Working Voltage: 3-30V; Frequency Range: 1Hz~150KHz; Frequency Accuracy: Approximately 2% in each range Signal Load Capacity: Output current can be around 5-30mA; Output Amplitude: PWM amplitude equals supply voltage Ambient Temperature: -20~+70°C Module Description: PWM output allows separate setting of frequency and duty cycle Frequency is divided into four ranges, with automatic switching: 1XXX (no decimal point): Minimum unit is 1Hz, range is 1Hz~999Hz; 2XXX (decimal point in the hundredths place): Minimum unit is 0.01KHz, range is 100KHz~999KHz; 3XXX (decimal point in the tenths place): Minimum unit is 0.1KHz; range is 100KHz~999KHz 4XXX (decimal point in the tenths and hundredths place): Minimum unit is 1KHz; range is 1KHz~150KHz Frequency Display Example: 100 indicates 100Hz PWM output pulse; 101 represents 101KHz PWM output pulse; 541 represents 541KHz PWM output pulse; 124 indicates 124KHz PWM output pulse Duty Cycle: 0~100%; All settings are saved upon power off Parameter Setting: The module has four independent keys for setting frequency and duty cycle. It supports short presses (increase or decrease by one unit) and long presses (increase or decrease rapidly). Settings are automatically saved and retained after power loss. Application Scope: 1. Used as a square wave signal generator to generate square wave signals for experimental development. 2. Used to generate square wave signals that control motor drivers. 3. Generate adjustable pulses for MCU applications. 4. Generate adjustable pulses to control related circuits (PWM dimming and speed control applications). Size: 78x42x26cm/30.7x16.5x10.2 inches Note: Please allow 1-3mm error due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x PWM Pulse Frequency and Duty Cycle Adjustable Module