Use steps: 1. Connect to power supply; 2. Press switch for 10 seconds to switch between Normal mode and Precise mode; 3. Short press switch to set frequency and change value by rotating switch; 4. Press switch for 2 seconds to set duty cycle; 5. Keep pressing for 5 seconds to lock set parameters; 6. Test; 7. Press button 'ON/OFF' to turn on or off PWM output; 8. Remove power and connect load to use module. The XY-KPWM signal generator is a device that provides electrical signals at various frequencies, square wave outputs, and adjustable levels. It is used as a signal source or excitation source for testing. Widely used in production practice and technical applications. Features: 1. With outer casing 2. LCD high-definition display 3. Supports UART communication 4. Supports frequency adjustment 5. Supports duty cycle adjustment 6. High-precision detection 7. Supports power-down memory function 8. 1-channel PWM output 9. Dual work mode 10. Knob supports lock function to avoid misoperation 11. Supports enable output Parameters: 1. Product name: XY-KPWM PWM Signal Generator 2. Model: XY-KPWM 3. Working voltage: DC 3.3V30V 4. Frequency range (Normal mode): 1Hz150kHz 5. Frequency range (Precise mode): 1Hz15kHz 6. Frequency accuracy: 2% 7. Duty cycle accuracy: 1% in Normal mode 8. Duty cycle accuracy: 0.1% in Precise mode 9. Duty cycle range: 0.00%100% 10. Output current: Approximately 530mA 11. Output amplitude: Same as input voltage 12. Operating temperature: -40C to 85C 13. Operating humidity: 0%95% RH (non-condensing) Applications: 1. Square wave signal generator for experimental development 2. Generate square wave signals to control motor drivers 3. Generate adjustable pulses for microcontroller units (MCUs) 4. Used in dimmer circuits 5. Speed control applications Color: Black Material: Plastic Size: 71 x 39 mm Package Contents: 1 x Signal Generator Note: Light and screen display differences may cause slight variations in color compared to the actual item. Measurement error allowed is 13 cm.