Key benefits Provides a simple singlechannel signal source that outputs a square wave with approximately a 50% duty cycle, useful as a basic clock or timing reference for digital circuits. Onboard adjustable resistor allows control of output frequency without needing external components. Onboard power indicator confirms when the device is powered, aiding quick diagnostics. Compact footprint for spaceconstrained projects: board size is 29 mm by 12 mm. Specifications Output: singlechannel signal output, approximately a 50% duty cycle square wave. Frequency control: onboard adjustable resistor to set the output frequency. Frequency range: 10 Hz to 5 kHz. Power supply: operating voltage 5 to 12 V. Board size: 29 mm x 12 mm. Use scenarios Microcontroller timing tests: generate a clocklike signal to verify timing and response characteristics of digital circuits during development. Bench testing of circuits: provide an adjustablefrequency square wave source to evaluate the behavior of filters, amplifiers, or digital inputs under varying frequencies. Compact prototype projects: serve as a small, selfcontained signal source in spacelimited designs or evaluation rigs where board real estate matters.