Amazon.com: Adjustable PWM Generator, Motor Driven 2‑Channel Duty Cycle Pulse Frequency Module for Motors for Generators : Patio, Lawn & Garden
PWM Signal Generator 1 Channel LCD Digital Pulse Frequency Duty Cycle Adjustable Square Wave Signal Function Generator Module|Integrated Circuits| - AliExpress
Amazon.com: NEJE Laser Module Tester Digital PWM wave pulse 0.01%-100% output, 0%-100% input, 0Hz-20KHz VPP 3.3V-12V Digital Signal Generator Adjustable Frequency Duty Cycle : Industrial & Scientific
Amazon.com: Icstation PWM Frequency Meter 1Hz-150KHz DC 3.3V-30V Adjustable Duty Ratio 0~100% Square Rectangular Wave Signal Generator LCD Display : Industrial & Scientific
Amazon.com: PWM Pulse Frequency Generator, Icstation Signal Generator Module DC 3.3V-30V Function Generator 5-30mA 1-Channel 1Hz-150kHz PWM Pulse Frequency Duty Cycle Square Wave LCD Display : Industrial & Scientific
Motor Speed Controller DC5-12V High/Medium/Low Signal PWM Pulse Signal Generator Speed Regulator Switch Module for Pulse Frequency Signal: Amazon.com: Industrial & Scientific