precision signal generator for DIY projects. This kit and shell can generate sine waves, triangular waves, and square waves. The output frequency can be set from 1 Hz to 1 MHz, and the output amplitude is adjustable. Precise and flexible frequency control. Five accuracy resolutions are available for frequency adjustment. Versatile power options. It supports a wide power supply range of 912 V DC input or a 9 V battery, providing flexibility for laboratory benches, field work, or portable use. Easy assembly and debugging. All components are directly inserted, minimizing the number of parts. The design supports straightforward installation and quick debugging, delivering a hassle user experience. Practical use scenarios Bench testing and calibration of microcontroller projects, PWM outputs, and ADC/DAC circuits. Educational demonstrations and handson electronics learning in labs or DIY classrooms. Calibration and signal testing for audio electronics, sensor simulations, or equipment verification in hobbyist or professional settings. Key attributes at a glance Waveforms: sine, triangle, square Frequency range: 1 Hz to 1 MHz Output amplitude: adjustable Frequency accuracy: five resolutions for adjustment Power: 912 V DC input or 9 V battery Assembly: plugin components, minimal parts, easy debugging This product maintains the intended functionality, specifications, and form factor of the original DIY kit and shell, while presenting the features in a concise, customerfriendly format that supports clear decisionmaking.