Check the listing for details. Signal Generator PWM Pulse Frequency Duty Cycle Adjustable Module LCD Display. Condition: New. Listed at 4.50 USD. DescriptionPWM output, you can set the frequency, duty cycle;Frequency is divided into four ranges, automatic switching:1. XXX (no decimal point): the smallest unit is 1Hz, the value range of 1Hz ~ 999Hz;2. X.XX (decimal point in the hundred) the smallest unit is 0.01Khz, the range of 1.00Khz ~ 9.99Khz;3. XX.X (decimal point in ten): the smallest unit is 0.1Khz; value range of 10.0KHz ~ 99.9KHz4. X.X.X (decimal point in ten and hundred): the smallest unit is 1Khz; value range 1KHz ~ 150KHz e.g. frequency display: 100 indicates PWM output 100Hz pulse;1.01 indicates PWM output 1.01K pulse;54.1 indicates that the PWM output has a pulse of 54.1 kHz;1.2.4 indicates that the PWM output is 124 kHz pulse; Duty cycle range: 0 ~ 100%;All set parameters, power down save. Product parameters:1. Working voltage: 3.3~30V;2. Frequency range: 1Hz~150KHz;3. Frequency accuracy: The accuracy in each range is about 2%;4. Signal load capacity: The output current can be around 5~30ma;5. Output amplitude: PWM amplitude and supply voltage are equal;6. Ambient temperature: -20~+70°C Serial Port ControlCommunication standards: 9600 bps data bits: 8Stop bit: 1Check digit: noneFlow control: none 1. set frequency of PWMF101: set frequency to 101HZ (001 to 999)F1.05: set frequency to 1.05KHZ (1.00 to 9.99)F10.5: set frequency to 10.5KHZ (10.0 to 99.9)F1.0.5: set frequency to 105KHZ (1.0.0 to 1.5.0) 2. set PWM duty cycleDXXX: set PWM duty cycle to XXX: (001 to 100)Such as D050, set PWM duty cycle is 50% 3.read the set parametersSend a "read" string to read the set parameters.Setup successfully return: Down;Setup failed to return: FALL. Application scope:1. It is utilized as a square wave signal generator to generate square wave signals for experimental development and use;2. Utilized to generate a square wave signal to control the motor driver;3. Generate adjustable pulses for use by the MCU;4. Generate adjustable pulses, control related circuits (PWM dimming speed control, etc. applications) Package Included:1 x Signal Generator PWM Pulse Frequency Duty Cycle Adjustable Module LCD DisplayInstructions are NOT included.