accuracy waveform generator built with ICL8038 and a speed operational amplifier. It can output sine, TripleCornered, square, and forward or reverse sawtooth waves. Supports biamping, uses no block capacitors, and provides adjustable frequency and amplitude. This signal generator is a professional DIY kit that can generate sine wave, TripleCornered wave, square wave, and positive and negative sawtooth wave. It is a solder and install DIY kit. Frequency range: 5 Hz to 400 kHz; duty cycle range: 2% to 95% (adjustable) Applications and use scenarios Electronics lab bench testing: generate test signals to verify amplifiers, filters, and circuits across a wide frequency range. Audio and instrumentation work: test and calibrate audio amplifiers, modulators, and signal paths with precise waveforms and adjustable duty cycle. Educational and hobby projects: learn signal generation concepts, assemble and a professional grade signal source, and explore waveform effects in experiments.