• LCD display frequency and duty cycle, very clear, PWM output can be set to the frequency and duty cycle;
• Wide frequency range, high precision;
• Serial communication, TTL level;

Module Feature:

• PWM output, you can set the frequency, duty cycle;
• Frequency is divided into four ranges, automatic switching:
• XXX (no decimal point): the smallest unit is 1Hz, the value range of 1Hz – 999Hz;
• X.XX (decimal point in the hundred) the smallest unit is 0.01Khz, the range of 1.00Khz – 9.99Khz;
• XX.X (decimal point in ten): the smallest unit is 0.1Khz; value range of 10.0KHz – 99.9KHz
• X.X.X (decimal point in ten and hundred): the smallest unit is 1Khz; value range 1KHz – 150KHz 

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 automatically saved. 

Parameter Settings:

• The module has four independent keys, used to set the frequency and duty cycle, support touch (increase or decrease a unit) and long press (fast increase or decrease), set the parameters automatically save, power down Not lost. 

Module Parameters:

• Working voltage: 3.3 – 30V;
• Frequency range: 1Hz – 150KHz;
• Frequency accuracy: the accuracy in each range is about 2%;
• Signal load capacity: the output current can be about 5 – 30ma;
• Output amplitude: PWM amplitude equal to the supply voltage;
• Ambient temperature: -20 – +70 degree 

Application:

• Used as a square wave signal generator, generate square wave signal for experimental development and use;
• Used to generate a square wave signal that controls the motor driver;
• generate adjustable pulse for MCU use;
• generate adjustable pulse, control the relevant circuit (PWM dimming speed and other applications).
• Serial control (single-chip TTL level communication) 

Communication Standard:

• 9600 bps Data bits: 8
• Stop bit: 1
• Check digit: none
• Flow control: none 

1, set the frequency of the PWM

• “F101”: Set the frequency to 101 HZ (001 to 999)
• “F1.05”: set the frequency of 1.05 KHZ (1.00 – 9.99)
• “F10.5”: Set the frequency to 10.5KHZ (10.0 – 99.9)
• “F1.0.5”: set the frequency of 105KHZ (1.0.0 – 1.5.0) 

2, set the PWM duty cycle

• “DXXX”: set the PWM duty cycle to XXX; (001 – 100)
• Such as D050, set the PWM duty cycle is 50% 

3, read the set parameters

• Send a “read” string to read the set parameters.
• Set successfully return: DOWN;
• Setup failed to return: FALL.