PWM signal generator module - Operating voltage and range: DC 3.3V to 30V; duty ratio 0% to 100%; PWM frequency 1 Hz to 150 kHz; size 52x32 mm (2.05x1.26 in); ships in independent antistatic packaging. - Control interface and memory: frequency meter with single-chip TTL level communication at 9600 bps; four momentary push buttons to set parameters; supports serial communication control with power memory function. - Display and output: blue backlight LCD displays output frequency and duty cycle simultaneously; PWM output can set frequency and duty ratio independently; suitable as a square wave source for instrument testing or driving a stepper motor, among other uses. - Frequency resolution: 1 Hz range 1 Hz to 999 Hz (display 1 Hz); 1.00 kHz to 9.99 kHz (display 0.01 kHz); 10.0 kHz to 99.9 kHz (display 0.1 kHz); 1 kHz to 150 kHz (display 1 kHz). - Use scenarios: instrument testing as a precise square-wave source; drive stepper motors in motion control projects; laboratory experiments requiring configurable pulse signals.