This DIY signal generator kit and shell provides a reliable source of test signals for electronics work. It outputs three common waveforms, offers precise frequency control, flexible power options, and easy assembly. Key benefits Versatile waveform output: capable of generating sine, triangle, and square waves for a wide range of testing and demonstration needs. Wide and tunable frequency range: adjustable from 1 Hz to 1 MHz with configurable output amplitude to suit different devices and experiments. Precise frequency control: five accuracy resolutions with both coarse and fine frequency adjustments for exact, repeatable settings. Flexible power options: supports 912 V DC input or a 9 V battery for benchtop use, portable setups, or field work. Easy to assemble and debug: compact design with directly inserted components and a minimal parts count, enabling straightforward installation and troubleshooting. Includes shell: compact housing to protect circuitry and provide a tidy, portable test tool. Technical specifications (consistent with original design) Waveforms: sine, triangle, square Frequency range: 1 Hz to 1 MHz Output amplitude: adjustable Frequency adjustment: five accuracy resolutions with coarse and fine tuning Power input: 912 V DC or 9 V battery Build: DIY kit with shell for easy assembly and use Practical applications Bench testing and characterization of amplifiers, filters, ADCs/DACs, and other signalprocessing circuits. Generating test signals for microcontroller projects, sensor calibration, or educational demonstrations. Debugging electronics projects and verifying signal integrity in development and lab environments. The product stays true to its core functions and design: a compact, easytouse signal generator kit with a shell, offering sine/triangle/square outputs, a wide adjustable frequency range, multiple precision settings, flexible power options, and straightforward assembly for reliable performance in various scenarios.