1Hz-150Khz PWM Board Module Pulse Frequency Duty Cycle Adjustable Module LCD Display Signal Generator Module XY-LPWM3

1. Three-way PWM output, adjustable frequency, three-way frequency output, duty cycle can be adjusted independently, suitable for most occasions;

2. LCD liquid crystal display frequency and duty cycle, very clear, very easy to adjust

3. Wide frequency range and high accuracy;

4. Serial communication

Module description
3-way PWM output, wide frequency range, duty cycle can be adjusted independently in real time;

Duty cycle values range from 0 to 100%, where 100% is expressed in A%.

All setting parameters are saved after power off.

The parameter settings

The module has 8 independent keys to set the frequency and duty cycle, support short press (increase or decrease a unit) and long press (fast increase or decrease), it is very simple, set parameters automatically save, power off is not Lost.

The 3-way duty-cycle button can be pressed at the same time, real-time adjustment, LCD display is the duty cycle of the last pressed button, real-time is very strong, can be used as a simple several-way duty cycle scan.

Module 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¡ãC.

Fourth, the scope of application:

1. It is used as a square wave signal generator to generate square wave signals for experimental development and use;

2. Used 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 the relevant circuit (PWM dimming and other applications).
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The frequency is divided into four ranges, automatically switching:

1.  XXX ( no decimal point ) : The minimum unit is 1Hz , the value range is 1Hz~999Hz 

2. The  smallest unit of X.XX (the decimal point is in the hundreds) is 0.01Khz , the value range is 1.00Khz~9.99Khz ;

3.  XX.X ( decimal point in ten ) : The minimum unit is 0.1Khz ; the value range is 10.0KHz~99.9KHz

4.  XXX ( decimal point is in ten and one hundred ) : The minimum unit is 1Khz ; the value range is 1KHz~150KHz

Ex  frequency display: 100  represents the PWM output 100Hz pulse;

-    1.01 represents the PWM output 1.01K pulse;

-    54.1  shows the PWM output 54.1KHz pulse;

-    1.2.4 indicates PWM output pulse of 124KHz ;

Duty cycle value range: 0~100% , 100% of which is represented by A0% .

All setting parameters are saved after power off.

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V. Serial Control (Single-chip TTL level communication)

Communication standard : 9600 bps Data bits  : 8 

Stop bits  : 1 

Check digit  : none 

Flow control  : none

1. Set the PWM frequency

"F101": The setting frequency is 101 HZ (001~999)

"F1.05": setting frequency is 1.05 KHZ (1.00~9.99)

"F10.5 ": Setting frequency is 10.5KHZ (10.0~99.9)

"F1.0.5": The setting frequency is 105KHZ (1.0.0~1.5.0)

2. Set the PWM duty cycle

"Dx:yyy": set the PWM duty cycle x: ( 1~3 ) PWM sequence number, yyy: ( 000~100 ) duty cycle % ;

For example D1: 050 , set the first one -way PWM duty cycle of 50%

3. Read the setting parameters

Send " read " string to read the set parameters.

The read data format is as follows: F156 , D1 : 052 , D2 : 059 , D3 : 058 ,

Successfully set back: DOWN ;

Failed to set return: FALL .