Use steps: 1. Connect to power supply; 2. Press rotary switch for 10 seconds to switch between Normal mode and Precise mode; 3. Short press rotary switch to set frequency and adjust value by rotating the switch; 4. Press rotary switch for 2 seconds to set duty cycle; 5. Hold press for 5 seconds to lock set parameters; 6. Test; 7. Press 'ON/OFF' button to turn PWM output on or off; 8. Disconnect power, then connect load to use the module. XY-KPWM PWM Signal Generator is a device that provides electrical signals at various frequencies, including square wave, with adjustable output levels. It serves as a signal source or excitation source for testing in production and technical applications. Features: 1. Enclosed housing 2. High-definition LCD display 3. UART interface support 4. Adjustable frequency 5. Adjustable duty cycle 6. High-precision measurement 7. Power-down memory function 8. 1-channel PWM output 9. Dual operating modes 10. Rotary knob with lock function to prevent accidental operation 11. Output enable function Specifications: 1. Product name: XY-KPWM PWM Signal Generator 2. Model: XY-KPWM 3. Operating voltage: DC 3.3V–30V 4. Frequency range (Normal mode): 1 Hz–150 kHz 5. Frequency range (Precise mode): 1 Hz–15 kHz 6. Frequency accuracy: ±2% 7. Duty cycle accuracy (Normal mode): ±1% 8. Duty cycle accuracy (Precise mode): ±0.1% 9. Duty cycle range: 0.00%–100% 10. Output current: Approx. 5–30 mA 11. Output amplitude: Matches input voltage 12. Operating temperature: –40°C to +85°C 13. Operating humidity: 0%–95% RH Applications: 1. Square wave signal generation for experimental development 2. Motor driver control via square wave signal 3. Adjustable pulse generation for microcontroller units (MCUs) 4. Dimmer circuits 5. Speed control circuits Color: Black Material: Plastic