Function at a glance Generates a square wave output with amplitude approximately equal to the input voltage, delivered through the output terminal. Frequency is adjustable using a builtin multiturn potentiometer. For the L version, the adjustment range is 0.8 Hz to 60 Hz. Duty cycle and stability Output duty cycle is not adjustable. As you change frequency, the duty cycle remains basically stable within the range of 50% to 65%. Key attributes Square wave output suitable for timing, signal generation, and testing applications. Amplitude closely matches the input voltage for straightforward interfacing. Version specification L version frequency range: 0.8 Hz to 60 Hz. Practical use scenarios Microcontroller timing tests: generate a controllable lowfrequency clock signal to verify timing routines and interrupt handling. Sensor and actuator testing: provide a repeatable square wave input to observe device response and timing characteristics. Educational demonstrations: illustrate how frequency changes affect output timing while observing duty cycle stability. Why this helps you Simple, reliable frequency control with stable duty cycle reduces calibration effort. Directly compatible output amplitude simplifies connections to measurement instruments and test setups. Clear, lowfrequency square wave generation supports core electronics, lab experiments, and development workflows.