom demonstrations. The power options help ensure operation in different environments without extra adapters. Simple installation and debugging Designed with a small number of components and direct insertion capability, it is easy to assemble and quick to debug. The straightforward design supports fast setup and reliable operation. Practical use scenarios Benchtop electronics testing: generate reference signals to evaluate amplifiers, filters, oscilloscopes, and other test equipment. Microcontroller and ADC/DAC projects: provide stable test signals for calibration, PWM verification, and timing checks in development or prototyping. Education and demonstrations: illustrate sine, triangle, and square waves and demonstrate how frequency and amplitude affect circuit behavior in class or labs.