precision signal generator for DIY electronics projects. It can output sine waves, triangular waves, and square waves. Frequency range from 1 Hz to 1 MHz with adjustable amplitude. Five accuracy resolution with coarse and fine tuning for precise frequency control. Flexible power options. Can be powered by a 912 V external power supply or a 9 V battery for versatile operation. Easy installation and debugging. Low component count with direct insertion capability, making setup straightforward. Compact, reliable design suitable for hobbyists and educational use. Clear, straightforward performance without unnecessary complexity. Use scenarios Calibrating and testing measurement equipment such as oscilloscopes and other signal chains in a bench setup. Characterizing RC circuits, filters, amplifiers, and audio electronics to verify response and behavior. Educational demonstrations to illustrate waveform generation, frequency control, and amplitude adjustment in teaching environments.