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Product Description: Working Voltage: 3.3V-30V Frequency Range: 1Hz-150KHz Adjustable Duty Ratio: 0-100% Adjustable Frequency Accuracy: Approx. 2% in each range Signal Load Capacity: Output current approx. 5-30ma Output Amplitude: PWM amplitude is equal to the power supply voltage Environmental Temperature: -20 to +70 degree Celsius This PWM Wave Signal Generator Module, adopt LCD display frequency and duty cycle, wide range and high precision of frequency setting, supporting TTL serial port communication. High frequency resolution: XXX, Frequency Range: 1Hz-999KHz, Display Resolution 1Hz; X.XX, Frequency Range: 1.00Hz-9.99KHz, Display Resolution 0.01kHz; XX.X, Frequency Range: 10.0kHz-99.9kHz, Display Resolution 0.1kHz; X.X.X, Frequency Range: 1kHz-150kHz, Display Resolution 1kHz. Application: 1. Used as square wave signal generator to generate square wave signal for experimental development and use; 2. Used to generate square wave signal to control the motor driver; 3. Generate adjustable pulse for MCU use; 4. Generate adjustable pulse and control related circuit (PWM dimming and speed regulation, etc.). Serial Port control (SCM TTL level communication): Communication Standard: 9600 bps Data Bit: 8 Stop Bit: 1 Check Bit: None Flow-Control: None Set PWM Frequency: "FXXX": 001Hz-999Hz "FX.XX": 1.00kHz-9.99kHz "FXX.X": 10.0kHz-99.9kHz "FX.X.X": 1kHz-150kHz Set PWM Duty Ratio: "DXXX": Set PWM duty ratio to XXX(000-100) (for example, D050, set PWM duty ratio to 50%) Read Setup Parameters: Send the "read" string Set Successful Return: DOWN Set Fail Return: FALL Package: 1pc PWM Rectangular Wave Signal Generator